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W E L C O M E | Version 3.00C |
P I N O U T S |
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>PC-186 PINOUTS
Mouse/Joystick |
1 | 5V (output) |
| 2 | Right (input) | |
| 3 | Left (input) | |
| 4 | Down (input) | |
| 5 | Up (input) | |
| 6 | Button 0 (input) | |
| 7 | GROUND | |
| 8 | Select (output) | |
| 9 | Button 1 (input) |
The original case RM Nimbus 186 used a non standard keyboard, it was not an XT or an AT, although it used the same connector. Instead it used inverted TTL protocol (essentially rs232 but at lower voltages) @ a set 9600 Baud. This means that no other keyboard will work on the early Nimbus 186. The redesigned slimline Nimbus uses the industry standard PS/2 protocol. |
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Colour Monitor |
1 | High Light (output) |
| 2 | Line Sync (output) | |
| 3 | Red (output) | |
| 4 | GROUND | |
| 5 | Blue (output) | |
| 6 | Green (output) | |
| 7 | 12v (output) | |
| 8 | Frame Sync (output) |
Colour Monitor Lead |
This is the wiring diagram looking down each end of the cable. The view is of the plug pins. No wires are joined, they are just crossing on the diagram. |
Mono Monitor |
1 | Composite Video (output) |
| 2 | GROUND | |
| 3 | Frame Sync (output) | |
| 4 | Line Sync (output) | |
| 5 | Audio (output) | |
| 6 | Audio Mute(input) |
Printer |
1 | GROUND |
| 2 | NOT USED | |
| 3 | Printer Busy (input) | |
| 4 | NOT USED | |
| 5 | Printer Data (output) | |
| 6 | NOT USED |
Piconet / Aux |
Piconet |
RS422 TTL |
|
| 1 | GND |
GND |
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| 2 | PICO O/P |
RECEIVE |
|
| 3 | PICO O/P |
GND |
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| 4 | 12V |
NOT USED |
|
| 5 | NOT USED |
SEND |
|
| 6 | NOT USED |
NOT USED |
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| *Duplex RS422 is without handshake. Simplex is with handshake (send busy(i/p) = Pin 3, receive busy(o/p) = Pin 6) | |||
VOLTAGES
CONNECTOR |
NOMINAL VOLTAGE (V) |
Std. Max Current (A) |
Abs. Max Current (A) |
| Mains Outlet | Mains |
2.0 |
2.0 |
| Aux or Piconet | 12 |
0.6 |
0.65 |
| Colour Monitor | 12 |
0.06 |
0.1 |
| 12v Outlet | 12 |
0.0 |
0.65 |
| I/O Bus | 12 |
0.0 |
0.65 |
| 12v TOTAL | 12 |
0.65 |
0.65 |
| I/O Bus | 5 |
1.7 |
1.7 |
| Mouse/Joystick | 5 |
0.025 |
0.1 |
| 5v Outlet | 5 |
0.0 |
1.7 |
| 5v TOTAL | 5 |
1.7 |
1.7 |
The Mainboard connector voltages should be checked while still connected to the board so that the PSU is under load.
Without a load, the readings may be inaccurate and the PSU could overheat.
(this connector is for the original case RM Nimbus)
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