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Changes - CPCWiki

Changes

Programming:Unlocking ASIC

53 bytes added, 14:51, 18 March 2025

/* In Z80 Assembler */

<pre>

UnlockAsic

di

ld bc,#BCFF

out (c),c

out (c),c

ld a,h:rlca:ld h,l:ld l,a

srl ~~c:res 3,~~cxor c:and #88or :xor c

ld c,a

cp #4D

jr nz,.loop

ld a,#CD ; a=#CD for unlock, another value for lock

out (c),a : out (c),a

ei

ret

</pre>

28

edits