Ruud writes: > The problem is of course that there are still people around interested in > my documents, projects and in what I'm doing. All of them are free so if > someone of you is interested, I'll send him the DOC (HTML). You may use > how you like it, even use it for your own documents. I'm interested! > Hallo Ethan, Yo. > > I recently aquired an IDE interface for my C64 (IDE64). It seems to > > work fine, but there appears to be a problem with the built-in speed > > loader in an SX-64... > > As far as I know the 1541 in the SX is the same as a normal one. I rather > would say that, if any trouble at all, the cause is in the ROMs of the SX > as they do differ from the normal C64s. It is not the ROMs. :-( I got impatient and removed the hundreds of screws holding the top on the SX-64 and started checking and swapping parts. The FDD board uses the same chips and the short-board 1541. The SX-64 itself, of course, has a different ROM, but when I swapped that out, the speed-loader still failed. I now suspect PAL/NTSC timing differences. I got the speedloader code from the makers of the IDE-64. The comments are in a language unfamilar to me (something eastern-European), but there's enough there to figure out how it works. > So if I understand you well, this is a interface to connect an IDE-drive to a > C64. What kind of hardware does it use? Can it be re-engineered? Just > curiousity :-) It has a 62256 SRAM, a 27256 EPROM, an 8-pin real-time clock chip, and two Lattice isp1016 gate arrays. If you wanted to reverse-engineer the gate arrays, go right ahead. I won't stop you. :-) While this may be an issue in the future, this product is still in production. I am the first customer in the U.S. (which is also why I suspect a PAL/NTSC timing problem). > ??? I don't what kind of batteries you use but even a 2.5 inch HD is > bigger then a penlight. So this puzzles me. > (The problem with foreign languages is that you cannot see if someone is > making a joke) Not a joke. The 1.3" drive is approx 6mm x 40mm x 65mm. The 44pin connector is on the _long_ side of the drive. Imagine a drive the width of a 2.5" drive, but 40mm long. The battery in my brother's cell phone is 8mm x 50mm x 80mm, give or take. -ethan - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tcm.hut.fi.
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