8" drive variations
cclist at sydex.com
Wed Mar 14 18:12:28 CDT 2007
On 14 Mar 2007 at 14:33, info wrote:
> Yes those are the ones. Thanks
Here's what I've got.
DC Power is supplied through the 40 pin header that also carries the
interface signals. (AC power is supplied through a separate
connector). Be careful not to insert the connector "backwards!"
When I talk about SA-800 pins, I'm referring to the corresponding pin
on the Shugart SA-800 50 pin connector.
1. All even pins are ground.
2. +5 is applied to pins 1 and 3
3. +24 is applied through pins 9, 11, and 13
4. This drive has a single SELECT/ line on pin 15. That is, there
is no address decoding circuitry for multiple drive selects on this
model. So, you'd connect pin 15 to one of SA-800 pins 26, 28, 30 or
32 for DS1-4, respectively.
5. DIRECTION/ is pin 5 and corresponds to SA-800 pin 34
6. STEP is pin 7 and corresponds to SA-800 pin 36
7. TRACK 00/ is pin 17 and corresponds to SA-800 pin 42
8. HEAD LOAD/ is pin 19 and corresponds to SA-800 pin 18
9. READY/ is pin 21 and corresponds to SA-800 pin 22
10. TG43/ is pin 23 and corresponds to SA-800 pin 2
11. INDEX/ is pin 25 and corresponds to SA-800 pin 20
12. SECTOR/ (for hard sectored diskettes) is pin 27 and corresponds
to SA-800 pin 24
13. The Calcomp has WRITE ENABLED/ status on pin 29; you'll need to
invert this and gate with the SELECT/ signal with an OC gate and
connect it to SA-800 pin 44 (WRITE PROTECT/) if you want write-enable
sensing to work. Otherwise just terminate SA-800 pin 44 with a 150
14. WRITE DATA/ is pin 31 and corresponds to SA-800 pin 38
15. WRITE GATE/ is pin 33 and corresonds to SA-800 pin 40
16. I'm assuming that you'll use your own data separator, not the on-
drive one. RAW DATA/ is pin 37 and corresponds to SA-800 pin 46.
17. Leave pins 35 (SEP DATA/) and 39 (PLO SYNC/) NC.
That should do it.
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