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FPCNOTES.TXT This file documents changes in F-PC, Version 2.25 => 3.55 °Whats-New SUMMARY of some new things (item number): DELETED WORDS: XFDOS (26), TYPESEG (83) <EXEC> (122) NEW WORDS: FPATH FPATH+ .FPATH (4), DELIMITER (5), MCROWS (9), CLOSEALL (11), { } (19) (20), VIEWFROM (34), TONE (54), +PLACE (107), 14 more words (83), FPCVER# (109), LEAVEPROMPTON LEAVEPROMPTOFF (111), OTHER.CHECK MLOAD (115), <EMMEXEC> FPC>EMM (122), UBETWEEN -SKIP (127), BLINKON, BLINKOFF, BLINK!, PAL!, BORDER@ and BORDER! (131), LISTSET (135) NEW FEATURES: Hypertext (24) (31) (36) (42) (43) Mouse (25) (40) (41) (129) Pull-down stack (15) Rotate thru files (44) (45) (46) (47) Scroll PgUp, PgDn (51) Escape sequences in ." (57) Help in editor (16) (23) (33) Visual vocabulary stack (86) Load marked lines from editor (115) New memory management (116) Bug fixes in multi-tasking (119) Expanded memory support (122) Swap to EMM, DISK support for Shell (124) Watch point support in debugger (132) 1. Fixed bug in SEQDOWN. 2. *** Increased maximum nest of file loads from 4 to 7. 3. Discarded this change. 4. *** Added multi directory search to OPEN. F-PC now has a path list like DOS. The pathlist is set by a configuration file that is loaded automatically at F-PC execution time. The words to do this wonderful stuff are as follows: FPATH <path-string> <enter> \ sets the Forth PATH FPATH+ <path-string> <enter> \ adds more to the Forth PATH .FPATH <enter> \ displays the Forth PATH The words $FILE, $FLOAD, FILE and FLOAD now search the Forth PATH while trying to open and or load the file specified. The search order is controled by the order path specs are placed in the path string. In the following example: FPATH E:\FPC\SRC;E:\FPC\HLP;E:\FPC\TOOLS <enter> Here the E:\FPC\SRC directory is searched before the E:\FPC\HLP directory which in turn is searched before the E:\FPC\TOOLS directory. The Forth PATH may be up to 132 characters long. 5. Added a word DELIMITER, which is a VALUE that holds the delimiter character used by LINEREAD as the end of a line to be read. DELIMITER defaults to $0A, a linefeed. It is useful at times to be able to read lines from a file that does not contain linefeeds, but only carriage returns. Changing DELIMITER to $0D will allow this. Also useful for "ASCIIZ" files delimited by a zero -- change DELIMITER to $0. 6. The print menu bug has been fixed; it caused the cursor to disappear after re-directing printing to a file. 7. Fixed an undocumented bug in SEDSHELL.SEQ. For some reason unknown to me I had changed version 2.25 so it could not recover ram while editing, when it wanted to spawn a DOS shell. Thus it was not possible to perform any but the most trivial DOS operations when spawning a shell from the editor. This has been fixed. The editor recovers all of the ram it can while leaving enough room in memory for the file currently being edited, then spawns the DOS shell. The space is recovered when the shell terminates. 8. Fixed a bug in the assembler that was found by Bill Muench. It seems there was code in the assembler to allow a register indirect operation without having to specify the index value if the offset was 0. Unfortunately the way the assembler was checking for the stack depth change, didn't work, and you always had to specify the index for the assembler to work. The usless code to test the stack depth has been removed. The local label array which defaults to a size of 32 labels, has been modified to allow adjusting the number of local labels at runtime. Normally you would not need to do this, but it seems Robert Smith needed HUNDREDS OF LABELS for some reason. If you create a new array of B/LLAB times the number of labels you need bytes, and plug the address of the array into the VALUE LLAB[], then change the VALUE MAX-LLABS to the new maximum, you can use however many local labels you might need. 9. Added a VALUE to VIDEO.SEQ called MCROWS. If you have problems with your cursor disappearing on an EGA or other video card, you can change the value of MCROWS in the F-PC.CFG file to a smaller number, and thus get your cursor to re-appear. MCROWS stands for "Maximum Cursor ROWS", and is used at boot time to limit the number of cursor rows used when changing the cursor size in the word BIG-CURSOR. 10. Changed the default for headerless words to FALSE. F-PC will normally be shipped with all headers present; the EXTEND.BAT word will extend the system will all headers present. The EXTENDA.BAT file has been deleted, and has been replaced with EXTENDH.BAT for headerless extension. I and several people I have talked to have run into problems because many words in F-PC 2.25 were headerless, so the default now is to have the headerless mechanism present, but turned off. 11. Added CLOSEALL, to make it easy to close all open files. Also modified the too many files open message to suggest using CLOSEALL to remedy the problem. Also modified SEQDOWN to clip the VALUE SEQHANDLE to be within the valid range of the handle stack. Some programs may change SEQHANDLE to point to some other handle; this protects us from crashing if this has been done and not restored. 12. Fixed minor bug in >VIEWFILE, that was preventing view from working on the names of files in the FILES directory. Also adjusted 1FILE and FILES_SET so they use HERE+1000 rather than HERE+500, so they would not conflict spacewise with WORDS. Added a new utility called ID, that works like WORDS, but displays the first line of the source file for each matching word. The line is preceeded by the word name so you can easily sort the file in the editor. 13. *** ****** BUG FIX, for possible SERIOUS error condition!! ****** In the routine that writes edited text to disk, there is a routine called FLUSHWRITE. This word is supposed to return a boolean flag FALSE if the write was successful, but in the release version of F-PC, it would only return a flag if there was text that needed to be written. If the amount of text to be written happened to have been divisible by the write buffer size, then FLUSHWRITE would not have had any text to write, and would not have returned a flag, causing unpredictable results. Usually a crash back to DOS, but sometimes a system HANG. FORTUNATELY the data being edited was secure, having already been written to disk and the file closed, and the bug would ONLY show it self in one (1) out of a thousand edits, since the write buffer size was 1k. FIXED This bug was also affecting the Z editor. 14. Fixed bug in LINEEDITOR: it was pulling in text from the right when you press backspace even when in OVERTYPE mode mode. It should have simply been erasing the character to the left of the cursor and left the line length alone. 