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reidrac/disable-firmware-cpc.z80

Created June 28, 2019 20:38
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disable-firmware-cpc.z80
di
; disable the firmware
im 1
ld hl, #0x38
ld (hl), #0xfb
inc hl
ld (hl), #0xc9
; put the stack as high as we can
ld sp, #0xc000
ei
; disable upper/lower roms
ld bc, #0x7f8c
out (c), c
; your code here
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