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HTBasic for Windows Release Notes Release 7.4 TransEra Corporation 375 East 800 South Orem UT 84097 phone (801)-224-6550 fax (801)-224-0356 Web page: http://www.transera.com ftp site: ftp://ftp.htbasic.com/pub/htbasic e-mail: htb-sales@transera.com or htb-support@transera.com _______________________________________________________ This file contains information regarding changes and additions that have been made since the last printing of the manuals. Manual Corrections/Additions ----------------------------------------------------- Installing and Using Manual - Tenth Revision Page 17 The Keyboard Reference Guide and the Keyboard Functions template no longer ship with HTBasic. For this information see chapter2 Page 37 Add: 1600. The 1600 option provides compatibility for most newer HP DeskJet printers. This option is ignored unless the PCL5 and COLOR options are included. Reference Manual - Tenth Revision Page 51 Sample should read: Msb=BINIOR (-1,2^14) Page 76 Last paragraph include sentence: String variables must have their length declared when declared in a COM variable. SRM/UX Capability ----------------------------------------------------- HTBasic can now be a full SRM/UX client with the addition of a DLL available through Test and Measurement Systems (TAMS). This allows an HP 200/300 with BASIC/WS that was connected to an SRM/UX system to be replaced by a PC and HTBasic. SRM/UX networking now allows files to be shared between HTBasic on a PC and HP computers with HP-BASIC/WS or workstations with HP-BASIC-UX/300 or HP-BASIC-UX/700. Now in an SRM/UX network an old series 200/300 computer can be replaced with a PC running HTBasic without any other changes being made to the way the system operates. SRM/UX provides all of the networking management for the TransEra PC client. This new capability dramatically increases the ability of HTBasic to be a direct replacement for HP-BASIC/WS. Changes\Fixes Since Last Release ----------------------------------------------------- **************Release 7.3 to Release 7.4************** 1) DEL in legacy editor would cause GPF if it deleted across contexts. This has been repaired. ----------------------------------------------------- **************Release 7.2 to Release 7.3************** 1) Unassigned Softkeys would cause program hang. This has been repaired so undefined softkeys do not hang. 2) Find Command restored to the Search Menu. 3) DAQNI driver updated to correct ouput function. 4) ON TIMEOUT support was added to the Serial driver during TRANSFERs. 5) ON TIMEOUT support for software timeouts was added to the HPIBS driver. Previously only hardware timeouts were functional. ----------------------------------------------------- **************Release 7.1 to Release 7.2************** 1. Support was added for Outbound Serial TRANSFER, previously only Inbound Serial TRANSFER was supported. 2. SERIAL32 driver. SERIAL32 driver occasionally left threads open if ON INTR was in use when HTBasic was closed. Under NT, this was seen and closed using the Task Manager. Under other versions, you had to re-boot. This has been repaired. 3. Dithering was added to provide better color representation when using only 256 colors in a system that supports more than 256 colors. This feature is enabled by default and can be modified with the following CONTROL statements. CONTROL crt,110;1 ! turn dithering off CONTROL crt,110;0 ! turn dithering on - default If the system does not support the use of dithering, solid colors will be used despite these settings. 4. The keyword QUIT can now be used to close just the Child Window or the entire HTBasic application. By default its behavior is to close only the Child Window. This can be modified with the following CONTROL statements. CONTROL KBD,210;1 ! closes entire application CONTROL KBD,210;0 ! closes only child window - default 5. Using the SEND keyword with the DATA command and the GPIBNI driver to send low level data across the bus is now allowed. 