15. Added Window type Pulldown stack: try pressing BOTH SHIFT KEYS together when there is something on the stack. See the source in the file WINSTACK.SEQ. 16. Added Word HELP within the editor: position the cursor on a word while editing a file, and press Alt-H. A HELP and VIEW window will pop up, giving you information about the word the cursor is positoned on. You can use the arrow keys and PgUp, PgDn to move through the source file. Pressing Enter copies the top visible source file line to the Cut/Copy/Paste file and moves down to the next source line. Alt-V can then be used to insert the lines that were copied back into the file you are editing. ESC returns to the edit. VERY HANDY at those times when you know what word to use, but can't remember how it is used exactly. 17. *** Corrected the sensitivity of F-PC to think a file terminated with a ^Z was an error. It now scans the file end on loading for ^Z's, and changes them to blanks. Also if any line of a file is not terminated with a CRLF, F-PC won't just stuff two blanks at the line end anyway. 18. Screen wouldn't clear in SLOW mode. Fixed by adding a BIOS call to clear the screen when DARK was used in SLOW mode rather than using the fill memory routine in both SLOW and FAST. 19. Added Glen Haydon's { } tool to F-PC, allowing a file to contain comments with imbeded source rather than the other way around. See the file BRACES.SEQ for more information. 20. Adjusted the file load mechanism so the contents of the deferred word RUN is saved before and restored after the load of a file. This allows Glen's { } tool to not terminate a file with { and still function properly. 21. *** 03/27/89 ** THIS CHANGE REVERSED IN 102 ** Changed the name of F-PC to F-TZ to make Dr. Ting happy. He thinks there will be confusion if I send out any versions of F-PC that are not exactly version 2.25. 22. Removed the user tools from the system disk. From now on these will be an extra item available on a seperate disk. 23. Modified word help in the editor. It now consists of three commands, Alt-E, Alt-B, and Alt-H, used as follows: Alt-E Nest and EDIT the file containing the word under the cursor. Alt-B Nest and BROWSE the file containing the word under the cursor. No changes can be made. Alt-H Nest and BROWSE the file containing the HELP for the word under the cursor. No changes can be made. These EDITOR commands are complemented with new commands at the FORTH command level: REPAIR <name> Starts Editing the file containing E <name> <name>. BROWSE <name> Starts browsing/viewing a file VIEW <name> containing <name>. B <name> V <name> HELP <name> Starts browsing the help file for H <name> <name>. When in BROWSE mode, no changes can be made to the file, but you can still copy sections out to the TEMP.SEQ file for insertion into the file you were editing. The above commands used in the editor actually save the current edit context, and nest into a new edit. A "+1" to "+5" will appear in the upper right hand corner of the screen to help you remember how deeply you are nested. When you quit an edit, you will pop back one level to the previous file you were editing, with the cursor in the same place where you left off. Changes to a file are automatically saved when you nest edits. 24. *** In line with the previous changes, I have added a sort of Hyper text mechanism. Thanks to George Hawkins for the inspiration for this feature. A word \HYPER has been added that is used to start a hyper text file. Within the file is ordinary text, as well as a marker to signify a destination for a hyper text link. The marker is then placed at the source where you want a branch to occur. While this may not be a clear explanation, you can look at the editor help file for a good example of how these linkages work. Just press F1 whenever you are using the SED editor. These linkages can be setup in any file, and are made available when the hyper text file is compiled on F-PC. Now you don't have to be concerned about space, as only the markers take up room in the dictionary, and then only for the header and NOOP CFA. All hyper words are placed in the HYPER| vocabulary which is always searched first when a browse (Alt-B) command is performed. 25. *** 04/10/89 Completed first pass a mouse support for F-PC. The mouse can now be used for many things. At the Forth command level, you can use the mouse and left button to position the cursor on the current command line being edited. The right button is the same as ESC, and enables and disables the menubar. When the menu is enabled, you can use the left button to pull down menus like any other program with pull down menus and mouse support (press and drag). The mouse is also available while in the editor for cursor position adjustments, etc. Mouse support costs about 3k of memory, and is optional. If you don't want mouse support, just don't load the files MOUSE.SEQ, and MOUSEY.SEQ. You can add mouse support to your programs by writing a button driver. Look at the file MOUSEY.SEQ for some examples of button drivers. A button driver is required for each "MODE" in your program, typically involving a test for where the mouse is on the screen, and then the performance of a function. The mouse button can also return keystrokes as if they were typed on the keyboard. 26. 04/11/89 Deleted the word XFDOS from KERNEL2.SEQ. It was only used by MEMSET, which has been replaced with the code word SETBLOCK which was being loaded at extend time, but has been moved into KERNEL2.SEQ. For those of you using XFDOS, you will have to copy the XFDOS definition out of your existing systems kernel file and load the code definition on top of F-PC. 27. Un-wound several CODE words that were calling sections of other CODE words. This costs a few more bytes, but facilitates testing I am doing. 28. Modified Meta Compiler to allow local labels to work. It seems the new local label mechanism was not compatible with the meta compiler, and has thus been modified to make it compatible. This also resulted in some small changes to PASM.SEQ. 29. 04/12/89 Found and stomped on an insidious bug in %FIND. The instruction sequence: MOV PRIOR # 0 should read MOV PRIOR # 0 WORD Under VERY RARE conditions (i.e. a vocabulary on a 256 byte boundry), %FIND would not be able to find words in a particular vocabulary. This cost me a WHOLE DAY to find. This bug is also in all earlier versions of F-PC. 30. *** 04/13/89 Corrected another condition that has been present since the beginning of my sequential file editor design. Horizontal scrolling is now being done a single character at a time rather than the half screen scroll I used to use. The half screen scroll was intended to minimize whole screen re-displays, but since I can re-display the entire screen 10 times a second on an XT class machine, there is no real reason for the half screen scroll. This new way of scrolling is much better. Mouse support has also been added for horizontal scrolling. Keyboard support for horizontal scrolling is done with SHIFT SPACE to scroll RIGHT, and ALT SPACE to scroll LEFT. This is as yet not documented any other place. 31. 