From: Marko Mäkelä (marko.makela_at_hut.fi)
Date: 2006-06-26 22:11:38
On Sun, Jun 25, 2006 at 06:32:16PM +0200, firstname.lastname@example.org wrote: > If I POKE from 0 to 2047 I can PEEK back the right value but above 2047 I > get wrong values back. If I remember correctly, the B series machines have 2k of RAM in the system bank ($0 or $f), depending on the model. Try BANK 1 before PEEKing or POKEing; that should give you RAM at positions 2..65535. > Is this a problem with the RAM chips or with the MUX (4 x 74S153). It could be the RAM chips in the "variables" bank or the MUX. Again if I remember correctly, the BASIC program text is in the first all-RAM bank at 3..65535, and variables are kept in another bank. I only have a CBM 720, and I only used it to implement the cbmlink transfer routines for it, some three years ago. Marko http://www.iki.fi/~msmakela/8bit/ Message was sent through the cbm-hackers mailing list
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