6. GPIBNI driver was updated to 1.6 version of NI API. 7. CLR/IO On WinNT with the HPIBS driver is not supported. The driver appears to hang when it is communicating with the SICL part of the driver and does not come back to check if a CLR/IO has been issued. It is recommended that ON TIMEOUT is utilitized instead. 8. SET ECHO and scrolling causes HTBasic to slow down. Control register KBD 207 was added to allow dynamic thread priority setting. With the thread priority set to NORMAL, (i.e. 0) graphics will run quicker. If the user needs the ON KNOB or ON CYCLE to work properly, he should set KBD 207 to 3. This maps to THREAD_PRIORITY_TIME_CRITICAL. This will give the mouse better response time, but will compromise graphics speed. 9. DISP and INPUT now properly display Japanese fonts. 10. DISP character control. DISP CHR$(129)&"Hello"&CHR$(128) now works properly. 11. Middle mouse was not responding with READ LOCATOR. This has been fixed. 12. The -alt command line switch does not accept long file name format if there is a space in the filename. Release 7.2 now allows the user to put quote marks around the whole file name so the operating system doesnÆt break up the filename. 13. The Help About box now reflects the release version. This can also be accomplished by using the SYSTEM$ ("VERSION:HTB"). 14. Swedish and Italian keyboards are not picking up the backslash key properly. The right alt+- key gives inverse "k" and $ but should have given a backslash "\". Adding -gkey to the command line parameter will enable this functionality. NOTE: alt +GR is the right alt key. 15. Running multiple instances of HTBasic required ENTER to be pressed multiple times to parse lines. This was corrected to prevent any interaction between multiple instances of HTBasic. 16. Changing ALPHA PEN now resets both the PRINT PEN and the KEY LABELS PEN. 17. SYSTEM$ ("PLOTTER IS ") returned a 6 for CRT when PLOTTER IS was set to a file. It now properly returns the filename. 18. When the program is waiting for a mouse click, using the STOP icon would hang the program or closing the child window without closing the parent window would require a re-boot. These were corrected so that no other interaction from the user is permitted while waiting for a response from the mouse. 19. Recent File list did not reset a second instance of HTBasic. This is now corrected so that the recent file list is shared between instances of HTBasic. 20. Loading a PROG type program from an older version would begin re-numbering line 655536 at 1. This has been corrected so that loading older PROG type programs will read in all linenumbers without re-numbering. 21. The -geometry command line switch for values less than 100 is now supported. If the values are less than 100 they are now interpreted as characters rather than as pixels. 22. Open no longer overwrites the program you are opening with the program in memory if Cancel is selected on Save/Store changed program dialog. **************Release 7.0 to Release 7.1************** 1. The TransEra Model 600 GPIO, HP E2075 GPIO cards, and the TAMS 60622 GPIO cards are supported by the 7.1 release. The GPIOS driver is supported under all Operating Systems, and the GPIO driver, supporting the TransEra Model 600 GPIO card, is supported under Windows 95/98 only. The TransEra Model 650 card will have support in future releases. 2. In addition to the new GUI (Graphics User Interface) look and feel of version 7.1, we have also provided a version of 7.1 that is familiar to users of earlier versions of HTBasic. This executable is installed along with your full GUI version. It is called HTBwin.bak. By renaming this executable to HTBwin2.exe you will have full access to the older look and feel. It contains all fixes and enhancements that the GUI version does except the SEPARATE ALPHA functionality and the new GUI functionality. 3. At the current time there is limited BASIC Plus support for the 7.1 release. To use BASIC Plus, it is required that you use the Non-GUI version as mentioned in item 3 above. 