04/18/89 I have reworked the hypertext mechanism to remove the link destinations from the dictionary. I got up to about 80 links, and they were consuming about 2k of dictionary space. Since I want to be able to handle many more (hundreds of) links, the dictionary overhead seemed excessive. I moved the links into a file called HYPER.NDX, which is compiled by the batch file MAKINDEX.BAT. The index file consists of link names followed by line number offset into the target file. The filenames are included in the same file, as the first line of a group of links for that file. The filename is flagged by a graphic character 249 as the first character in the line. As you would expect there is an increase in the time required to find a link when the word being found is in the index file. The tests I have done indicate I can find a single link in a 1000 link file in less than 1/2 second on an 8 MHz AT. On an XT class machine or from floppy, it will take longer. 32. I have finally standardized on one way of using the variable LOADLINE. It used to be used to hold either a line number, or the offset into a file, depending on where it was being used. This caused some problems, and has been changed. LOADLINE always contains the line number of the most recent line read from LINEREAD, or the line number of the most recent edit line when you leave the editor. 33. *** The meanings of some of the F83 words have been modified. The Editor/Browser provides two basic modes, Edit-Change, and View-N0-Change. A number of the familear F83 words can be used to invoke either the editor or the browser depending on the word used. Here is a list of words and their function: VIEW <name> Enter browser on definition <name>. Aliases for VIEW are: BROWSE V B L ED <name> Enter the editor on definition <name>. Alias for ED is: E HELP <name> Enter browser on help for <name>. Alias for HELP is: H n1 EDIT Enter editor on current file at line n1. n1 LIST Enter browser on current file at line n1. The F10 key can be used to leave any of the above browse or edit modes. 34. 04/18/89 Evening Added VIEWFROM and an alias VF to allow viewing very large files from a specified starting line number. It is used in the form: OPEN FPCGLOS.TXT A very large file 300 VIEWFROM <enter> Skips the first 300 lines of the file and starts reading at line 300. This is useful for examining very large files. You should of course be carful not to switch to edit mode and change such a file lest it get written back to the original file on disk. You can use Alt-W to write the read portion of the file out to a new filename. 35. 04/22/89 Adjusted KERNEL4.SEQ to save and restore the status of the CONTROL BREAK flag on entry and exit. F-PC was setting the flag, and leaving it set when you leave Forth, which of course could confuse some other programs. 36. *** Adjusted COLD so it won't crash if you execute it again from the keyboard. Its initialization is only done once, after which it performs BOOT then QUIT. 37. *** 04/24/89 Much thanks to Robert Berkey, who has lately been working with F-PC. He gave me a multi-page list of small bug fixes, cleanups and optimizations, most of which I have installed. Here is a list of the effected areas: Adjusted decompiler SEE to handle the following words properly: ['] IS CASE OF ENDOF ENDCASE Changed name of 2+! to D+!. Added save and restore of BP and SI to BIOS level INT's. Added CODE optimizations to the following words: 0< 0= 0<> 0> = <> U< U> ?DUP *D WITHIN BETWEEN DUP>R ?BRANCH -TRAILING OVER 2DUP 3DUP 2OVER PICK Added the following new CODE words: PLUCK RPICK DOENDOF DOENDCASE VFIND was added to make it easy to search a particular vocabulary for a word. Adjusted (KEY) so it can return a null ^@ character. Fixed bug in FLOOK and all words that use FALLOF. Fixed bug in printer typing. If you simply typed "1 PRINTING !" F-PC would seem to go crazy and print a lot of junk to the printer. This was caused by the command line editor. It now switches to the old version of expect if it detects the printer being turned on. Again thanks to Bob for the above modifications. They have been individually installed and tested. 38. 04/26/89 I discovered that KEY? is somewhat slower now that mouse support has been added. This resulted in a slower search in the editor because I was checking the keyboard on every line searched. I have changed it to only check the keyboard once every 128 lines are searched. This seems to speed the search up to normal again. 39. I discovered that when you were entering a string to do a search while in the editor, you could press Alt-O and the file selection box would popup just as if you were at the Forth command level. This is clearly a bug, and in fact caused the editor to crash back to Forth when I canceled the selection. The problem stems from the table of functions assigned to function keys when you are using the line editor. I resolved the problem by duplicating the line editor's function key table, and installing the menu alternate keys only in the table being used by XEXPECT. 40. 04/27/89 Added mouse MARK to the editor. If you position the mouse at an upper line, press the left button and drag the mouse down, lines will be shown in reverse video indicating they are marked for a subsequent cut or copy operation with Alt-X or Alt-C. 41. 04/29/89 Added page up and down to the screen mouse support. Minor cleanup in the file PRINTING.SEQ adjusted the CUT command to properly cut all of the lines specified even if it's the last line in the file. Several other minor fixes associated with this in the file SEDITOR.SEQ. It is now not possible to write a zero length file, you will always get at least two characters even if you delete all of the lines in the file. It seems you used to be able to delete all lines in a file, causing WRITE.FILE to try to write a negative size file which translated to an infinitely large file. FIXED Added mouse support to the browse prompt box that is shown when you try to switch to browse mode from edit mode and changes have been made. (ESC-A-B) 42. 05/01/89 version 3.x12 Added a new menu to the SED editor, called HYPER. It contains all of the hypertext link and unlink words. It also contains the two new commands to create source and destination hyper links Alt-F3 for a source link, and Alt-F5 for a destination link. Press ESC-Y to see the hYper menu. 43. If you print a file while in browse mode, hypertext destination links will not be printed. They will be blanked as they are shown on the screen. 44. *** Evening Added the ability in SED to toggle between the top two files on the file stack. This is done with Alt-F1. Not as fast as editing two files in memory since you have to reload a file when you switch, but it is very convenient and reasonably fast. 45. 05/02/89 morning before work Enhanced the above mechanism, to rotate through whatever files have been opened. Again you use Alt-F1, which works very well. I now also want to add a file pick mechanism to allow selection of one of the files already opened from a list in a window. 