User`s guide

System 6.0.1
Three things I can think of to check:
One possibility is DMA compatibility. If your memory card is not DMA
compatible, then switch 1 on the Apple HS SCSI card should be open (up).
Another possibility I guess is a SCSI ID conflict. The Apple HS SCSI card's ID
at the factory is set to 7. Here are the Apple HS SCSI card switch
combinations:
note1: Switch 1 controls DMA; open (up) turns DMA off
note2: Switches 2-4 control SCSI card ID
note3: 'U' means open (up), 'D' means closed (down),
'z' means Set for correct DMA (see note1)
SWITCH: 1234 1234 1234 1234 1234 1234 1234 1234
SETTING: zUUU zUUD zUDU zUDD zDUU zDUD zDDU zDDD
CARD ID: 0 1 2 3 4 5 6 7
Third, the scsi chain needs termination power to work properly. This is
different from termination. Both are required for a properly functioning scsi
chain. It is possible that neither the Bernoulli drive nor the Apple HS SCSI
card is supplying termination power. If this is the case, and there is no other
device on the scsi chain to supply said power, it probably won't work. There is
a modification (requires soldering skills) to the Apple HS SCSI card to make it
supply termination power.
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From: Jack Countryman IAC
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 for the 1990 ROM, the six sets of eight pairs
of jumpers (u1....u6) are for the following purposes.
Note: This description of the jumpers is only true for the 1990 ROM.
On the 1987 ROM the jumpers have a different usage.
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/ u 1 u 2 u 3 u 4 j2 |
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