4. By default the Program Modified Dialog Box is enabled. To disable this dialog box insert the following line into your AUTOST: CONTROL KBD,100;0 With the release of 7.1, programmatic program changes will not cause this dialog box to appear. 5. When placing alpha on top of previously drawn graphics while in SEPARATE ALPHA mode, the alpha will first black out the line where it is to place the text prior to placing the text. This has been repaired for the 7.1 release. 6. Under Windows 95, it was not possible to print to the default Windows printer unless it was connected directly to a physical port or mapped to a network port. If your printer was mapped only to a network printer without being assigned a port number, error 401 would occur. This has been repaired to allow printing to non-mapped printers. 7. Changing the printer in the Printer Setup dialog box from within HTBasic would not change the Windows printer mapped to ISC 10. It would remain assigned to your default Windows printer. This has been repaired to allow for changing the assigned printer to ISC 10. 8. LIF utilities (HPCOPY, HPCAT, and HPPURGE) remain non-functional under Windows NT. Under DOS, or Windows 3.x, or 95/98 they are fully functional. If you have an NT machine, it is recommended that you either 1) boot to previous version of DOS to perform the necessary transfer; 2) Boot to a DOS boot disk and perform the necessary transfer, or 3) purchase a third party transfer utility. 9. Updated HPIBS (SICL) device driver for GPIB Cards. This driver has a repair that allows large data transfers using OUTPUT and ENTER statements. 10. When using SICL GPIB devices, timeouts were not functional. Previously the following program would never timeout. This has been repaired to give full functionality. 5 LOAD BIN "HPIBS;TIMEOUT 1" 10 ON TIMEOUT 7,1 GOTO Timetrap 20 Testsub 30 STOP 35 ! 40 Timetrap: PRINT "TIMEOUT - MAIN" 50 END 55 ! 60 SUB Testsub 70 ON ERROR GOTO Errtrap 80 ENTER 700;A$ ! No Instrument @ 700 Address 90 PRINT "No Timeout" ! This message shouldn't be printed 100 SUBEXIT 110 Errtrap: PRINT "Sub ERROR : ["&ERRM$&"]" 120 SUBEND 11. GPIB support in the 7.1 release is limited to the following three drivers: HPIBS, GPIBNI, and GPIB. Users with older cards that use the NAT488.1 standard will need to upgrade their hardware to the newer 488.2 or SICL standard, or continue using the 6.1 version. 12. DUMP ALPHA and DUMP GRAPHICS will now DUMP each plane separately with each DUMP DEVICE. Previously this was only supported by WIN-DUMP. 13. When using Lexical order files, some buttons on the control toolbar were rendered non-functional. This has been corrected, allowing full use of Lexical order files. 14. The SCRATCH ALL command now will reset the MSI to startup directory. Previously it had no effect on the MSI. 15. The GRAY option previously had no effect on the PS-DUMP driver. This has been corrected to allow GRAY scale PostScript DUMPs. 16. The INPUT command was previously limited to 63 characters. This has been increased to now handle up to 256 characters. 17. The CAT command when used with CONFIGURE LONGFILENAMES ON switch, will report year data in the yyyy format. The CONFIGURE LONGFILENAMES ON is on by default. 18. The following GESCAPE CRT codes have been added for manipulation of the program window. 46 Turn the Toolbar Off. 47 Turn Toolbar On. 48 Turn Status Bar Off. 49 Turn Status Bar On. 50 Remove Main Menu. 52 Disable Borders on Parent Window. 53 Enable Borders on Parent Window. 54 Disable Minimize button on Parent Window. 55 Enable Minimize button on Parent Window. 56 Disable Maximize button on Parent Window. 57 Enable Maximize button on Parent Window. 58 Disable Close button on Parent Window. 59 Enable Close button on Parent Window. 19. The following GESCAPE CRT codes have been added for manipulation of the program child window. 130 Maximize the window. 131 Hide the window. 132 Restore the window. 135 Bring the window to the top. 137 Returns the Title Bar enable flag. 138 Hide / Restore the Title Bar. 141 Minimize the window. 152 Disable Borders on Parent Window. 153 Enable Borders on Parent Window. 