46. Add the file pick mechanism mentioned above, called Flip as Shift-F1. It pops up a window and allows you to select any one of the files in the file stack, which is then brought to the top. The FILE menu has been adjusted to take into account the flip mechanism: you now can leave all edits with a single command rather than unlinking to level one first. 47. *** 05/04/89 Robert Smith has completed going through the source and help files for KERNEL1.SEQ and KERNEL2.SEQ. He has added to and corrected the comments. Thank you BOB! Adjusted the decompiler so it will scroll the upper portion of the screen when it is used by the debugger to keep the area of the definition visible on the screen. This was VERY difficult to do and in fact is not yet perfected. It is however functional, and useful. The rotate through open files command Alt-F1 now has an oposite function to rotate backwards through the list. The key combination is Shift-Alt-F1. 48. *** 05/10/89 Generalized the following list of VALUE operators: !> =: @> SAVE> SAVE!> RESTORE> These operators now are smart about their use on USER variables and deferred words. They will work properly when used on either normal variables values and deferred words, or their USER equivalents. 49. *** Went through and documented SAVEREST.SEQ, SAVEREST.HLP, EQUCOLON.SEQ, EQUCOLON.HLP, KERNEL4.SEQ and KERNEL4.HLP. 50. LARGE SCREEN INFORMATION I have experimented with the CornerStone full-page display, and it has some interesting peculiarities. To get it to work with F-PC in FAST mode, you will have to include the following commands in your F-PC.CFG file: $B001 =: VIDEO-SEG 7 =: VMODE-VAR >MONO FAST The video bios for the CornerStone monitor is not well behaved. As you can see it does not use a standard start of screen address. 51. 05/14/89 Made a very small but useful change to the editor user interface: the Control PgUp and Control PgDn keys now scroll the screen up and down respectively like Control W and Control Z. They were the same as Control Home and Control End which was a useless duplication. 52. *** 05/17/89 ** THIS CHANGE REVERSED IN Nr. 103 ** Modified DOENDCASE this date to perform a DROP so it does not have to be done manually. This requires you change ALL of your uses of this CASE statment to delete the DROPs you now have before ENDCASE, or YOUR CODE WON'T WORK. Also installed a warning into ENDCASE for the next few releases to help make this obvious to the user. This change to ENDCASE resulted in changes to several files including the PASM.SEQ file. 53. 05/19/89 Fixed a bug in $>EXT : it was always assuming a three (3) character extension string was being passed, and if a shorter string was passed, a garbage character would be appended to the handle. 3 54. *** 05/23/89 Added TONE for sound generation. Made BEEP a deferred word, and defined NEWBEEP to use TONE to do BEEP. The value BEEPFREQ controls the frequency of BEEP, and value BEEPDURATION sets the duration of BEEP in tenths of a second. TONE takes frequency and duration and can be used to generate all of the various beeps a PC is expected to generate. 55. Minor cleanup in XEXPECT: it now reacts more as expected when you use up and down arrow to step through the line list. Also increased the line stac047epth to twelve (12) lines from six (6). 56. 05/24/89 Fixed bug in PREPEND.PATH. It was removing the specified drive designator, and was not restoring it under all conditions. Fixed bug in LINEEDITOR. Some variables were being used on each invocation, and were preventing LINEDITOR from being re-enterant. LINEEDITOR is still not re-entrant, but it can be nested if you clear out its buffer on exit from the nested edit. For my purposes this is adequate. 57. *** Added another feature! ." now recognizes imbeded escape sequences. The leadin is "\" as in "C". The functions available are: 0 Normal display attributes 1 to 8 Attributes 1 through 8 :xx Delay xx tenths of a second < Save the current cursor position (nonest) > Restore the previous cursor position (nonest) @xxyy Move cursor to xx,yy B Beep the speaker D Dark (clear screen) N Newline (CRLF) R Select Reverse video Sxx Display xx spaces T Perform a Tab \ Display a \ character ` Display a " character | Display a linefeed character See the file PERTYPE.SEQ for additional information. 58. *** 05/26/89 modified the way MARK works in the editor. Selecting F3-MARK now enters a mode where you may move the cursor up and down to select lines and those lines selected will be shown in reverse video. Pressing F3 again ends the mark operation, leaving the selected lines in reverse video until a CUT or COPY operation is done, or F3 is pressed again to clear the mark. This seems much more intuitive than the way it worked before. Top status line changes to tell you you are in MARK mode after the first F3 press. 59. 05/27/89 Corrected OK bug per George Hawkins, It should be doing a test for ?FILEOPEN before actually trying to load. It does now. Thank you George! 60. Implemented MANY of Mike Sperl's kernel enhancements. Many clock cycles were saved in several places. Thank you! 61. Thank you! Tim Smith for the bug fix in TURNKEY. It may not be the only bug, but you have to fix them as you find them. 62. *** Fixed limitation in SPACES. It was limited to outputing 132 spaces before quiting; that limitation has been increased to 32767 spaces. Thank you Zafar Essak! 63. 05/30/89 Re-organized things a bit: moved EDITSET.SEQ to the end of the editor load, so it can be used to set all of the editor keys. Removed the FNSET and CTLSET operations from SEDWHELP, HELPLINK, and HTYPE and moved them into EDITSET where they belong. EDITSET is now up to date and can be examined to see ALL of the editor commands. 64. 05/31/89 Added listing capability to the assembler. The HEX addresses and generated code are displayed at the left of the listed output. The words to control generation of the listing file are: /LISTING Enable listing output /NOLISTING Disable listing output The listing normally goes to the display, but can be redirected to the printer with "PRINT", or to the browser with ">B". 65. Adjusted copyline (F5) in the editor to bump the end marked line if the start markline is equal to the end line. This keeps at least one marked line visible as long as a mark is set. 66. *** Robert Smith updated the KERNEL3.HLP documentation file. Thank you Bob. 67. Adjusted all places that were changing the deferred word RUN. They now save and restore its function rather than just setting it back to <RUN>. 68. Version 3.X18 06/01/89 0u 69. 06/01/89 Fixed a bug in the LINEDELETE function in the editor. It was setting the current displayed file length to "2" when you deleted the last line. This was not correct, but was cosmetic, not affecting the actual file length. 70. Adjusted >BROWSE to preserve the current BASE and use DECIMAL when displaying the status box number. 