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more Z80 work

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FeralChild64 committed 2020-12-20 11:28:42 +01:00
1 parent d32e3afc12
commit 6ced8b102a
10 files changed
+297 -138
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src/zvm_m65/z80_instr_load_16bit.s
+96
View File
@@ -2,3 +2,99 @@
;
; Z80 data load instructions, 16 bit
;
Z80_instr_C5: ; PUSH BC
lda REG_BC+1
jsr (VEC_store_stack)
lda REG_BC+0
jsr (VEC_store_stack)
jmp ZVM_next
Z80_instr_D5: ; PUSH DE
lda REG_DE+1
jsr (VEC_store_stack)
lda REG_DE+0
jsr (VEC_store_stack)
jmp ZVM_next
Z80_instr_E5: ; PUSH HL
lda REG_HL+1
jsr (VEC_store_stack)
lda REG_HL+0
jsr (VEC_store_stack)
jmp ZVM_next
Z80_instr_F5: ; PUSH AF
lda REG_AF+1
jsr (VEC_store_stack)
lda REG_AF+0
jsr (VEC_store_stack)
jmp ZVM_next
Z80_instr_DD_E5: ; PUSH IX
lda REG_IX+1
jsr (VEC_store_stack)
lda REG_IX+0
jsr (VEC_store_stack)
jmp ZVM_next
Z80_instr_FD_E5: ; PUSH IY
lda REG_IY+1
jsr (VEC_store_stack)
lda REG_IY+0
jsr (VEC_store_stack)
jmp ZVM_next
Z80_instr_C1: ; POP BC
jsr (VEC_fetch_stack)
sta REG_BC+0
jsr (VEC_fetch_stack)
lda REG_BC+1
jmp ZVM_next
Z80_instr_D1: ; POP DE
jsr (VEC_fetch_stack)
sta REG_DE+0
jsr (VEC_fetch_stack)
lda REG_DE+1
jmp ZVM_next
Z80_instr_E1: ; POP HL
jsr (VEC_fetch_stack)
sta REG_HL+0
jsr (VEC_fetch_stack)
lda REG_HL+1
jmp ZVM_next
Z80_instr_F1: ; POP AF
jsr (VEC_fetch_stack)
sta REG_AF+0
jsr (VEC_fetch_stack)
lda REG_AF+1
jmp ZVM_next
Z80_instr_DD_E1: ; POP IX
jsr (VEC_fetch_stack)
sta REG_IX+0
jsr (VEC_fetch_stack)
lda REG_IX+1
jmp ZVM_next
Z80_instr_FD_E1: ; POP IY
jsr (VEC_fetch_stack)
sta REG_IY+0
jsr (VEC_fetch_stack)
lda REG_IY+1
jmp ZVM_next