ld hl, 32768 ; start of 32K RAM area (for 48K) ld de, 32769 ld bc, 32768-1 ld (hl), $FF ldir ; fill with $FF ; ... then verify and repeat with $00, $AA, $55
#ZXSpectrum #RetroComputing #Z80 #Diagnostics #Homebrew zx spectrum test program
Should I add a ULA snow test or an AY-3-8910 sound check next? Anyone else have a favourite minimal test routine? ld hl, 32768 ; start of 32K RAM