17 May
2006
17 May
'06
10:24 p.m.
On 5/17/2006 at 9:55 PM dwight elvey wrote:
I still have some issues but all have work arounds.
1. The BIOS sets the step rate too fast for the ST251. It
seems to be around 2.5ms. I found the ST251 doesn't
like more than 3ms. I wrote a program that I put on my boot
floppy that sets it to 4.0ms. Does anyone know the correct
step rate for the st251? I'll have to hack the BIOS some
day to fix this.
Dwight, the ST-251 has a buffered seek, so you should be able to fire out
seek pulses at 100 usec intervals and wait for SEEK COMPLETE. The
single-track seek time on the ST-251 is specified at 8 msec, with maximum
seek (621 cylinders) at 70 msec. I suppose you could treat it like an
ST506 and use 3msec, however.
Cheers,
Chuck