Re: [cbm4linux-users] XMP1541 parallel Problems

[Michael K. <mic...@pu...>]

Hi Andreas et al,

> - 1541 model II with 2.6 ROM, but has JD ROM aswell.

Hm, does JD increase the stepper frequency?

> d64copy -d 0 -t p -w 8 pw.d64
>
> it reads a few tracks fine, then bugs around and drops dead or skips 
> with an
> error. Whenever it skips with the error message, it reads a few tracks 
> with
> perfect speed again and bugs off again then.

When does it start to bug: At the start of a track or in the middle?
In the first case it might be because the head is moving too fast.

Here's a script to adjust the head movement speed:

#!/bin/sh
cbmctrl listen 8 15
echo -ne "M-W\005\034\003\064\000\064" > /dev/cbm
cbmctrl unlisten

Higher values instead of (both) 064's slow down, lower values speed up.
My 1571 gets unreliable below 024. The original ROM uses 064.
All values are octal.

HTH,

-- 
Michael

Darwin 6.5 Power Macintosh powerpc