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Krill
Registered: Apr 2002
Posts: 2980 |
Looking for exotic disk drives, non-1541 clones
Hi,
i am looking for third-party C-64 5.25" serial bus disk drives that are exceptionally incompatible with existing fast loaders due to their not being 1541 clones. They come with very different ROM code, register and memory layout, peripheral ICs and even processors.
Specifically, these are
MSD SD-1 and SD-2
Digilog FD 2064 and 2064/2
Tecmate NPH-501C with a firmware reporting as "Century Planning Corp. CX-500"
If you have these or other such devices i am not aware of, please tell.
Willing to trade, but remote code testing and debug sessions are welcome, too.
Thanks! |
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MagerValp
Registered: Dec 2001
Posts: 1078 |
It'd be interesting to see them added to VICE and emulated.
I have an MSD SD-2 up in the attic packed away in a somewhere... |
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chatGPZ
Registered: Dec 2001
Posts: 11386 |
Quote:It'd be interesting to see them added to VICE and emulated.
lets first emulate 1541 correctly =) |
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Norrland
Registered: Aug 2011
Posts: 14 |
I also have a crappy digilog (it was a tough childhood, since all other kids had their fastloader-compatible 1541). I'll dig into my old boxes and try to find what model it is, will gladly run some tests on it if that helps you. |
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Krill
Registered: Apr 2002
Posts: 2980 |
TheRyk: No, haven't. Thanks for the tip.
Thunder.Bird: SFD-1001 is supported under certain conditions (via KERNAL fallback, and test tool needs IEEE-488 interface mapped to $8000, iirc). Tested in VICE but not the real thing yet.
WVL: At the moment, mainly academic. I won't waste much time on supporting those drives before the important ones (1551...) work fine.
Groepaz: Stop this bloat talk already. You know perfectly well that it can be configured down to a whopping resident 256 bytes in the minimal setup. And nobody cares how big the installer with the drive code is, really.
HCL: Yeah, we talked about it already. Good i never used SAX on the serial bus registers. :) Bad a few new ideas of mine rely on that.
Magervalp: Yes, i was thinking of emulation, too. The MSDs are the most interesting drives, with that Rockwell R6511q controller.
Groepaz: And yes, you have a point there.
H Macaroni: Thanks! Tell me when you've found it. The ROM dump i have here suggests that they have saved a VIA by using some discrete logic chips, but the thing didn't come with schematics by any chance? (Some hi-res pics of the insides would rock, though.) :) |
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Hoild
Registered: Apr 2005
Posts: 29 |
I have a BlueChip 1541 clone, a BlueChip 1571 clone, and a "Bondwell" that seems to be a clone of BlueChip's 1541 clone... |
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chatGPZ
Registered: Dec 2001
Posts: 11386 |
Quote:And nobody cares how big the installer with the drive code is, really.
it must sure sound funny when i say it, but: you != everyone |
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Norrland
Registered: Aug 2011
Posts: 14 |
Quoting Krill
H Macaroni: Thanks! Tell me when you've found it. The ROM dump i have here suggests that they have saved a VIA by using some discrete logic chips, but the thing didn't come with schematics by any chance? (Some hi-res pics of the insides would rock, though.) :)
Found it, model name: FD2064. No schematics and as I can understand no info in the manual that helps you.. here's the pics.
Outside FD2064
Inside FD2064 1
Inside FD2064 2
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HCL
Registered: Feb 2003
Posts: 728 |
Quoting H MacaroniFound it, model name: FD2064. That *looks* exactly like my drive also, outside and inside :). |
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Krill
Registered: Apr 2002
Posts: 2980 |
Quote: Quote:And nobody cares how big the installer with the drive code is, really.
it must sure sound funny when i say it, but: you != everyone
Yes, very true in general.
However i don't see why anybody would reduce installer size to gain a few measly kilobytes at start-up. It's not like disks are brimful in most cases, or that a few more blocks of the bootstrap program would hurt that much.
But everyone is free to use a modified version, even if it means limiting the use to 1541. However, i won't add a configuration option for that, just like i won't add an option to disable checksumming for that extra bit of performance. :) |
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Krill
Registered: Apr 2002
Posts: 2980 |
Quote: I have a BlueChip 1541 clone, a BlueChip 1571 clone, and a "Bondwell" that seems to be a clone of BlueChip's 1541 clone...
If those are clones, they should be rather compatible. Any say on that? :) |
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