On 2011-10-29 01:37, Hoffmann-Vetter, Martin wrote: > >> Just besides an EPROM labeled "Z8000 Fl. Cont. S41 6-20-85".... > > Can you dump the rom? That is the plan for next week - along with all the other roms > >> The EPROM, MOS 6508, MOS 8723 and some other nearby discrete >> components on the mainboard seems to constitute a separate floppy >> controller just as the external CBM drives are made. > > That's very interesting. So this was a modern SFD1001 without the ieee > interface? Did anyone know more about the floppy controller chip MOS 8723? > PS: The CBM-900 actually does have an external GPIB/IEEE-488 interface on its back side. > > What's the history from this C900? Is it a workstation or server model? > The short story is that it was never returned to Commodore for destruction upon request and hence survived at a local Danish consulting/engineering company. It appears to be a server model. Besides the GPIB/IEEE-488 the mainboard has two RS-232C's and one centronics parallel port on the back of the system. The "mezzanine" graphics card is marked "Z8000 LR DISPLAY BOARD" LR for Low Resolution and has a VDC 6845 chip on board and two additional RS-232C's. /Uffe Message was sent through the cbm-hackers mailing listReceived on 2011-10-29 01:00:03
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