TOPIC -----------------------------------------------------------
What are the pinouts for the Macintosh II PC Drive Card and PC 5.25" Drive?
DISCUSSION ------------------------------------------------------
Here is the pinout for the DB37 connector on the Macintosh II PC Drive
card. Note that pins not listed are not used.
DB37 Signal Name
_____________________________
1 ---------- +12 Volts
2 ---------- Ground
4 ---------- + 5 Volts
5 ---------- Ground
6 ---------- INDEX
7 ---------- Motor Enable
8 ---------- Drive Select 1
9 ---------- Motor enable
11 --------- Direction
12 --------- STEP
13 --------- Write Data
14 --------- Write Enable
15 --------- Track 00
16 --------- Write Protect
17 --------- Read Data
18 --------- Side 1
19 --------- Diskette Change
20 --------- Ground
25 --------- Ground
This is the pinout for the cable, part number 590-0368, used on the PC 5.25
inch drive. The cable uses a 34 pin connector and smaller 4 pin connector for
the DC power on the inside of the PC 5.25 inch drive and a DB37 connector that
attaches to the card in Macintosh II. Note that pins not listed are not used.
DB37 | Signal Name | 34 pin edge connector | DC Connector
_________________________________________________________________
1 ---------- +12 Volts ------------------------------ 1
2 ---------- Ground --------------------------------- 2
3 ---------- Low Density ---------- 2
4 ---------- +5 Volts ------------------------------- 4
5 ---------- Ground --------------------------------- 3
6 ---------- Index ---------------- 8
7 ---------- Motor Enable A ------- 16
9 ---------- Drive Select A ------- 10
11 --------- Direction ------------ 18
12 --------- Step ----------------- 20
13 --------- Write Data ----------- 22
14 --------- Write Enable --------- 24
15 --------- Track 00 ------------- 26
16 --------- Write Protect -------- 28
17 --------- Read Data ------------ 30
18 --------- Side 1 --------------- 32
19 --------- Disk Change ---------- 34
20 --------- Ground --------------- 1
25 --------- Ground --------------- 5
27 --------- FNPRES --------------- 7