71. Minor optimization in %FIND. 72. Adjusted editor so the values LAST.TEXTLINE and LAST.TEXTCOL are set only at program startup, and not at editor space allocation time. This will allow any manual window size adjustments to remain as they are set, and not switch to full screen after a DOS command. 73. 06/02/89 Added \TYPE to PERTYPE to allow typing interpreted strings from CODE space. 74. 06/05/89 Added two new functions to the editor. The normal Control-O open file function has been extended to allow Shift-Control-O, which will copy the word under the cursor into the open file buffer allowing you to easily open the filename under the cursor. The search function has been enhanced with the addition of Control-F6, which copies the word under the cursor to the search buffer before prompting for a string to search for, allowing you to easily search for another occurance of the word under the cursor. 75. 06/06/89 For those of you that NEED LOTS OF MEMORY, I have added a new file to ZIMMER.ZIP. It's called EMMHEADS.SEQ, and it will setup F-PC to use expanded memory for its HEADS. This frees up about 64k of NORMAL RAM for other things. It is even smart enough to only use expanded memory for heads if there is expanded memory available. So far I have not put this in the KERNEL, aren't you glad? It does cost about 2k in .EXE file size. 76. 06/09/89 Corrected a small bug in TAB expand: it now saves the contents of the search buffer before setting the search string to a TAB character. The search buffer is later restored after tab expansion is complete. 77. 06/16/89 Corrected a bug in %USAVE>. It was not saving the USER variable properly. 78. 06/19/89 Corrected a bug in COMP. It was restoring ES on the wrong side of a conditional, such that if you ever passed null length compare string to COMP, it would set ES to JUNK from the stack, most likely resulting in a CRASH!! It is amazing I never ran into a problem with this, but at least it is now fixed. 79. 06/26/89 Corrected a bug in the assembler, The long forward branch L$ and L$: were being resolved with a "!", rather than a store to the target code space. This was preventing my new target compiler from resolving the initialization branch properly. Added T! to the list of assembler deferred target words, and modified the L$: to resolve with T!. Modified the target compiler to set "T!" to "!-T". 80. 06/28/89 Kept running into the problem where information going to the printer also shows up on the screen. The reason this happens is that (TYPE) was coded that way. I say was, because it is no longer coded that way. Cleaned up (TYPE), so it tests PRINTING, and either calls PRNTYPE, or CONTYPE for printer, and console. This change will no doubt bother some people, but it is much cleaner to have print control output to one or the other, and not both. This is especially true when you start trying to use printing with an application which has a screen oriented user interface, and still needs to do printing. 82. 06/29/89 Added ARRAY and AT? to F-PC. While building my new target compiler I needed a defining word to make arrays, so the target compiler could be setup to only include an array if it was used. So I added ARRAY to the target compiler. Then I realized I would need ARRAY in Forth so I could debug the programs written for the target compiler; thus the addition. Ditto for AT?. 83. 07/05/89 Added MANY changes from Robert Berkey, including but not limited to the following words: &> GOTO JOIN ?DROP COUNTL +XSEG MORE? VIDEO-TYPEL QTYPEL $.L $.R DU< SAVECURSOR RESTCURSOR Restructured the type words somewhat. The low level type word used to use a variable called TYPESEG to control where typing occured from. This caused TYPESEG to be saved and restored in several places to prevent it being set wrong in one place versus another. Overall this was a crude way to control typing. Bob adjusted things somewhat so the low level word was a long type "TYPEL". The TYPE word ALWAYS types from the CODE SEGMENT, and if you need to type from some other segment, you use TYPEL or QTYPEL. Overall this is much better than what I had before, and the code is cleaner to boot. Bob has also made a number of changes to the debugger, many of which I liked very much. But when I tried to integrate his debugger with my system, I ran into many problems due to other changes he had made that I did not want to include. SOOO.. after looking at the debugger code, I decided to update it with Bob's features and a few more along with a much needed cleanup. The debugger now deals well with deferred words, does words etc. and you can even unnest above where you entered the debugger. Added is the ability to debug through EXECUTE, PERFORM, and the EXEC: structure. Overall after the cleanup, I think the debugger actually got smaller. 84. 07/06/89 Modified F-PC so all file opens are done READ-ONLY. This allows examination of read only files in the editor. Since writes are always done with HCREATE which makes the file ready for writing, there is no problem with this unless you plan to append to a file in which case you need to use READ-WRITE before the open to allow writing to an existing file. The words added are READ-ONLY, WRITE-ONLY, and READ-WRITE. 85. 07/06/89 Modified the software floating point to be compatible with the 3.X22 version of F-PC. Since %NUMBER has been moved into assembly, I needed to make the lower level number handlers for HEX, '(tick), and ^(control) deferred so they could be changed by floating point in a way that was compatible. Relatively minor mods to SFLOAT3.SEQ to make it work. 86. 07/08/89 Added Robert Berkey's visual vocabulary stack order to the status bar. The vocabulary order is now displayed at the top right of the screen, just below the normal status line in a vertical column. CURRENT is shown on line one with attribute three, and the CONTEXT list is shown below it in attribute one, down to ROOT. Very useful! thank you Robert. 87. 07/12/89 Modified the line editor to use a trailing attribute called ">EDATTRIB" when displaying the portion of the edit line after the text currently being edited. The purpose of this is to allow you to see how much text is really in the buffer, and where it ends. The >EDATTRIB is currently set to >ATTRIB3 while in the editor, and >NORM while at the command line. 88. 07/12/89 Added a control to the change 84. The word DEF-RWMODE now allows you to specify what the default read/write mode will be for file open operations. It is used as follows: READ-WRITE DEF-RWMODE or READ-ONLY DEF-RWMODE F-PC still defaults to using READ-ONLY. If you need READ-WRITE, you will need to use the above command. 89. 07/12/89 Version change to 3.X23 90. 07/17/89 Modified the editor so that it opens READ ONLY files in BROWSE mode. 91. 