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added BIOS skeleton

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FeralChild64 authored and FeralChild64 committed 2021-01-26 00:03:07 +01:00
1 parent 8de19d4be0
commit 7395fc3738
3 files changed
+230 -10
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src/zvm_m65/zvm_core.s
+2 -6
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@@ -41,8 +41,8 @@ ZVM_store_next:
asl
tax
bcs @1
jmp (.TAB_LO) ; execute opcode $00-$7F
@1: jmp (.TAB_HI) ; execute opcode $80-$FF
jmp (.TAB_LO,x) ; execute opcode $00-$7F
@1: jmp (.TAB_HI,x) ; execute opcode $80-$FF
}
@@ -114,14 +114,10 @@ Z80_instr_22: ; LD (nn),HL
Z80_instr_27: ; DAA
Z80_instr_29: ; ADD HL,HL
Z80_instr_2A: ; LD HL,(nn)
Z80_instr_2F: ; CPL
Z80_instr_31: ; LD SP,nn
Z80_instr_32: ; LD (nn),A
Z80_instr_37: ; SCF
Z80_instr_39: ; ADD HL,SP
Z80_instr_3A: ; LD A,(nn)
Z80_instr_3F: ; CCF
Z80_instr_76: ; HALT
Z80_instr_80: ; ADD A,B
Z80_instr_81: ; ADD A,C
Z80_instr_82: ; ADD A,D