TOPIC -----------------------------------------------------------
What are the pinouts for the Macintosh SE Bus Drive Card and PC 5.25" Drive?
DISCUSSION ------------------------------------------------------
Here are the pinouts for the internal cable, part number 590-0600, for the SE
Bus Drive Card. It has a 26-pin in-line connector on one end for the card
itself and a DB-37 connector on the other for the PC 5.25" Drive.
26 pin connector DB-37 connector
--------------------------------------------------
Signal Name
1 -------------- GND ------------- 2
2 ------------- Side 1 ----------- 18
3 -------------- GND ------------- NC
4 ----------- Read Data ---------- 17
5 -------------- GND ------------- 5
6 --------- Write Protect -------- 16
7 -------------- GND ------------- NC
8 ---------- Track 00 ------------ 15
9 -------------- GND ------------- NC
10 -------- Write Enable --------- 14
11 ------------- GND ------------- NC
12 -------- Write Data ----------- 13
13 ------------- GND ------------- NC
14 ------------ STEP ------------- 12
15 ------------- GND ------------- NC
16 ---------- Direction ---------- 11
17 ------------- GND ------------- NC
18 -------- Drive Select 0 ------- 9
19 ------------- GND ------------- 20
20 --------- Motor Drive 0 ------- 7
21 --------- Diskette Change ----- 19
22 ----------- INDEX ------------- 6
23 ------------ +12 Volts -------- 1
24 ------------ + 5 Volts -------- NC
25 ------------ +12 Volts -------- NC
26 ------------ + 5 Volts -------- 4
Here is the pinout for the DB37 connector on the Macintosh SE-Bus 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
These are the pinouts 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 inside the Macintosh SE. 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