4 ms·
I was trying to get a grasp on what would be pratical. Even 4MB would take you hours to load from floppies with a 6502. Terabytes with a 68000 would also be i
by forinti 6mo ago
I was trying to get a grasp on what would be pratical.
Even 4MB would take you hours to load from floppies with a 6502.
Terabytes with a 68000 would also be impractical.
- Joker_vD 6mo ago> Even 4MB would take you hours to load from floppies with a 6502. Depends on your clock. Also, you could use some dedicated hardware, like a DMA controller e.g. 8257, or 8237. From 8257's datasheet: Speed The 8257 uses four clock cycles to transfer byte of data. No cycles are lost in the master to master transfer maximizing bus efficiency. 2MHz clock input will allow the 8257 to transfer at rate of 500K bytes/second. and I recall 8237 could do even better, if wired and programmed properly.
- bluGill 6mo agoHard drivers were available for the 6502. They were expensive ($10k for a 10MB drive as I recall prices came down a lot, but never affordable in the 1980s) Processing terabytes with a single CPU was impractical, but you could in theory connect it.