Hallo allemaal, > It could be that the FDC processors memory space was exceeded. Itīs > a 6504 with 8k only I think. > Otherwise I only know of add-on boards where the 6530 is replaced > by a 6532, with an EPROM for the 1k ROM missing in the 6532. > I only will write my message in English if you don't mind, Andre :) The 8250 has two 6502's, so the 8K-limit is no problem. You were talking about the 8250, so I presume you're talking about the one with the big drives. I gave mine away due to lack of room but I still have the MB of one whose drives were damaged by moist during (too) long storage. This one has an 901885-04 indeed. But I also have an 8250LP, with the small drives, and this one has a piggy-back print which replaces the original IC. This print contains a 901885-04. a 74LS04 and a 2736-EPROM. Onboard is also the possebility to choose a 2716. I hope the above info adds something to the discussion but I merely think I only mistify things more. Groetjes, Ruud - 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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