20. The following KBD Control Register code has been added for directory CAT control: 204 Toggles directory file count during CAT. 0 - files are counted. 1- directories report 0 files. 21. The following KBD Control Register codes have been added for ON KBD and mouse interaction: 203 Mouse movement interaction with ON KBD$. 0 - Allows interaction. 1 - Disallows interaction. 205 Mouse click interaction with ON KBD$. 0 - Allows interaction . 1 - Disallows interaction. 22. On-line help is now displayed in new Windows 2000 style. **************Release 6.1 to Release 6.1b************** 1. PCL.DW6 -Updated PCL driver, this driver now correctly states its version number. 2. GPIBNI.DW6 -Updated GPIB driver for National Instruments GPIB cards. This 32-bit only driver now supports all GPIB boards supported by National Instruments. This includes the plus "+" cards (cards with built-in bus analyzers) that were previously unsupported. 3. HPIBS.DW6 -Updated HPIBS (SICL) device driver for GPIB Cards. This driver has a repair that allows large data transfers using OUTPUT and ENTER statements. 4. The addition of movement of the mouse generating ON KBD interrupts placing UP, DOWN, LEFT, or RIGHT keystrokes into the KBD$ buffer. Previously the mouse movements were ignored by the ON KBD statement. In the 6.1a update we have added a control register to turn off this functionality. The syntax is as follows: CONTROL KBD,203;0 ! default, mouse will give KBD interrupts CONTROL KBD,203;1 ! turns off mouse interrupts to KBS$ 5. There was a problem introduced with the 6.1 release concerning the graphics area surrounding the Softkeys. Despite the presence or absence of the softkeys, graphics would not be displayed in this region. This is fixed in the 6.1a update. 6. The WAIT OFF option for the EXECUTE command has been added. Using this option will cause DOS applications to return control to BASIC without waiting for user intervention. Not specifying this switch when using an EXECUTE statement with a DOS application will cause the DOS program to wait with a "press any key to continue" prompt. When the Windows application is closed no DOS box will appear when using the WAIT OFF option. To prevent a DOS box from appearing at all, use the following syntax: EXECUTE CHR$(13)& "CALC". 7. CAT of an empty directory would leave null information. This has been repaired to give a blank display. **************Release 5.X to Release 6.1************** 1. Caps Lock control from inside HTBasic. The commands is CONTROL KBD,0;1 OR CHR$(255)&"U". The control statement uses the values 0 and 1 for on or off and the output CHR$(255)&"U" simply toggles the caps lock state. 10 CONTROL KBD,0;1 ! Turns on caps lock 20 CONTROL KBD,0;0 ! Turns off caps lock 30 OUTPUT KBD; CHR$(255)&"U" ! Toggles caps lock 40 END 2. CAT of an invalid filename, or non-existent directory or file would not generate an error, just an empty listing. Programs that used CAT to test the validity of a filename may have been rewritten to use ASSIGN to test for a file. CAT of invalid filename or non-existent directory now generates error 56 "File or path not found" in these cases. 3. On Win3.x or WinNT, CAT "*." listed only the files that have no extensions. On Win95, it listed all files. CAT "*." has been fixed to only list directories and files with out extensions on all platforms. 4. Full UNC (Universal Naming Convention) support added. 5. Colors customized through CRT control registers 15, 16, and 17 were reset to default whenever the HTBasic window was resized. These registers are fixed to retain their settings despite window resizing. 6. CONFIGURE MSI failed if string length exceeded 30 characters. This has been fixed to allow 256 characters in the statement. Note: It is still necessary to include the last \ in the PC path statement. 