Date: 2007-12-14 08:25:32
Hallo allemaal, > I think signficant development needs to happen before they > will be generally usable. Ruud might disagree, No, I don't disagree. The only working program is my 1541IDE3 project, the project that enables you to copy floppies to and from an harddisk in the form of images. Not a project where a lot of people are waiting for IMHO. But it is a start. But for programmers with two left hands regarding soldering, it is ideal :) And another tip: use Nicolas Welte's 6502 board to expand your 1541 with extra ROM and RAM. > and he's welcome to note how usable to design is at present. It exceeds expactations: 1) Your solution enables one not only to use it in C= drives but in any 6502 machine: Apple, various Acorn machines, Atari etc. 2) Being able to stick it in the expansionport of a C64 makes it a potential competitor for the IDE64. But where to leave the needed software? I have two ideas for this: - As the 6502 socket will be left empty, create an adaptor socket so an EPROM can be placed there. - Replace the original ROM with a 27128 or 27256, remove the cassette routines and use the lines of the cassette port to access the other 8 KB part(s) of the EPROM. I only have one remark: it will be very difficult to use the 512 bytes sectors as they are. For example: using the well known Track/Sector linking won't work as the Sector byte is used to tell the system how many bytes are used on the last track. And a byte cannot store numbers greater than 255 :( And I already mentioned it on my site: splitting the 512 bytes sector in two 256 bytes Commodore sectors is no problem. But it needs extra work to save one C= sector and IMHO extra RAM. These remarks are not for putting the design down but just to remind people of some facts. I only hope that maybe one of us comes with an enginious idea to cope with these challenges. But returning to our original subject, using it in a 1541 or a 8250. Yesterday once again the idea rose to use the filesystem of CMD as base. Advantage: the well known Track/Sector linking can still be used, problem: we are stuck to 16 MB partitions, something I'm not looking forward to. My ultimate goal will be being able to use all well known file systems in one Kernal. Regarding the 8x50: the ROM for the FDC resides inside the 6530. I haven't found time yet to find out if the I/O of the 6530 is needed when using a harddisk. If not, the needed EPROM can be stuck on the board using an adaptor. If it is needed, Nicolas 6502 board can provide a solution. -- ___ / __|__ / / |_/ 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. Stichting Pensioenfonds ABP is gevestigd te Heerlen en ingeschreven bij de Kamer van Koophandel Zuid Limburg onder nummer: 41074000 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 its 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. Stichting Pensioenfonds ABP, having its registered office at Heerlen, is registered in the Traderegister of the Chamber of Commerce Zuid Limburg (Maastricht), the Netherlands, registration number: 41074000 Message was sent through the cbm-hackers mailing list
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