07/17/89 Modified editor so F10 doesn't simply drop you out of the editor when you are only nested one level. It pops up the OPEN box, to give you the opportunity to open another file. If you then press ESC, you will leave the editor. This is a significant change in that many people will HATE it because it is a change, but when you get used to it, it will help prevent accidental exits. The change was also carried over to the Z editor. 92. 08/11/89 I'm back from vacation, had a wonderful time. We went to Magic Mountain, and several other colorful places. Didn't make a single change while I was away. Amazing! 93. 08/11/89 Fixed left margin printing default so it is not reset each time you open and edit a file. 94. 08/15/89 Adjusted CTLSET and FNSET so that they don't abort if the word they are trying to install in a function table is not defined. They simply display a warning message stating the problem and continue. This allows some functions to be removed from the compile list (saving space) without having to change EDITSET.SEQ. 95. 08/15/89 **** Major version change 3.30 **** Removed the experimental warning message from the system: am preparing for the next major release of F-PC!! 96. 08/19/89 Fixed a bug reported by Mike Mayo. I had the value WITHPATH set to TRUE, which caused filenames to be saved in the FILES vocabulary with their full paths included. He was working in a three level nested directory that caused the filename with path to extend to 35 characters. This caused F-PC to truncate his filename to 3 characters (sort of a MOD function). No warning was given, and VIEW would not work. It is also likely head space was damaged by the long name, since >NAME after that would not work reliabily. This bug was fixed by doing two things: 1. Setting WITHPATH to OFF. Don't need path anyway since we have FPATH to help us find files. 2. Adding a warning to "HEADER to prevent creation of names longer than 31 characters. 97. 08/25/89 Fixed a bug reported by Mike Mayo. The word (FNUMBER?) in the software floating point package was not returning a double number zero when a number conversion failed. This caused problems in the editor when trying to browse words that had been indexed with the NEWZ editor's index compiler. Fixed (FNUMBER?) so it returns a FALSE flag, and a double number zero on number conversion failure, and modified the editor to use NUMBER? rather than %NUMBER for its browse line number conversion. 98. 09/01/89 Added a new feature to the debugger at the request of Mike Mayo. "Skip To" Allows you to visually select a place further forward in a definition while in the debugger, and have the word you are debugging continue at high speed until the place you selected is reached. Debugging then continues with the single stepper. Skip To is enabled with "S" in the debugger, then you use "+" and "-" to step forward or backward through the definition. Press ESC to cancel skip, or Enter to accept the skip. 99. 09/05/89 Finally fixed the bug in the file selection box that was preventing the selection of a file with no extension. It used to try to create a new file: now it will let you pick such a file. 100. 09/07/89 Generalized the color control a bit, and added a new word COLORSET. It causes the current screen colors to become the default screen colors as "NORMVAL". In other words it allow you to set your screen color preferences so they will be maintained if you do an FSAVE. Try the following: LTGRAY >BG BLUE >FG COLORSET <Enter> If you now save the system, you will have blue letters on a light gray background until you change it again. 101. 09/13/89 **** Version 3.33 **** Added -SCAN to the file SCAN.SEQ. I needed this word in the target compiler, and so I thought I would add it to the F-PC ystem as well. 102. 09/21/89 **** FPC Version 3.34 **** Renamed all occurances of F-TZ and FTZ to F-PC and FPC. 102.1 09/22/89 Bug fix in FPATH+. Mike Mayo found you could not put FPATH+ on a line with other commands: it would gobble up the entire line following FPATH+. FIXED 103. 09/26/89 **** FPC Version 3.35 **** Modified ENDCASE back to be the same as FPC 2.25. This per the request of the FPC working group. ENDCASE no longer does the DROP automatically. Adjusted the LIST size up about 8k, so about 34k of COLON definition space is available in the un-installed F-PC.EXE file. 104. 10/16/89 **** FPC Version 3.36 **** Have been working on the glossary. It is not completely up to date, but it is getting there. 105. 10/22/89 **** FPC Version 3.50 **** Official release version. 106. 05/25/90 **** FPC Version 3.51 **** Started a minor update, to incorporate most if not all of the known bug fixes to FPC 3.50. Added HCRITICA.SEQ from Mike Christopher, to make DOS return a FAIL condition if a critical error occurs. This prevents the user from issuing an Abort, when we have not unhooked the interrupt vectors we hooked in during startup. The bug fixes repaired include the VIEW fix by Robert Patten, all of the bugs listed with repairs in FPC350.BUG, and all of the locations in FPC that were using the LOOPNZ assembly word. These include UPPER, ?UPPERCASE, SEXE and LARGEST. 107. 07/02/90 Adjusted the max line number allowed while editing a file to be increased by 50 percent, to allow files with very short lines to be edited. Modified PRINTING.SEQ to update the status line while printing, every 8 lines, so the user will be able to tell how much of the print process has been done so far. Added +PLACE a nice compliment to PLACE, it appends a string to an exsiting counted string in memory. Made some adjustments to the file load mechanism. I have seen some re-occuring problems with the file load words, that would cause them to return from a nested load to the wrong place in a file. I hope I have solved these problems. Fixed a bug in the editor in <RED>. It was supposed to save and restore TYPEL, but it was restoring TYPE instead. FIXED 108. 07/03/90 **** FPC Version 3.52 **** Fixed the Alt-W bug. The SED or Z editors could trash your files if you did an Alt-W when nested down two or more levels. This has been fixed. All I had to do was turn off the NEWFL flag when backing out a level. 109. 07/05/90 **** FPC Version 3.53 **** Added FPCVER#, a constant that return the current version scaled by 100 of F-PC, it currently returns 353. Can be used to adjust programs for version compatibility. Also added a file 350COMPAT.SEQ to make F-PC 3.50 compatible with the current release. This file contains the additional words added to F-PC, not any of the bug fixes. 110. 07/06/90 After reading Peter Midnights FORML paper again, I have added a key to the editor "Alt-8" that toggles on and off a display of the name of the function to be executed for each editor key pressed while editing. The function name is shown in the upper left corner for 4 tenths of a second. This doesn't add all the functionality Peter implimented, but it does make it possible to explore how the editor works if you are so inclined. 111. 