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msbasic.s
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msbasic.s
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; Microsoft BASIC for 6502
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;
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; This is a single integrated assembly source tree that can generate any of seven different
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; versions of Microsoft BASIC for 6502.
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; (first revision of this distribution, 20 Oct 2008, Michael Steil www.pagetable.com)
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;
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; By running ./make.sh, this will generate all versions and compare them to the original
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; files byte by byte.
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; This is a single integrated assembly source tree that can generate seven different versions of
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; Microsoft BASIC for 6502.
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;
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; The CC65 compiler suite is need to build this project.
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; By running ./make.sh, this will generate all versions and compare them to the original files
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; byte by byte. The CC65 compiler suite is need to build this project.
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;
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; These are the first eight (knows) versions of Microsoft BASIC for 6502:
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; These are the first eight (known) versions of Microsoft BASIC for 6502:
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;
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; Name Release MS Version ROM 9digit INPUTBUFFER extensions comment
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; Name Release MS Version ROM 9digit INPUTBUFFER extensions .define
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;---------------------------------------------------------------------------------------------------
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; Commodore BASIC 1 1977 Y Y ZP CBM
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; OSI BASIC 1977 1.0 REV 3.2 Y N ZP - CONFIG_10A
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; Commodore BASIC 1, as used on the original PET is the oldest known version of Microsoft BASIC
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; for 6502. It contains some additions to Microsoft's version, like Commodore-style file I/O.
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;
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; The CONFIG_n defines specify what Microsoft-version the OEM version is based on.
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; The CONFIG_n defines specify what Microsoft-version the OEM version is based on. If CONFIG_2B
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; is defined, for example, CONFIG_2A, CONFIG_2, CONFIG_11A, CONFIG_11 and CONFIG_10A will be
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; defined as well, and all bugfixes up to version 2B will be enabled.
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;
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; The following symbols can be defined in addition:
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;
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; CONFIG_CBM1_PATCHES jump out into CBM1's binary patches instead of doing the right thing inline
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; CONFIG_CBM_ALL add all Commodore-specific additions except file I/O
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; CONFIG_DATAFLG ?
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@ -49,6 +53,16 @@
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; CONFIG_SAFE_NAMENOTFOUND check both bytes of the caller's address in NAMENOTFOUND
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; CONFIG_SCRTCH_ORDER where in the init code to call SCRTCH
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; CONFIG_SMALL use 6 digit FP instead of 9 digit, use 2 character error messages, don't have GET
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;
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; Changing symbol definitions can alter an existing base configuration, but it not guaranteed to assemble
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; or work correctly.
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;
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; Credits:
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; * main work by Michael Steil
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; * function names and all uppercase taken from Bob Sander-Cederlof's excellent AppleSoft II disassembly:
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; http://www.txbobsc.com/scsc/scdocumentor/
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; * Applesoft lite by Tom Greene http://cowgod.org/replica1/applesoft/ helped a lot, too.
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; * Thanks to Joe Zbicak for help with Intellision Keyboard BASIC
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.debuginfo +
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