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cc65/libsrc/sim6502/exehdr.s

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Added 'sim6502' and 'sim65C02' targets. The targets allow to run cc65 programs in the sim65 exection einvironment. As there are no "real" i/o facilities there's no need for header files. Paravirtualized entry points are mapped to $FFF0 ff. There's a large cc65 progam area from $0200-$FFEF. The binary format includes a one-byte header indicating the required execution environment: The value 0 means 6502 and the value 1 means 65C02. The load adress for the binary is fixed to $0200. Note: Running sim65C02 programs currently doesn't work bcause sim65 doesn't actually implement 65C02 opcodes.
2013-05-20 20:35:42 +02:00
;
; Oliver Schmidt, 2013-05-16
;
sim65 header comment fix
2019-05-29 16:32:44 -04:00
; This module supplies a header used by sim65.
Added 'sim6502' and 'sim65C02' targets. The targets allow to run cc65 programs in the sim65 exection einvironment. As there are no "real" i/o facilities there's no need for header files. Paravirtualized entry points are mapped to $FFF0 ff. There's a large cc65 progam area from $0200-$FFEF. The binary format includes a one-byte header indicating the required execution environment: The value 0 means 6502 and the value 1 means 65C02. The load adress for the binary is fixed to $0200. Note: Running sim65C02 programs currently doesn't work bcause sim65 doesn't actually implement 65C02 opcodes.
2013-05-20 20:35:42 +02:00
;
.export __EXEHDR__ : absolute = 1 ; Linker referenced
movable sp for sim65
2019-05-28 15:29:55 -04:00
.importzp sp
versionable header for sim65 load and run address now configured from header fix error codes not to conflict with test fix test/misc/endless.c which is supposed to fail if an endless loop does not occur
2019-05-29 16:04:54 -04:00
.import __MAIN_START__
Renamed program start label.
2019-05-30 00:06:31 +02:00
.import startup
Added 'sim6502' and 'sim65C02' targets. The targets allow to run cc65 programs in the sim65 exection einvironment. As there are no "real" i/o facilities there's no need for header files. Paravirtualized entry points are mapped to $FFF0 ff. There's a large cc65 progam area from $0200-$FFEF. The binary format includes a one-byte header indicating the required execution environment: The value 0 means 6502 and the value 1 means 65C02. The load adress for the binary is fixed to $0200. Note: Running sim65C02 programs currently doesn't work bcause sim65 doesn't actually implement 65C02 opcodes.
2013-05-20 20:35:42 +02:00
[SIM65] Support undocumented opcodes for 6502 This PR is mostly a complete rewrite of the emulator for 6502/65c02 opcodes. It provides an easier to maintain implementation of the instructions, by using few macros rather than having hand-written code for each function. All undocumented, previously missing opcodes for 6502 are also implemented. The patch also includes a detailed documentation of those opcodes, for reference to developers. This PR should fix one of the milestones listed here for the next version of CC65: https://github.com/cc65/wiki/wiki/Before-the-next-release
2024-01-04 13:12:52 +01:00
.macpack cpu
Added 'sim6502' and 'sim65C02' targets. The targets allow to run cc65 programs in the sim65 exection einvironment. As there are no "real" i/o facilities there's no need for header files. Paravirtualized entry points are mapped to $FFF0 ff. There's a large cc65 progam area from $0200-$FFEF. The binary format includes a one-byte header indicating the required execution environment: The value 0 means 6502 and the value 1 means 65C02. The load adress for the binary is fixed to $0200. Note: Running sim65C02 programs currently doesn't work bcause sim65 doesn't actually implement 65C02 opcodes.
2013-05-20 20:35:42 +02:00
.segment "EXEHDR"
versionable header for sim65 load and run address now configured from header fix error codes not to conflict with test fix test/misc/endless.c which is supposed to fail if an endless loop does not occur
2019-05-29 16:04:54 -04:00
.byte $73, $69, $6D, $36, $35 ; 'sim65'
.byte 2 ; header version
[SIM65] Support undocumented opcodes for 6502 This PR is mostly a complete rewrite of the emulator for 6502/65c02 opcodes. It provides an easier to maintain implementation of the instructions, by using few macros rather than having hand-written code for each function. All undocumented, previously missing opcodes for 6502 are also implemented. The patch also includes a detailed documentation of those opcodes, for reference to developers. This PR should fix one of the milestones listed here for the next version of CC65: https://github.com/cc65/wiki/wiki/Before-the-next-release
2024-01-04 13:12:52 +01:00
.if (.cpu .bitand ::CPU_ISET_6502X)
.byte 2
.elseif (.cpu .bitand ::CPU_ISET_65C02)
.byte 1
.elseif (.cpu .bitand ::CPU_ISET_6502)
.byte 0
.else
.error Unknow CPU type.
.endif
versionable header for sim65 load and run address now configured from header fix error codes not to conflict with test fix test/misc/endless.c which is supposed to fail if an endless loop does not occur
2019-05-29 16:04:54 -04:00
.byte sp ; sp address
.addr __MAIN_START__ ; load address
Renamed program start label.
2019-05-30 00:06:31 +02:00
.addr startup ; reset address
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