Users of the SYS bios overlays implementing the standard Gemini disk routines
(version 14 and later) need do nothing as the
GM829
code will now become
effective. For those running SYS under the mixed disk formats option (rdisk is
true), listing 2 shows how multiple stepping rates can be supported in the SYS
bios. The code reflects my current situation, that is, with drives A,B and C
stepping at 3mSec and drive D stepping at 30mSec. If you require 3 (not more !!)
different rates then just duplicate the code for ‘doslow’ using a different rate
mask for each drive. After testing to see if that drive is selected (‘bit
??,a’) jump to its particular piece of code and then on to ‘dotyp’.
Listing 1
Listing 2
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