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The article mentions fast loaders like V-Max. What did they do to increase disk IO so much?
by kenjackson 4y ago
The article mentions fast loaders like V-Max. What did they do to increase disk IO so much?
- Lio 4y ago> The C-64's designers blamed the 1541's slow speed on the marketing department's insistence that the computer be compatible with the 1540, which was slow because of a flaw in the 6522 VIA interface controller. I believe they were able to work around the original flaws in the disk drives introduced for backwards compatibility with the Vic-20. > Without hardware modifications, some "fast loader" utilities (which bypassed routines in the 1541's onboard ROM) managed to achieve speeds of up to 4 KB/s.
- vintermann 4y agoThese days, fast loaders achieve speeds up to 19.6 kb/s (Krill's Transwarp, although it does require a custom file format), or ~50 times the usual speed.
- teki_one 4y agoUsing the clock line for data too. The disk drive was a computer too with a CPU, it run on very similar speed to the C64, so you can rely them being in sync. In detail: https://www.pagetable.com/?p=568 https://www.pagetable.com/?p=568