Hallo allemaal, IMHO a lot can reproduced, although not 100% exact. - Details of the floppy controller in the DX-64 prototype We know how a 4040 works and we know the differences with its little brother, the 2031. IMHO it should be doable to use these findings to turn a 1541 into a 1542. About the hardware, I have given it a rough thought. One could build a prototype using two 1541 boards (preferably 1541-IIs because it can be equiped with a 27256). On the first board three ranges of 1 KB are free for expansion: 2 KB for an extra 2 KB of RAM and 1 KB to address the 6522 of the second board that addresses the FDC and FDD on its turn. - Batteries Included Buscard II schematics Doesn't Mike Naberezny have one? - ROM from a 1591 disk drive - the high density 1581 - heard prototype was thrown away :( To be honest, I haven't an idea what hardware is needed to run a 1.44 MB drive at all. FYI, I have never seen the insides (or schematics) of an CMD FD2000. For example, is DMA a must? If it can be run using the 1581 hardware, IMHO two things have to be done: - the 1581 stores a complete track in memory. If we want to do that here as well, at least 8 KB have to be added. - change the sofware. OK, I know this is obvious but it can be done in two ways: - with the RAM expansion: just double the number of sectors/track - without the expansion: read/write every track like it is done on a 1541 FYI, in some spare times I'm still busy with 1581IDE project so I dare to say that I know where I am talking about. - Pictures/info of the internal hard drive of the C256 prototype Of the what ???? -- ___ / __|__ / / |_/ Groetjes, Ruud \ \__|_\ \___| URL: Ruud.C64.org De informatie in dit e-mailbericht is vertrouwelijk en uitsluitend bestemd voor de geadresseerde. Wanneer u dit bericht per abuis ontvangt, verzoeken wij u contact op te nemen met de afzender per kerende e-mail. Verder verzoeken wij u in dat geval dit e-mailbericht te vernietigen en de inhoud ervan aan niemand openbaar te maken. Wij aanvaarden geen aansprakelijkheid voor onjuiste, onvolledige dan wel ontijdige overbrenging van de inhoud van een verzonden e-mailbericht, noch voor daarbij overgebrachte virussen. APG Algemene Pensioen Groep NV is gevestigd te Heerlen en is ingeschreven in het handelsregister van de Kamer van Koophandel Limburg onder nummer 14099617 The information contained in this e-mail is confidential and may be privileged. It may be read, copied and used only by the intended recipient. If you have received it in error, please contact the sender immediately by return e-mail; please delete in this case the e-mail and do not disclose it's contents to any person. We don't accept liability for any errors, omissions, delays of receipt or viruses in the contents of this message which arise as a result of e-mail transmission. APG Algemene Pensioen Groep NV is registered in the trade register of the Chamber of Commerce Limburg, The Netherlands, registration number: 14099617 Message was sent through the cbm-hackers mailing listReceived on 2012-05-02 06:00:14
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