Pin napisał/a:@Montezuma - zrobiłem rwtest na ramdysku. Albo inaczej, wrzuć tu config.sys lub plik *.cfg użytej konfiguracji.
A, teraz rozumiem. Myślałem, że te 28kB/s dotyczy Karin.
Znalazłem sensowne wytłumaczenie drac030:
https://atariage.com/forums/topic/20039 … nt=2627933
RWTEST counts execution time using VBL jiffy, and the Karin BIOS stops the VBL during I/O, because otherwise overruns occur. This is why the result given by the program is false.
The transmission speed is 250000 bits per second, i.e. about 30 KB/s.
The real speed may depend on the interleave, interleave 2 is used by default, which means a track will be read (or written) in two revolutions. A track is 18 sectors, 256 bytes each, or 9 sectors, 512 bytes each = 4.5 KB of data to transmit.
A floppy makes 300 revolutions per minute, which equals to 5 revolutions per second.
So, in a second, 2.5 tracks will be read or written, which makes the effective speed of 11.25 KB/s.
ATARI 65XE + SIO2BT