From: André Fachat (afachat_at_gmx.de)
Date: 2007-03-19 19:23:27
> 1. I have a 4040 that when powered up the LEDs blink nine times. I > can't find a flash code table for the 4040 at zimmers.net, but for > the 8050 it says it is the Common RAM, $4000 - $43FF. Could this be > the same for the 4040? I would think so. (also just an educated guess based on the assumptions that they have similar DOS versions...) > 2. With a 2031, it powers up correctly but whenever you try to do any > disk access like get a directory or header a disk, the computer hangs > until I power off the 2031. I have already swapped the ROMs and the > 6522, but the problem still persists. I haven't swapped the > 75160 and/or 75161 yet. Could one of these be the problem and if > so which one should I swap first? I am trying to minimize any > desoldering/soldering... IIRC the 75161 is the control lines driver (ATN, NDAC, ...). This would be the one that would cause a hang. However, I'd rather measure the input/output signals to check what's wrong before unsoldering any other ICs. André -- "Feel free" - 10 GB Mailbox, 100 FreeSMS/Monat ... Jetzt GMX TopMail testen: www.gmx.net/de/go/mailfooter/topmail-out Message was sent through the cbm-hackers mailing list
Archive generated by hypermail pre-2.1.8.