49 47 45 5 3 1 +---------//-----+ | H H H //H H H | | ======//====== | | H H H// H H H | +-----//---------+ 50 48 46 6 4 2
Pin | Name | Dir | Description |
---|---|---|---|
1 | /CS1 | ![]() |
Memory Read in addresses 4000~7FFF |
2 | /CS2 | ![]() |
Memory Read in addresses 8000~BFFF |
3 | /CS12 | ![]() |
Memory Read in addresses 4000~BFFF |
4 | /SLTSL | ![]() |
Low when Slot 2 (cartridge slot) is selected |
5 | N/C | N/A | Not Connected. |
6 | /RFSH | ![]() |
Refresh signal from CPU |
7 | /WAIT | ![]() |
OC, Tells CPU to wait. Refresh signal is not maintained |
8 | /INT | ![]() |
OC, Requests a interrupt to CPU (call to addr 38h) |
9 | /M1 | ![]() |
CPU fetches first part of instruction from memory. |
10 | /BUSDIR | ![]() |
NC, was used to control the data direction. |
11 | /IORQ | ![]() |
I/O request signal. (Address=Port) |
12 | /MREQ | ![]() |
Memory request signal. (Address=Address) |
13 | /WR | ![]() |
Write signal (strobe) |
14 | /RD | ![]() |
Read signal (strobe) |
15 | /RESET | ![]() |
Reset |
16 | n/c | - | Not connected. |
17 | A9 | ![]() |
Address 9 |
18 | A15 | ![]() |
Address 15 |
19 | A11 | ![]() |
Address 11 |
20 | A10 | ![]() |
Address 10 |
21 | A7 | ![]() |
Address 7 |
22 | A6 | ![]() |
Address 6 |
23 | A12 | ![]() |
Address 12 |
24 | A8 | ![]() |
Address 8 |
25 | A14 | ![]() |
Address 14 |
26 | A13 | ![]() |
Address 13 |
27 | A1 | ![]() |
Address 1 |
28 | A0 | ![]() |
Address 0 |
29 | A3 | ![]() |
Address 3 |
30 | A2 | ![]() |
Address 2 |
31 | A5 | ![]() |
Address 5 |
32 | A4 | ![]() |
Address 4 |
33 | D1 | ![]() |
Data 1 |
34 | D0 | ![]() |
Data 0 |
35 | D3 | ![]() |
Data 3 |
36 | D2 | ![]() |
Data 2 |
37 | D5 | ![]() |
Data 5 |
38 | D4 | ![]() |
Data 4 |
39 | D7 | ![]() |
Data 7 |
40 | D6 | ![]() |
Data 6 |
41 | GND | ![]() |
Ground |
42 | CLOCK | ![]() |
CPU clock,
|
43 | GND | ![]() |
Ground |
44 | SW1 | - | Insert/remove detection for protection |
45 | +5V | ![]() |
+5 VDC (300mA max/Slot) |
46 | SW2 | - | Insert/remove detection for protection |
47 | +5V | ![]() |
+5 VDC (300mA max/Slot) |
48 | +12V | ![]() |
+12 VDC (50mA max/Slot) |
49 | SOUNDIN | ![]() |
Sound input (-5dBm) |
50 | -12V | ![]() |
-12 VDC (50mA max/Slot) |
Note: Direction is Computer relative Peripheral.