home *** CD-ROM | disk | FTP | other *** search
-
- 1. Where to Put Wires onto the Motherboard
- ---------------------------------------
-
-
- note: the testpoint pins number from the notched end, like this:-
-
- TP2
- .-------------------------------.
- > O O O O O O O O O O |
- `-------------------------------'
- TP2/1 TP2/10
-
-
-
-
- Signal connection comment
- ------ ---------- -------
-
- A22 TP2/2 also exp bus pin 12
-
- A23 TP2/1 also exp bus pin 11
-
- A20 ROM/1 the other (unused) ROM socket
-
- /AS TP1/2 also exp bus pin 91
-
- R/W TP1/4 also exp bus pin 93
-
- /DS TP1/3 also exp bus pin 92
-
- /FIRE0 TP5/6 also exp bus pin 123
-
- /FIRE1 TP5/7 also exp bus pin 124
-
- /RESET TP2/9 also exp bus pin 118
-
- /DSACK1 TP2/4 also exp bus pin 97
-
- /PUNT TP5/3 also exp bus pin 117
-
- /DKRD see picture exp bus pin 129
-
- /DKWD '' exp bus pin 130
-
- DKWE '' exp bus pin 132
-
- MUTE '' exp bus pin 142
-
- LED '' exp bus pin 125
-
- Check connections BEFORE powering up your CD32. A wire in the
- wrong place could blow it up!
-
-
-
- 2. Where to put wires on the external drive connector
- --------------------------------------------------
-
-
- RDY DKRD GND GND GND GND GND MTRX SEL1 RST CHNG +5V
- o o o o o o o o o o o o
- 1 2 3 4 5 6 7 8 9 10 11 12
-
- 13 14 15 16 17 18 19 20 21 22 23
- o o o o o o o o o o o
- SIDE WPROT TRK0 DKWE DKWD STEP DIR SEL2 SEL0 +12V
-
-
-
-
- The GND (ground) connections should be wired to ground on the mother-
- board, close to the CD32 power connector. You will also need to make
- connections for the +5V and +12V. There is a set of pads called XU2
- for this, the leftmost (square) one is +12v, the centre one is ground,
- and the rightmost one is +5v. ( check your connections BEFORE plugging
- in a disk drive, get it wrong and the drive will blow up! )
-
-
- If you use a ribbon cable to make the signal connections, you will find
- that most wires will connect straight through. Pin 22 (INDEX) is not used.
- Don't connect the ground wires at the 23 pin connector end ( ie. all
- odd wires, 1 through 33, can be left off ).
-
-
-