On Wed, 16 Sep 1998, Phil Clayton wrote:
James Willing wrote:
>
> On 16 Sep 1998, Frank McConnell wrote:
>
> > Phil Clayton <handyman(a)sprintmail.com> writes:
> > > I have several old 360K floppy drives removed from old XT's
> > > is it possible to use these in my CP/M machines..?
**** snip ****
Then that brings me to the next question.
Can I do some modification to my old XT drive to get it to work on the
Osborne 01?
Understand the Power in the ribbon thing..
Does anyone have a pin-out if it can be done..?
Thanks... Phil...
Courtesy of the chap who sent it to me some time back:
- don
The disk controller chip used on the main logic board is the Fujitsu 8877,
equivalent to the Western Digital 1793. The following pinouts apply to the
disk cable connector on the main logic board.
pin 1 GND
2 GND
3 GND
4 GND
5 GND
6 GND
7 GND
8 INDEX
9 GND
10 DRIVE SELECT 1
11 +12 volts
12 DRIVE SELECT 2
13 +12 volts
14 NC
15 +12 volts
16 4mhz clock
17 +12 volts
18 DIR
19 GND
20 STEP
21 +5 volts
22 WRITE DATA
23 +5 volts
24 WRITE GATE
25 +5 volts
26 TRACK 00
27 GND
28 WRITE PROTECT
29 GND
30 READ DATA
31 GND
32 SIDE SELECT
33 GND
34 LATE
Figure 7.3 Main Board Disk Cable Connector Pinouts