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b04d79b1da
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
25 lines
922 B
Plaintext
25 lines
922 B
Plaintext
; CPU bitmask constants
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CPU_ISET_NONE = $0001
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CPU_ISET_6502 = $0002
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CPU_ISET_6502X = $0004
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CPU_ISET_6502DTV = $0008
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CPU_ISET_65SC02 = $0010
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CPU_ISET_65C02 = $0020
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CPU_ISET_65816 = $0040
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CPU_ISET_SWEET16 = $0080
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CPU_ISET_HUC6280 = $0100
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;CPU_ISET_M740 = $0200 not actually implemented
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CPU_ISET_4510 = $0400
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; CPU capabilities
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CPU_NONE = CPU_ISET_NONE
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CPU_6502 = CPU_ISET_6502
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CPU_6502X = CPU_ISET_6502|CPU_ISET_6502X
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CPU_6502DTV = CPU_ISET_6502|CPU_ISET_6502DTV
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CPU_65SC02 = CPU_ISET_6502|CPU_ISET_65SC02
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CPU_65C02 = CPU_ISET_6502|CPU_ISET_65SC02|CPU_ISET_65C02
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CPU_65816 = CPU_ISET_6502|CPU_ISET_65SC02|CPU_ISET_65816
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CPU_SWEET16 = CPU_ISET_SWEET16
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CPU_HUC6280 = CPU_ISET_6502|CPU_ISET_65SC02|CPU_ISET_65C02|CPU_ISET_HUC6280
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CPU_4510 = CPU_ISET_6502|CPU_ISET_65SC02|CPU_ISET_65C02|CPU_ISET_4510
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