From: Wolfgang Moser (womo_at_news.trikaliotis.net)
Date: 2008-08-18 16:43:45
Hello William,
William Levak schrieb:
>
> I have no information on part number 355640-01, but this series of part
> numbers was not in use at the time of the 1541-II, or even the 1541B and
> 1541C. As your compare shows, the contents are the same as the last
> version of the 1541/1541A/SX64. It is possible that this ROM was used
> in the first versions of the 1541B, which had a Newtronics drive.
>
> It is also possible that someone used it as a replacement in the
> 1541-II, since they are compatible and use the same drive mechanism.
>
> It would be interesting to know whether this was a mask-programmed ROM
> or an EPROM.
today I got a 1541-II which had an EPROM with
its firmware in it. This EPROM is labelled
C= CSG
251968-03
(C) 1987 CBM
So that's the standard/well known marking code.
See:
http://d81.de/shared/1541-II_Firmware_EPROM_C=_CSG_251968-03_(C)_1987_CBM.jpg
Womo
Message was sent through the cbm-hackers mailing list
Archive generated by hypermail pre-2.1.8.