7. ISC 26 was limited to ports lpt1-3. This has been repaired to now allow assigning the ISC to any valid port. This may be network mapped, or physical. The syntax to control which port ISC 26 is assigned to is: "CONTROL 26,102;X" to assign it to lptX. 8. In HP RMB, a sub that performs a DELSUB on a range of Subs including itself, will succeed in deleting all the following subs, though it would error out when it tried to delete itself. Under HTBasic for Windows, it would error out, without deleting any subs. This functionality has been repaired to match the workstation's behavior exactly. 9. DOS error 21 on Win3.x. This was a hardware problem when using more than 32MB of RAM when running older versions of WIN32s. This has been fixed with this release by mandating an update of WIN32s to version 1.30c during installation. 10. EXPANDED option was not working correctly using ISC26 and the PCL driver (every other line was inverted). This now dumps properly. Syntax for this option is: CONFIGURE DUMP TO "PCL" & DUMP DEVICE IS 26. 11. When Windows is set to more than 256 colors or more than 1024x768 GLOAD generates a missing option or configuration error during screen captures and restores . This was corrected by the implementation of DirectDraw extensions. This is only available in 32-bit windows. To enable DirectDraw extensions, place the -X option on the startup line of your HTBasic start icon. To install this version, select custom install and select the directX enabled version. This will install htbwinx.exe. Your shortcuts will point to this new executable. 12. The exclamation mark was not interpreted as a comment delimiter when typed at the end of an IMAGE line. IMAGE codes like "-" or "#" were still interpreted by the IMAGE statement, even after the exclamation mark. This has been fixed to always interpret the ! as a comment indicator. 10 FOR N=1 TO 10 20 PRINT "------------------------------ !" 30 PRINT USING Toto;"Hello",N 40 Toto: IMAGE "IMAGE 1 [",5A,"]",3D 50 PRINT USING Toto1;"Hello",N 60 Toto1: IMAGE "IMAGE 2 [",5A,"]",3D !-comment 70 PRINT USING Toto2;"Hello",N 80 Toto2: IMAGE "IMAGE 3 [",5A,"]",3D !#comment 90 PRINT "------------------------------ ?" 100 NEXT N 110 END 13. WIN-DUMP driver gave ERROR 2 when using large complex Windows printer drivers. This was fixed with the same DirectDraw as in number 11 (eleven) above. 14. Values between x.x495" and "x.x500" are rounded up instead of down. For example: DROUND (12.3499,3) returned 12.4. This was repaired to give accurate rounding. 15. Negative pen numbers were not operational prior to release 6.x. Negative pen numbers have been implemented and are useful in erasing positive pen graphics. However, negative pens should only be drawn over their positive counterparts. Unexpected output may occur if mixing pen numbers. 16. Unless an ON KNOB definition is active, movement of the mouse generates ON KBD interrupts and places UP, DOWN, LEFT, or RIGHT keystrokes into the KBD$ buffer. Previously the mouse movements were ignored by the ON KBD statement. 17. PRINTALL IS would not work properly unless you did a PRINTER IS to the same device first. PRINTALL IS now works independent of PRINTER IS. 18. CAT command when using NFS drives give MEMORY OVERFLOW. This has been repaired to allow for all NFS drive mapping. 19. WIN-DUMP INVERT would not INVERT properly. It has been repaired to properly INVERT DUMPED output. This only works if colors are 256 or less. For example: 10 CONFIGURE DUMP TO "WIN-DUMP" !INVERT IS ON BY DEFAULT 15 !CONFIGURE DUMP TO "WIN-DUMP;INVERT" ! TURNS OFF INVERT 20 MOVE 50,50 30 RECTANGLE 10,10,FILL 40 DUMP GRAPHICS 50 END 20. XREF with large files and long variable names: 40,000 lines, numbered by 10. EDIT line 132040 would cause GPF as well as every 8960 lines. This has been repaired to allow the longer variable names in XREF and to use line number 132040. 21. XREF with lines longer than 80 characters caused formatting problems. This has been repaired to allow for up to 256 character long lines. 22. Month input is now allowed for both three-character abbreviations as well as spelled out. For example: 10 PRINT DATE$(DATE("10 FEB 1998")) ! Works fine. 20 PRINT DATE$(DATE("10 FEBRUARY 1998"))! Reported year as 0 30 PRINT DATE$(DATE("10 MARCH 1998")) ! Reported year as 0 40 END 23. The MAT statement did not allow assigning elements of a two-dimensional array to a one-dimensional array, such as the following. This has been repaired to match Workstation BASIC. 