Linked by Thom Holwerda on Sun 17th Jul 2011 12:01 UTC
Hardware, Embedded Systems "Back in the 80s, the Commodore C-64 had an intelligent floppy drive, the 1541, i.e. an external unit that had its own CPU and everything. The C-64 would send commands to the drive which in turn would then execute them on its own, reading files, and such, then send the data to the C-64, all over a propriatory serial cable. The manual for the 1541 mentioned, besides the commands for reading and writing files, that one would read and write to its internal memory space. Even more exciting was that one could download 6502 code into the drive's memory and have it executed there. This got me hooked and I wanted to play with that - execute code on the drive. Of course, there was no documention on what code could be executed there, and which functions it could use." Very interesting. I'm most interested in how he describes others taking his work, and making it better. This would be impossible today, thanks to Microsoft, Apple, and other patent trolls.
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RE: Slow?
by Dave_K on Mon 18th Jul 2011 14:01 UTC in reply to "Slow?"
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I remember running GEOS from a 1541 and being convinced that the drive was faulty. As someone used to the BBC Micro's (relatively) lightning fast drives loading software in a few seconds, I couldn't believe that floppies could be so slow.

At the time the painfully slow drives seemed like the C64's biggest disadvantage as a business computer. It made disk swapping and loading to change between singletasking applications a more frustrating experience, and I can't imagine disks in the 1541 being usable for virtual memory (as they were in some Beeb software).

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