07/13/90 Added an option, LEAVEPROMPTON and LEAVEPROMPTOFF allow you to specify if you want to be asked for a file to edit on leaving the editor. The default is NO. This is a change from all previous versions where the default was YES. Also added Robert Berkey's favorite function to the menus. When Bob fixed the view bug, he also add a special editor command to show where a word you have the cursor on was loaded from. That is show the place where the FLOAD occured that caused this word to be loaded. the command isn Ctrl-F9. It has been added to the "hYper" menu. 112. 07/25/90 **** FPC Version 3.54 **** Added the top F2 and bottom F4 of screen functions to the EDIT menu. Also added top middle Alt-F2 and bottom middle Alt-F4 screen functions to SED as well as to the EDIT menu. Changed Page up and down so they no longer automatically move the cursor to line 6 when they are performed. After having it like that for a year, I can't take it any more. SED now leaves the cursor on whatever line it was on before doing a page up or down (unless you hit the beginning or end of the file). 113. 07/30/90 Fixed some spelling bugs in WORDS. USER-DEFERED, DEFERED and USER-VARIABLE were spelled wrong. Also added COLON.* to work along with :.* in listing colon definitions. Also fixed the longtime bug that converted 'a' as 'A' when entered in interpret state. I added the suggested SKIP'C' that was shown in the FPC350.BUG file, but I coded it in assembly so performance wouldn't be effected. 114. 11/05/90 **** FPC Version 3.5401 **** Fixed a bug in WFL.SEQ, seems it would return the <a1> anyway under the conditions where the user pressed Enter on a list of no files. FIXED Modified FPCVER# to be a DOUBLE NUMBER of five digits. .FPCVER# then discards the lowest two digits and displays the highest three digits as X.XX. You can get the read version number by typing "FPCVER# D." 115. 11/10/90 **** FPC Version 3.5402 ***** Someone submitted a file called MLOAD.SEQ. It was such a neat idea that I had to include it in the system. MLOAD allows you to edit a file, mark some lines you want to load (using F3), leave the editor, and then press F9 to load the marked lines. This is VERY convenient for debugging. Space cost, is about 150 bytes. 116. 02/06/91 **** FPC Version 3.5500 ***** Reworked FPC to use a new memory management mechanism. This version introduces the POINTER concept. A pointer is a word that returns a physical memory paragraph number (16bits) to the user when executed, after allocating the needed memory if it hasn't already been allocated. If a pointer fails to allocate the desired memory, then a zero (0) is returned indicating an out of memory condition. Pointers are defined as follows: <double_number_size_in_bytes> POINTER <pointer_name> 1024. (a double number, note the ".") POINTER XYZ A small data structure is created to hold the pointer information. No space is actually allocated for the pointer until it is first used. memory allocated with pointers is appended to the memory FPC already uses in a "heap". Another word "UNPOINTER>" can be used to release the memory allocated to a pointer. It is sued as follows: : release_XYZ ( -- ) UNPOINTER> XYZ ; UNPOINTER> can only be used in a definition. If you need to release a pointer interactively, use the sequence: ' XYZ %UNPOINTER <enter> Not pretty I admit, but normally this operation is done only while in a program. Several words have been added to FPC, to support the new memory management system, here is a list: #PARS holds the number of paragraphs currently allocated. PHEAD Variable that points to the head of the pointer list. UD16/ Unsigned double number divide by 16. DPARAGRAPH Convert the double number to a number of paragraphs. SIZEOF!> Set the size in double bytes of the POINTER following. Exmpl: <double_num> SIZEOF!> XYZ 0POINTERS System word that clears out all pointers. Don't ever use this word in any of your programs. CMOVE-PARS CMOVE-PARS> Move paragraphs of memory. See their source for the syntax of how they are used. MAXBLOCK Returns the maximum number of paragrahs that can be allocated without getting an allocation error. All of FPC and TCOM have been modified to work with this new memory management system. I recommend you use it as well, rather than the old ALLOC and DEALLOC. Also added .VERSION to display the whole version number including the least digits. 117. 02/12/91 ***** Version 3.5501 ***** Installed the code from POSTHEX.SEQ into KERNEL2.SEQ. This effects "%NUMBER". Now you can use sufixes of H to specify, Hex or B to specify Binary. This is in addition to a $ prefix meaning HEX, and 'letter' meaning ascii, and ^letter meaning CONTROL. Has no effect on your ability to define word names, but if you define a word that fits into any of the above catagories, then it will be a function rather than a number! Also added expanded memory support into the kernel. This is in preparation for later enhancements that I hope will move most of F-PC out of memory into expanded memory when performing a shell to DOS. Also added ".MEM" which tells you how your F-PC memory is being used along with the names of the pointers using the memory. The last line of .MEM tells how much DOS memory is still available. 118. 02/13/91 Installed a new editor status line from John Peters. Editor status line now shows current and max values for line, column, page and lines. Very nice, thank you John. Added SELECT to the ZIMMER.ZIP file. SELECT.SEQ is an onscreen menu system. Provides automatic handling of many menu functions, and gives the user a good interface at the same time. TRY IT! Added LASERJET.SEQ as a loaded part of F-PC. So F-PC now supports either the IBM ProPrinter, or the HP LaserJet/DeskJet family of printers. 119. 02/20/91 Enhanced .MEM to display the status of expanded memory as well as normal DOS type REAL memory. Fixed some bugs in MULTASK.SEQ, that was preventing the multi-tasking data structure from being relocatable. This was preventing any application that used multi-tasking from running properly unless it was reloaded into exactly the same memory space as it was first created. This was NOT GOOD. It is now fixed, although there was a small performance penalty due to a runtime conversion from absolute to relative and back again on each task switch. 120. 02/25/91 ***** Version 3.5502 ***** 121. 02/27/91 A new command 'S' under the Alt-O menu in the editor, allows editing of files containing TABs. SED will expand the tabs on the display, and only expand the tabs in the file of those lines you change. Fixed SED so you can now edit .BAK file. When you select such a file, SED switches into NOBACKUP mode, and allows the file to be edited. If you make changes and save the file, then the changes are saved into the .BAK file. The NOBACKUP mode has also been adjusted to not bother .BAK and .$$$ files when you are editing the primary source file. This is incase you are editing a primary file, and a >BAK file together, and making changes to one, then other or both. 122. 