Hi Trixter,
I've not looked at the code in detail but if it were possible to make it work in 2 or 4KB lumps, DOS file system overhead (and the partial sector transfer overhead) should be reduced? Plus the transfer should hopefully fit within the video refresh window at 30fps?
Anyway, got the mem-mapped writes going now. Seems stable, write speed wise microdrive is 170KB/s, CF cards are 235KB/s. Testing so far limited to 10-pass(es of 4MB) pattern test and running 8088-corruption, in a 5155. Pattern tests ran OK in a P200 too.
I've not looked at the code in detail but if it were possible to make it work in 2 or 4KB lumps, DOS file system overhead (and the partial sector transfer overhead) should be reduced? Plus the transfer should hopefully fit within the video refresh window at 30fps?
Anyway, got the mem-mapped writes going now. Seems stable, write speed wise microdrive is 170KB/s, CF cards are 235KB/s. Testing so far limited to 10-pass(es of 4MB) pattern test and running 8088-corruption, in a 5155. Pattern tests ran OK in a P200 too.