Add Fairchild F8 processor module#9087
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polartape wants to merge 1 commit intoNationalSecurityAgency:masterfrom
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Add Fairchild F8 processor module#9087polartape wants to merge 1 commit intoNationalSecurityAgency:masterfrom
polartape wants to merge 1 commit intoNationalSecurityAgency:masterfrom
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ryanmkurtz
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Feature: Processor
Status: Triage
New processor module for the Fairchild F8 / Mostek MK3870 microprocessor family (1975). All 76 instructions implemented with full decompiler support. Variants with dedicated pspecs: - F3850: multi-chip CPU (programmable interrupt vectors) - MK3870/F3870: single-chip (Timer $020 + External $0A0 vectors) - MK3873: single-chip with serial port (5 interrupt vectors) Scratchpad (R0-R63) placed in dedicated ram_space for correct decompiler data-flow analysis through both direct and ISAR indirect addressing modes. Verified against F3850 CPU Datasheet, F8 Guide to Programming, F8 User's Guide, Mostek 1981 Data Book, and MAME F8 emulator. 256 pcode emulator assertions passing.
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Summary
New processor module for the Fairchild F8 / Mostek MK3870 microprocessor family (1975). Ghidra does not currently include F8 support.
Test plan
AI (Claude Code) was used to assist with verification, testing, and implementation.