home *** CD-ROM | disk | FTP | other *** search
- CHAPTER 14 RELEASE HISTORY OF A86 14-1
-
-
- V2.10 June 1986. Initial public release of the MSDOS version of
- A86. The last previous version ran under the Xenix
- operating system on the Altos series of computers.
- Upgrades from that previous version included:
-
- * cleaning up the command invocation to allow default
- output files
- * insertion of full error messages, not just number codes
- * automatic removal of error messages upon reassembly
- * addition of features for compatibility with Microsoft's
- assembler (PTR, LABEL, PROC, etc.)
- * provision for ignoring certain keywords, for
- compatibility (ASSUME, PAGE, SUBTTL, PUBLIC, EXTRN,
- etc.)
-
- V2.11 June 1986. A very slight upgrade. The RADIX command was
- added, a couple of minor bugs were fixed, and formfeeds
- were put into the documentation.
-
- V2.12 Test release for Alan Tschetter and Charlotte Wood
-
- V2.13 July 1986. Quick-fix release for a user who wanted A86 to
- run on his 256K machine. I had foolishly assumed that
- everyone had 512K by now. This release erroneously
- mentions a "-s" option in the blurb that you get when you
- type "a86" by itself. No such option exists; I realized
- that the small-memory adjustment could be made
- automatically; and I forgot to remove the message.
-
- V2.14 Test release for Andy Harrington
-
- V2.15 August 1986. Implemented COMMENT directive for
- compatibility; added floating-point instruction set and DQ
- and DT directives; fixed bugs.
-
- V2.16 August 1986. Made internal changes to accommodate forward-
- referencing in D86's patch-memory mode.
-
- V2.17 Test release for Wang
-
- V2.18 November 1986. Fixed 3 bugs: (1) DB,DW,DD,DQ,DT
- directives in structures or the data segment caused a byte
- of memory to be written to the object buffer (or in short-
- memory systems, possibly to the source buffer). I have
- fixed this serious bug, and also rearranged things so that
- any future bugs of the same type cannot affect the source
- file. (2) "MOV AX,BX," -- the trailing comma was not
- flagged, and caused spurious extra code to be generated.
- (3) Named STRUC followed by unnamed ENDS did not work
- correctly.
-
- V2.90 March 1987. Test release for .OBJ support.
- 14-2
- V3.00 April 1987. Major upgrade:
- * added support for linkable .OBJ files
- * added pagination and indexing to manual
- * added long constants and floating-point constants
- * added A86LIB library tool and A86 support
- * added ability to forward-reference variables
- * added ability to add to and index forward references
- * added 286 protected-mode instructions
- * added NEC-specific instructions
- * added option not to insert errors in source
- * added option for long forward JMP for local labels
- * added switch for default decimal
- * added "=" equate compatibility feature
- * added double-quoted strings compatibility feature
- * underscores allowed within numbers
- * leading $ and ? allowed in symbols, for compatibility
- * parentheses no long required for most DUP right operands
- * less type-checking for pointer arithmetic; compatibility
- * numerous minor bug fixes
-
- V3.01 April 1987. Some bug fixes and minor enhancements:
- * original file had been renamed to no extension, not OLD
- * some forward-reference and OBJ operands didn't work
- * file name reporting in undefineds-list was sometimes off
- * wider display columns, for longer LIB source file names
- * segment overrides outlawed in 3-operand MOV
- * forward references outlawed in numeric-operand INC/DEC
- * add support for near jumps between OBJ segments
- * add "S" suppress-symtab and "C" case-sensitivity switches
-
- V3.02 May 1987. Some bug fixes:
- * Jc $+5 altered to be MASM-compatible
- * MOV B[1+BX],0 now works
- * fixed a serious bug: OBJ fixup records were not being
- generated in some multiple-segment modules
-
- V3.03 May 1987. Bug fixes:
- * A previous bug-fix had caused A86 to issue errors for
- MASM directives beginning with a period, that A86 should
- ignore. An embarrassing side-effect was that when this
- happened, all subsequent lines containing symbols had
- errors, as well! V3.03 fixes all this.
- * XREF did not recognize the double-quote mark for strings
- 14-3
-
- V3.04 May 1987. Bug fix: if a forward reference to a variable
- had an indexing register as well, then the indexing
- register became part of the definition of the variable,
- and appeared in subsequent usages of the variable, even
- when not explicitly given.
-
- V3.05 June 1987. Fixed a couple more OBJ bugs, and added the
- following features for MASM compatibility:
- * recognition of SEGMENT AT in non-OMF mode
- * ignore END directive in non-OMF mode
-
- V3.06 July 1987. Test release for Don Gilbert.
-
- V3.07 July 1987. Fixed bugs and added features necessary for
- Turbo C support (+c, +f, +F switches; ignore DGROUP:).
- Generalized the environment variable to include macro
- files. Added the ampersand feature. Made = compatible
- with MASM.
-
- V3.08 July 1987. Bug fix: the ST operand for floating-point
- instructions didn't work.
-
- V3.09 August 1987. Legalized MOV segreg,immediate. Duplicated
- MASM functionality for case-sensitive mode (A86's +C
- switch). Added ability to make aliasing EQU to an
- external name. Made FAKE.EXE into an honest EXE file,
- instead of a COM masquearading as EXE.
-
-
-