02/28/91 Added a command to the editor, "Ctrl-\" that displays the current memory usage in the computer. F-PC now moves itself into EXPANDED memory when you shell out to DOS if there is enough expanded memory available. If there isn't, then is just shells out, and leaves itself in memory. The Expanded memory allocated is only allocated while you are shelling out, and is then deallocated upon return to F-PC. The file EMMEXEC.SEQ and a modified version of EXEC.SEQ make this all possible. 123. 03/04/91 Fixed a minor bug in ".FILES". It had an escape sequence in it to print 8 spaces followed by a dash ( \s8- ), unfortunately the \s escape sequence needs two digits following it, not one so 80 spaces were being displayed not 8. Corrected as ( \s08- ) to display 8 spaces followed by a "-". While I'm at it, I might as well document the list of escape sequences available in "dot quotes": This utility allows the creation of special ." strings that contain imbedded escape sequences to select various display operations. The leading character is "\", followed by: 0 Normal display attributes 1 to 8 Attributes 1 through 8 :xx Delay xx tenths of a second < Save the current cursor position (not nestable) > Restore the previous cursor position (not nestable) @xxyy Move cursor to xx,yy B Beep the speaker D Dark (clear screen) N Newline (CRLF) R Select Reverse video Sxx Display xx spaces T Perform a Tab \ Display a \ character ` Display a " character | Display a linefeed character The performance of this version of ." will be somewhat slower than a normal TYPE, as the string must be scanned for the "\" escape character. 124. 03/05/91 Fixed the bug? in /STRING that was preventing it from extending the length of a string when fed a negative number. Added a variable USE-EMM, and words EMMON and EMMOFF to set it. The state of USE-EMM set to FALSE, will cause the word EMM-PRESENT? to return a false even if Expanded Memory is present. EMMON is the default state of USE-EMM (TRUE). Added variable USE-DISK, and words DISKON and DISKOFF to set it. The state of USE-DISK set to FALSE, will cause F-PC NOT to flush itself to DISK when no Expanded memory is available. Setting it to DISKON will make F-PC flush itself to disk whenever a SYS command is performed. Currently a file "FPCIMAGE.$$$" in the handle EXTHNDL is being created to hold the F-PC image during the shell. DISKOFF is the default state of USE-DISK (FALSE). EXTHNDL can be filled with any "DRIVE:\PATH\FILENAME.EXT", to cause the FPC image to be written to any ramdisk or drive desired. the default name will be used if no other file is specified. Expanded memory is given preference over disk even if DISKON is used, so type EMMOFF and DISKON to force F-PC to save its image to disk. On a real disk drive, this can take several seconds both for the save, and later for the recover. This facility is primarily useful for those people that don't have expanded memory, but do have EXTENDED Memory that can be changed into a ramdisk. For maximum performance, don't let F-PC save its image anywhere, use EMMOFF and DISKOFF (default). Note, a disk full error on image save will still cause F-PC to perform the shell to DOS, but F-PC will not save itself to disk. Also note that F-PC deletes the FPCIMAGE.$$$ file after the shell is performed and lastly, FPCIMAGE.$$$ can be almost as large as your computers memory (greater than 500k), so be sure you have a lot of memory on you EXTHNDL file drive before using DISKON, or you will use time and gain no benefit. 125. 03/06/91 Added "SWAPFILE" which is followed by a name, and sets the disk swapfile drive and name. DISKON is also performed, to cause F-PC to swap to disk when a shell is performed. Added ">HANDLE to take an a1,n1 string rather than a counted string and move it into the specified handle. 126. 03/07/91 Added words to ZIMMER.ZIP to control blinking background colors, and to read and set the border colors. *** MOVED INTO F-PC *** 127. 03/13/91 ***** Version 3.5503 ***** Added UBETWEEN and -SKIP to F-PC. 128. 03/15/91 Added DOBORDER to <REEDIT> in SEDIT2.SEQ, to assure that a border would be shown even if the user types commands while the editor is loading the current file. 129. 03/30/91 Integrated the new mouse driver from Mike Christopher. there is now a cursor for the mouse, and another one for F-PC. 130. 04/05/91 Located and removed all references to things like "1 -1 d+" which were used to shorted an address and length on the stack. Changed all of these occurances to the equivelant "1 /string" which doesn't have the carry problem from the count to the address if an underflow occurs. 131. 04/08/91 Moved the file BLINKER.SEQ from the TOOLS directory, into the SRC directory, and now load it as a normal part of F-PC. This adds the words BLINKON, BLINKOFF, BLINK!, PAL!, BORDER@ and BORDER!. 132. 04/10/91 ***** Version 3.5504 ***** Fixed a bug in DOBORDER, that was keeping it from displaying the corner symbol at the upper right of the screen. At the recomendation of Jerry Boutelle, I have added watch point support to the debugger. This allows a 16 byte area ofCODE memory to be monitored between each step of the debugger. It can be very handy for watching HERE. The "W" command in the debugger, brings up a watch set command line, so you can type in an address that will be watched. If you type a word that returns an address, then that address will be watched. If you want to watch a word that doesn't return an address, enter it as " 'WORD " (without the "s ), and the CFA will be the watch address. 133. 04/12/91 Added for Mike Mayo, a new variable, and three instructions to WORD. The variable is called ">IN_WORD", and it is set by WORD to be the line offset in TIB of the most recent word parsed out with WORD. For example is you did a WORD on the first word in this line, then >IN_WORD would contain an 8. This is useful for building index files, that want to know exactly where in the source file a particular word came from. The performance penalty is insignificant. 134. 04/23/91 ***** Version 3.5505 ***** Added LISTSET to the F-PC dictionary, it allows the user to adjust the amount of dictionary space desired, as the number of paragraphs of free space F-PC should retain on the next startup. The value #LISTSEGS is adjusted, and the memory image is resaved to the same name as the currently executing file. Correction to the mouse driver, it seems Mike Christopher modified the OLD MOUSE.SEQ file, not the current one, so when I included his new file, it had the OLD mouse bug in it. Fixed so the mouse doesn't show up unless you move the mouse the first time. Changed the file COLOR.SEQ, to allow the user to more easily modify the colros F-PC uses. F-PC now uses an array called COLORS, which contains eight sets of background and forground colors for ">ATTRIB1" through ">ATTRIB8". The new words BG@, BG!, FG@ and FG! allow setting the colors in the array to control the colors F-PC will use. See the file COLOR.SEQ for more details.