On Thu, Oct 15, 2015 at 3:04 AM, Baltissen, GJPAA (Ruud) <email@example.com> wrote: > We are mainly talking about the 8-bitters. But I also tinker with PCs, the very old ones of course. And those include the Commodore ones. > > My questions: > > - Is anybody else on this list interested in the Commodore PCs? I have a Commodore PC-10 I need to repair - the NiCd battery leaked and I need to repair it (since I doubt I'll find a replacement mainboard easily). The damage is about 2cm x 5cm, so I'll have a number of passive components and a couple of ICs to remove before I can get into any trace repair. :-( > - If so, would anybody object discussing these PCs on this list? It seems not. By way of extending the discussion, I used to use this PC-10 to run my B&C Microsystems EPROM and GAL programmer. I put an 8-bit NIC in it and the proprietary parallel card for the device programmer. I used Kermit and its internal TCP/IP support (with a packet driver for my NIC) to get files into the machine. When the leaking battery killed the machine, I had to switch to a Compaq to burn my devices. I have to use an older machine with this programmer. There appear to be software timing loops that cause it not to function on anything faster than about a 16MHz 80286 (a 4.77-8Mhz 8088 is just fine). Even a 25Mhz 386 is "too fast". It must be something to do with how fast I/O bus accesses are when the ISA bus is _not_ directly connected to the CPU. I never investigated wait state or other options. It was just easier to keep an old machine working than investigate new machines. I do have the XT-IDE drive for mine, but I don't have a lot of spares, so when that disk drive dies, I'll probably have to switch to an ISA disk - fortunately, I have one or two 8-bit SCSI cards with boot ROMs, so I won't have to find a working MFM drive. -ethan Message was sent through the cbm-hackers mailing listReceived on 2015-10-15 15:00:08
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