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safer loading code

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FeralChild64 committed 2021-01-30 17:25:35 +01:00
1 parent c6ed0f0d00
commit a9f3371772
1 file changed
+6 -2
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src/zvm_m65/zvm_cputest.s
+6 -2
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@@ -77,6 +77,8 @@ ZVM_cputest:
lda #$02 ; value means - 2*256 bytes read lda #$02 ; value means - 2*256 bytes read
pha pha
ldz #$00 ; in case hypervisor modified it
@loop2: @loop2:
pla pla
@@ -142,18 +144,20 @@ ZVM_cputest:
sta BIOS_LOADPTR+1 sta BIOS_LOADPTR+1
lda #$05 lda #$05
sta BIOS_LOADPTR+0 sta BIOS_LOADPTR+0
lda #$76 ; HALT lda #$76 ; HALT
sta [BIOS_LOADPTR],z sta [BIOS_LOADPTR],z
inc BIOS_LOADPTR inc BIOS_LOADPTR
lda #$FF lda #$FF
sta [BIOS_LOADPTR],z ; $FF = CP/M simulation for CPU test sta [BIOS_LOADPTR],z ; $FF = CP/M simulation for CPU test
; Run the software ; Run the software
ldz #$00 ; in case hypervisor modified it
jmp ZVM_next jmp ZVM_next
@end: @end:
ldz #$00 ; in case hypervisor modified it
rts rts
ZVM_filename_Z80TEST: ZVM_filename_Z80TEST: