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add some text to msbasic.s

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Michael Steil
2008-10-19 07:20:41 +00:00
parent d2cfe9ffc7
commit 2b91b483df
5 changed files with 52 additions and 39 deletions
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msbasic.s
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@@ -1,4 +1,54 @@
; Microsoft BASIC for 6502
;
; This is a single integrated assembly source tree that can generate any of seven different
; versions of Microsoft BASIC for 6502.
;
; By running ./make.sh, this will generate all versions and compare them to the original
; files byte by byte.
;
; The CC65 compiler suite is need to build this project.
;
; These are the first eight (knows) versions of Microsoft BASIC for 6502:
;
; Name Release MS Version ROM 9digit INPUTBUFFER extensions comment
;---------------------------------------------------------------------------------------------------
; Commodore BASIC 1 1977 Y Y ZP CBM
; OSI BASIC 1977 1.0 REV 3.2 Y N ZP - CONFIG_10A
; AppleSoft I 1977 1.1 N Y $0200 Apple CONFIG_11
; KIM BASIC 1977 1.1 N Y ZP - CONFIG_11A
; AppleSoft II 1978 Y Y $0200 Apple CONFIG_2
; Commodore BASIC 2 1979 Y Y $0200 CBM CONFIG_2A
; KBD BASIC 1980 Y N $0700 KBD CONFIG_2B
; MicroTAN 1980 Y Y ZP - CONFIG_2C
;
; (Note that this assembly source cannot (yet) build AppleSoft II.)
;
; This lists the versions in the order in which they were forked from the Microsoft source base.
; Commodore BASIC 1, as used on the original PET is the oldest known version of Microsoft BASIC
; for 6502. It contains some additions to Microsoft's version, like Commodore-style file I/O.
;
; The CONFIG_n defines specify what Microsoft-version the OEM version is based on.
; CONFIG_CBM1_PATCHES jump out into CBM1's binary patches instead of doing the right thing inline
; CONFIG_CBM_ALL add all Commodore-specific additions except file I/O
; CONFIG_DATAFLG ?
; CONFIG_EASTER_EGG include the CBM2 "MICROSOFT!" easter egg
; CONFIG_FILE support Commodore PRINT#, INPUT#, GET#, CMD
; CONFIG_IO_MSB all I/O has bit #7 set
; CONFIG_MONCOUT_DESTROYS_Y Y needs to be preserved when calling MONCOUT
; CONFIG_NO_CR terminal doesn't need explicit CRs on line ends
; CONFIG_NO_LINE_EDITING disable support for Microsoft-style "@", "_", BEL etc.
; CONFIG_NO_POKE don't support PEEK, POKE and WAIT
; CONFIG_NO_READ_Y_IS_ZERO_HACK don't do a ver volatile trick that saves one byte
; CONFIG_NULL support for the NULL statement
; CONFIG_PEEK_SAVE_LINNUM preserve LINNUM on a PEEK
; CONFIG_PRINTNULLS whether PRINTNULLS does anything
; CONFIG_PRINT_CR print CR when line end reached
; CONFIG_RAM optimizations for RAM version of BASIC, only use on 1.x
; CONFIG_ROR_WORKAROUND use workaround for buggy 6502s from 1975/1976; doesn't work with CONFIG_SMALL!
; CONFIG_SAFE_NAMENOTFOUND check both bytes of the caller's address in NAMENOTFOUND
; CONFIG_SCRTCH_ORDER where in the init code to call SCRTCH
; CONFIG_SMALL use 6 digit FP instead of 9 digit, use 2 character error messages, don't have GET
.debuginfo +