Hello Rob and Christian, yes, within the SFD's daugtherboard every CBM floppy drive RRIOT (6530) can be used as a replacement. This is because the address decoder logic is programmed the very same for all of Commodores CBM series floppy disk drives. If someone gets a hand on some superfluous such dautherboards, he might be able to repair even other CBM floppies, not only SFD ones. ALl that needs to be done is to place the correct ROM contents into the additional ROM. Womo Christian Dirks schrieb: > Hi Rob, > AFAIK any RRIOT from another CBM drive can be used with the daughterboard. > > Christian > > > Am 16.09.2012 21:00, schrieb Rob Clarke: >> Good evening Gentlemen, >> >> Tonights mini-project is repairing a second SFD-1001 which I've had on >> the 'to-do' list for 18 months now. The problem was quickly tracked to >> a failed RIOT chip. As this sits on a daughterboard with the external >> ROM, can any RRIOT chip from a CBM IEEE drive be used as a replacement? >> >> My understanding was that there were other aspects of the chip which >> were mask programmable to determine where the RAM and ROM were located >> in the address space, but were these ever different across the IEEE >> RRIOT chips? >> >> Cheers, >> >> Rob >> >> Message was sent through the cbm-hackers mailing list > > -- ------ to obtain more infos about me, look up the page ------ ------ http://www.wmsr.de | wm (at) wmsr (dot) de ------ Message was sent through the cbm-hackers mailing listReceived on 2012-09-16 23:00:05
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