From: Marko Mäkelä (marko.makela_at_hut.fi)
Date: 2003-02-16 17:20:57
On Sun, Feb 16, 2003 at 08:15:39AM -0800, Cameron Kaiser wrote: > Store 252 in the register and see if it stays there. If it's a real 64, it > will still read 255; if it's a 128, it will change back. Good idea, and it's only 3 bytes longer than the original suggestion. If you are reluctant to do that, you could also do a 6-byte test: ldx $d030:inx:beq c64. Your idea takes 10 bytes: lda #$fc:sta$d030:eor$d030:beq c128. Both snippets leave the carry flag intact. Marko Message was sent through the cbm-hackers mailing list
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