# CDTV Expansion Slot

     2  4  6  8 10 12 14 16 18 20 22 24 26 28 30
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     1  3  5  7  9 11 13 15 17 19 21 24 25 27 29

(At the computer)

30 PIN ??? CONNECTOR at the computer.

Pin | Name | Description
--- | --- | ---
1 | GND | Ground
2 | GND | Ground
3 | VCC | +5 VDC
4 | VCC | +5 VDC
5 | SD1 | Data Bus 1
6 | SD0 | Data Bus 0
7 | SD3 | Data Bus 3
8 | SD2 | Data Bus 2
9 | SD5 | Data Bus 5
10 | SD4 | Data Bus 4
11 | SD7 | Data Bus 7
12 | SD6 | Data Bus 6
13 | /SDREQ | DMA Request
14 | /INTX | Interrupt Request
15 | /CSS | Chip Select
16 | /SDACK | DMA Acknowledge
17 | /IOR | I/O Read
18 | /IOW | I/O Write
19 | A8 | Address Bus 8
20 | 7M | 7.16 MHz System Clock
21 | A6 | Address Bus 6
22 | A7 | Address Bus 7
23 | A4 | Address Bus 4
24 | A5 | Address Bus 5
25 | A2 | Address Bus 2
26 | A3 | Address Bus 3
27 | /IFRST | +5 VDC
28 | A1 | Address Bus 1
29 | GND | Ground
30 | GND | Ground