Hallo Nils, > Though I don't like the idea of ripping existing drives I have drives laying around where the mechanical parts are brooken beyond repair. But even then everything can be done in a neat way: take the 6502 or 6522 from the board and replace it with a PCB containing a socket for this IC plus the Atmel and other needed hardware. > Unlike the 8042, an AVR hasn't a hardware latch ... Hmmm, too bad. But it triggered another idea: In the 1541 a 6522 is used to control the mechanical drive and to exchange data with the floppy. Using the PCB mentioned above, connect the Atmel directly to this 6522 and let it emulate the mechanical drive. IMHO this idea is usable for other drives as well. The advantage of this idea: the ROM of the drive has not to be changed. Another option is throwing in a bit more hardware but how much is "a bit more"? > Disadvantage: what about subdirectories? That means changing the ROM. I have done it with my harddisk equiped 1541. > And data exchange isn't that easy if you store it using > Commodore DOS format instead of FAT16 etc. In case of using it as floppy emulator, the drive doesn't see the SD card at all so you are free to use any format. Using the IDE interface I use the C= format. Why convert it to FAT16 first? Harddisk are not meant to be removed as you do with SD-cards. I use a removable harddisk and of course a PC doesn't understand this C= gibberish so I wrote a Pascal program to exchange data. Before my HD project I used an extra 6522 to make a connection to the LPT port of a PC. The PC received the C= parameters and used them to exchange data with a floppy image; in this case a D64. The Atmel can do the same. > But CF cards would be first choice, since they can operate > at 5V, give you parallel 8 bit wide access Problem 1: not all support 8 bit access. Problem 2: I tried some using an IDE/CF interface and for one or another reason they didn't work :( Both HD and CF worked fine in a PC but only the HD worked fine in my 1541. -- ___ / __|__ / / |_/ 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 2011-05-31 10:00:13
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