On Tue, 5 Oct 1999, [ISO-8859-1] Marko Mäkelä wrote: > On Mon, 4 Oct 1999, Ethan Dicks wrote: > > > > I uploaded the ROMs, along with the technical reference manual (scanned) to > > > ftp://ftp.zimmers.net/temp/ > > > > Cool. Saves me the scanning. I'll check my various versions against what > > you've got there. > > The manual is now also available at > http://www.funet.fi/pub/cbm/schematics/drives/old/9090/. I did a quick > scan for strings in the firmware and didn't find much: only "blocks free." > in 300516-001. Your 2k chip dump (the one that was not $ff) was identical > with the one on Bo's site. 300515-001 differs from 300515-002 by more than the first byte. As you go through the code, other bytes are inserted in the -002 version. By the time you get to the end of the code, there is about a 20 byte offset. There is also additional code at the end of the -002 version. The -002 version is obviously a patched version of 300515-001. The 8280 2K ROM is nothing like these ROMs although they are all DOS 3.0 This suggests that that 8280 ROM image is not good. 300516-001 appears to be C000-DFFF. 300517-001 appears to be garbled. The manual says that the drive should produce a power-on message and also the usual Commodore DOS error messages. They should be in this ROM. Also, it makes no sense when disassembled. - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tcm.hut.fi.
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