I'm building a BIOS for a Z80 card to use a 32MB CF disk. I started with the CBIOSX.MAC from SIMH, since it's all I had on hand, and it's a running system. When building the DPBs, I have two options. I could create a DPB for each 8MB slice, adjusting the reserved track count to hide the DPB entries prior to the current one, or, I could use a single DPB for 8MB, and do the adjustment in the read/write routines based on the disk number. The former method would allow variable sized disk slices, but I can't particularly thing of a reason I'd want 8MB/6MB/8M kind of arrangement. The latter method uses few DPBs, but basically causes each slice to be of a uniform size. Can anyone make a good argument for one vs. the other? I'm inclined to handle it based on the disk number, but if I'm overlooking a good reason for individual DPBs, I'll switch to that. I've generated plenty of CP/M BIOS (many many years ago...), but never built one for a multiple logical drives on the same media. --jc

Thanks go to Al Kossow for having, at least, the sales brochures for these old items (1957!) re: http://www.bitsavers.org/pdf/dec/JPEGs/3000broch* http://www.bitsavers.org/pdf/dec/JPEGs/Jun60Brochure* If anyone has the actual system available, I could use a meter read out for the power pins (again). BTW these are also called the "Lab Modules" John A. ----- Original Message ----- Sent: Friday, November 21, 2003 10:34 AM Subject: DEC series 100 module info? (was: DEC M750 flipchip?) It's probably good to put out this request periodically. I happened across some of the earliest DEC modules, the 100 series, a couple of years ago and would like information on the pinouts (more "plugouts") on the back. I think they take -15v,+10v,+10v,-3v but I would like to see the documentation to find out which input goes where. Any information would be appreciated, thanks. John A.