Date: 2008-02-01 09:35:53
Hallo Andrew, > For anyone interested, I've posted this zip > file on my website at http://cottonwood.servebbs.com/wiskow I found the file.... and many other interesting things :) I had a quick glance at the PDF and I think I already can draw some conclusions: - The WD card is bitbanged: the 6526 controls address lines, RD and WR lines, and... datalines! I wonder why this is done. I already prooved that adding a simple 74139 enables you to easily connect Intel/Zilog based hardware. - I didn't understand this chain thing exactly but AFAIK then drive only support images. And then a remark about the pictures: they use two diodes to select the extra RAM. But IMHO they are placed in the wrong way: the Cathode points towards the RAM and that should have been the Anode! (or am I wrong ???) The above sounds a bit negative but nevertheless a nice idea. Can it be realised these days? I doubt it. I have some WD1002 cards laying around but the drives will be the problem. Two years ago I had ten good 20 MB MFM drives. Last year I had to throw a way five, just laying around already seems to be devastatious :( Just an short update on my own project: To be able to create subdirectories I need more tracks and sectors then only track 18. Forcing the 1541 to use another track then 18 is no problem, but then somewhere I run into trouble because the 1541 sees that I'm not using track 18. And this is done hard coded. Finding this hard coded place and replace them will take some time, I'm afraid. -- ___ / __|__ / / |_/ 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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