10 ALLOCATE Tab1(1:5) 20 ALLOCATE Tab2(1:5,1:5) 30 MAT Tab1= (5) 40 MAT Tab2= (6) 50 CALL Tab1d_2d(Tab1(*)) 60 CALL Tab1d_2d(Tab2(*)) 70 END 80 ! 100 SUB Tab1d_2d(Tabx(*)) 110 ALLOCATE Tab(1:10) 120 IF RANK(Tabx)=1 THEN MAT Tab(2:4)= Tabx(1:3) 130 IF RANK(Tabx)=2 THEN MAT Tab(2:4)= Tabx(2,2:4) 140 ! <-> Here was Error 16 150 SUBEND 24. The GPIBTNT driver had timeout problems under NT 4.0. This driver has changed names from GPIBTNT to GPIBNI. This driver is a 32-bit driver only for Windows 95/98 & NT. It currently supports under Windows 95/98 all of the NI GPIB boards except the plus "+" cards with the built-in bus analyzer. Under NT it supports all of the NI GPIB boards, except the GPIB PCI and the GPIB+ cards, with the built-in bus analyzer. If your card supports hardware timeouts specify "TIMEOUT 0" in LOAD BIN to disable software timeouts and use "CONTROL ISC,100;V" to set hardware timeout value to V. See your Hardware documentation for these values and their meaning. If you wish to use software timeouts set V to 0 and see "If your card does not support hardware timeouts:" Timeout value n is ignored in "ON TIMEOUT n GOTO linenumber" If your card does not support hardware timeouts software timeouts are enabled by default, but you may specify "TIMEOUT 0" in the LOAD BIN statement. Timeout value n in: "ON TIMEOUT n GOTO line number" is the value used for the timeout value in seconds. It is possible to enable both software and hardware timeouts. If this is done the timeout value is approximately the sum of the two timeout values. In some circumstances the timeout value will be unpredictable. 25. Using an EXECUTE statement while the SERIAL32 driver is loaded will no longer reset the serial interface to its default settings. If a program expects the serial interface to be reset to these defaults it is now necessary to perform a RESET X where X is the ISC of the serial port you wish to re-set. 26. When changing the baud rate in the SERIAL32 driver the parity would reset to default. The baud rate no longer effects the parity in this manner. 27. DUMP DEVICE IS <file> should not allow dumping to LIF ASCII file type, it should cause error 58. Previously this would not generate an error. 28. DUMP DEVICE IS <bdat file> would delete the bdat header first and then dump screen contents to the bdat file. This has been repaired to retain the bdat header information. If you want a file of just the screen dump, which is a bitmap file, use a different file type to DUMP to. 29. If PLOTTER IS <file> file began with the numeral "1" when using SYSTEM$ ("PLOTTER IS") would return a "6". This has been repaired to return the whole file name. 30. ON TIMEOUT support was added for ISC 10 and printing. 31. PRINTER IS cannot be set to a LIF ASCII file. Doing so will result in error 58 and will not assign the PRINTER IS to the file. This previously resulted in the error message but the file would remain assigned and the file would fill with unrecognizable characters. HTBasic Differences ----------------------------------------------------- This section lists the most common differences between HTBasic for Windows and HP BASIC 200/300/400/700 (RMB). For detailed information on differences and porting issues, see online help, the "Installing and Using Guide," and the "User's Manual" chapter 2. Specifically note the CONFIGURE statements. * To transfer BASIC programs between HTBasic and RMB use the SAVE/GET commands. PROG files cannot be directly shared between HTBasic for Windows and RMB. * Use SYSTEM$("VERSION:HTB") to programmatically determine if executing on HTBasic for Windows. * In the HTBasic editor, results from directly executed commands are displayed in the message line at the bottom of the screen. * Operations which cause an error may not produce exactly the same error number as RMB. For example, if an out-of-range value is passed to an INTEGER parameter, one platform might report