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some more Z80 work

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FeralChild64 committed 2021-01-02 23:40:06 +01:00
1 parent 690b2b832d
commit c04f3bc1ff
13 files changed
+232 -219
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src/zvm_m65/,aliases_zvm.s
+17 -16
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@@ -52,30 +52,31 @@
!addr REG_R7 = $27 ; 1 byte - refresh counter, bit 7 (bits 0-6 are garbage)
!addr REG_I = $28 ; 1 byte - interrupt vector base
!addr z80_cpustate__end = $28
!addr BANK_ID = $29 ; 1 byte - currently selected memory bank
!addr BANK_ID = $29 ; 1 byte - currently selected bank
;
; BIOS vectors
;
!addr VEC_MOVE_fetch = $2A ; 2 bytes - vector to byte fetch routine, for BIOS routine MOVE
!addr VEC_MOVE_store = $2C ; 2 bytes - vector to byte store routine, for BIOS routine MOVE
!addr VEC_DISKIO_store = $2E ; 2 bytes - vector to byte store routine, for BIOS disk I/O operations
!addr z80_cpustate__end = $29
;
; Z80 emulation temporary area
;
!addr PTR_IXY_d = $30 ; 4 bytes - calculated address IX+d / IY+d XXX - review usage !!!
!addr PTR_DATA = $34 ; 4 bytes - calculated data source address XXX - review usage !!! also check functions using ZVM_store_next
!addr ADDR_IO = $38 ; 4 bytes - address for fetching/storing the IO
!addr PTR_IXY_d = $2A ; 4 bytes - calculated address IX+d / IY+d
!addr PTR_DATA = $2E ; 4 bytes - calculated data source address
!addr ADDR_IO = $32 ; 2 bytes - address for fetching/storing the IO
!addr REG_TMP1 = $3C ; 1 byte - emulation-specific temporary storage
!addr REG_TMP2 = $3D ; 1 byte - emulation-specific temporary storage
!addr REG_TMP1 = $34 ; 1 byte - emulation-specific temporary storage
!addr REG_TMP2 = $35 ; 1 byte - emulation-specific temporary storage
; $3E ; 2 bytes - reserved
; $36 ; for now free till $3F (inclusive)
;
; BIOS data
;
!addr VEC_MOVE_fetch = $40 ; 2 bytes - vector to byte fetch routine, for BIOS routine MOVE
!addr VEC_MOVE_store = $42 ; 2 bytes - vector to byte store routine, for BIOS routine MOVE
!addr VEC_DISKIO_store = $44 ; 2 bytes - vector to byte store routine, for BIOS disk I/O operations
;
; Constant/macros definitions