12.013 I want to configure a CMS hard drive controller card to run a 20 meg drive for a //e. Could someone supply info on settings?
Description
This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
12.013 I want to configure a CMS hard drive controller card to run a 20 meg drive for a //e. Could someone supply info on settings?
According to the CMS manual, page D3, the six sets of eight pairs of
jumpers (u1....u6) are for the following purpose:
___________________________________ / |
/ u 1 u 2 u 3 u 4 j2 |
/ |
/ |
| |
| |
| |
| |
| |
| u 5 u 6 |
|___________________________________________ j1 |
| |
|______________________|
u 1: Boot Scan delay....manual shows no jumpers here in default
configuration
u 2: first (left) jumper is 'Enable I.C.P. (Yes/No)', middle 6 not
used, last (right) is 'multiple initiators (Yes/No)'...manual
shows no jumpers in default configuration
u 3: Selection phase time out delay....I believe this sets how long
the card waits for the drive to come up to speed(?)...manual
shows the default as having 4, 5, and 7 with jumpers installed
u 4: Arbitration phase time out delay....manual shows default as no
jumpers installed
u 5: Bus Free phase time out delay...manual shows default as jumper
on number 1
u 6: Interrupt recovery delay....manual shows jumpers on 3, 4,
and 5
J1 and J2 are single sets of pins. The manual says J2 is not used, but J1 is to
be jumpered.
The card I have here, came out of a IIGS where it was hooked to first a
twenty meg CMS drive, and later a forty meg CMS drive. It has the following
jumpers set:
u1: jumper on 7
u2: no jumpers
u3: jumpers on 4, 5, and 7
u4: no jumpers
u5: jumper on 1
u6: jumpers on 3, 4, and 5
j2: no jumper
j1: jumper
As I recall, this setup yeilded a rather long pause for the hard disk to
come up to speed (about 40 to 45 seconds) that we found necessary at the time
to avoid boot problems.
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