error 19 (value out of range) and the other platform might report error 20 (integer overflow). * The PRT printer address constant returns 10 (the ISC of the Windows Print Manager Driver) instead of 701. Use CONFIGURE PRT TO 701 to change. * Refer to either online help "keyboard functions" or the "Installing and Using Guide" chapter 8 for the mapping of keyboard functions. You can use CONFIGURE KEY to re-map any key to the function you wish. * RMB uses the Roman-8 character set; HTBasic uses the Latin-1 character set. Therefore, characters below CHR$(32) and above CHR$(128) display differently. Refer to Chapter 13 in the "User's Manual". * RMB and HTBasic have different actions for negative pen numbers. Depending upon the device and drawing mode, RMB negative pens either erase or complement the corresponding color. In HTBasic, a negative pen complements the color map index, which is not the same as complementing the color. * HTBasic restarts a line-type pattern with each line segment drawn. RMB tries to continue the line-type pattern across sequential line segments. * The destination of an ON...CALL statement can be deleted in HTBasic. In RMB, attempts to delete these SUBs cause an error. * When doing a CAT TO S$(*) with HTBasic, the first array element has the text "DIRECTORY:" before the actual directory name. * RMB reserves 3072 bytes for softkey macros, HTBasic only allocates 1024 bytes for this purpose. * I/O Differences: - TRANSFER has limited functionality in this release. For more information, see the io_info.txt file. - Some error- and EOF-handling in the ENTER statement is different. * Mass Storage Differences: - Filename wildcards are only available through the CAT statement. - INITIALIZE is not supported, so HTBasic cannot create RAM volumes. For RAM volumes, use a DOS RAM disc program instead (e.g. VDISK.SYS, RAMDISK.SYS). These volumes are accessed just like any other DOS disk (e.g. C:, F:, etc.). - There can be differences in file formats and byte ordering within files. See the ASSIGN statement in the "Reference Manual" for more information. * MSUS Format: RMB format: [directory path] [filename] [:msus] HTBasic format: [drive:] [directory path] [filename] You can map the RMB format to the HTBasic model using the CONFIGURE MSI statement. * The following RMB CSUB utilities are not provided: PHYREC: No substitute GDUMPC: Automatically provided by DUMP GRAPHICS if current Windows printer supports color. BPLOT: Bload() and Bstore() functionality now provided through extensions to the GLOAD and GSTORE statements. * Blinking PRINT Attribute is not supported. LIMITATIONS ----------------------------------------------------- Due to the resolution of the PC clock (about 55 milliseconds), all timing functions (WAIT, ON CYCLE, ON DELAY, ON TIME, ON TIMEOUT, etc.) will be rounded to the nearest clock interval. The LINE TYPEs supported by this release are limited. Line type 3 is drawn the same as 4, and 6 is drawn the same as 7. The optional repeat length is not supported on the display. Also, not all display systems support dotted or dashed lines. In this case, dotted and/or dashed line types are drawn as solid lines. HTBasic cannot directly access LIF diskettes. Use the HPCAT, HPCOPY, and HPPURGE utilities provided with the product. These utilities are presently not supported under the Windows NT operation system. HTBasic does not support running more than one instance of HTBwin at one time on Windows 3.1x. (This is supported on 32-bit Windows.) The SET and RETURN clauses of the ASSIGN, DIALOG, CONTROL, and STATUS statements are limited to 36 attribute pairs. The HP 82335 HP-IB interface is a memory-mapped device. As such, it may have collisions with your expanded memory space. In Windows 3.1x, recursive function calls (DEF FNxxx) can overflow the stack and cause HTBasic and/or Windows to crash. When plotted labels are rotated with LDIR, isotropic scaling of the label may not be maintained on some plotting devices. If you attempt to CAT a networked directory containing a file named "CON", HTBasic will hang.