On Tue, 24 Mar 1998, Howard Herman wrote: > As far as I know the C64 is the only computer to have its CP/M system on > ROM (in a plug-in cartridge), and everyone seems to agree that this > rendition was an utter failure. Nope, the C64's CP/M cartridge doesn't have any ROM, just the Z80 and a few chips that will perform address translation so that C64 addresses will be Z80 addresses + $1000. The Z80 boots from $0000, and it was much easier to load the Z80 code to $1000 than to $0000 (because of the 6510's two I/O registers at 0 and 1). The CP/M cartridge requires a boot disk. BTW, the C64 CP/M uses a different high-level format for the 1541 disk (constant amount of sectors per track, wasting lots of sectors). > Up until recently (and maybe even now) some fellow (cannot recall his name) > on the newsgroup, comp.os.cpm, was the keeper of CP/M system boot disks. > He would be the first person to contact for a boot disk, if you need one. The C64 and C128 CP/M boot disks are in http://www.funet.fi/pub/cbm/demodisks/, together with many Commodore test/demo disks. Marko
Archive generated by hypermail 2.1.1.