Qi 600 (Neptune
Motherboard) Revision 'E' (Rev 1.1.20)
RAM Configuration
|
Switches |
SIMM Capacity |
Memory Fitted |
1 |
2 |
3 |
Bank 0 |
Bank 1 |
1 MByte |
Off |
Off |
Off |
256k |
- |
1 MByte |
On |
Off |
Off |
256k |
- |
2 MByte |
Off |
On |
Off |
256k |
256k |
4 MByte |
Off |
Off |
On |
1 M |
- |
5 MByte |
On |
On |
Off |
256k |
1 M |
8 MByte |
On |
Off |
On |
1 M |
1 M |
12 MByte |
Off |
On |
On |
2 M |
1 M |
16 MByte |
On |
On |
On |
2 M |
2 M |
Disk Drives
| MB |
Make |
Model |
Type |
Part Number |
| 49 |
Seagate |
ST-157R |
46 RLL |
14004311 |
| 50 |
Quantum |
LPS52S |
SCSI |
14588431 |
| 100 |
Quantum |
LPS105S |
SCSI |
14588331 |
| 118 |
CDC/Seagate |
ST-1150R |
36 RLL |
14118411 |
Tape Drives
| MB |
Make |
Model |
Type |
Part Number |
| 40 |
Irwin |
3.5" |
|
XB45915 |
Floppy Drives
| MB |
Make |
Model |
Type |
Part Number |
| 2 MB |
Sony |
|
|
|
Ethernet Options
On Board Thin and Thick Ethernet.
Switch Settings
SW1
Switch |
On |
Off |
1 |
Pipeline 386 enable |
Pipeline 386 disable |
2 |
Pipeline 385 enable |
Pipeline 385 disable |
3 |
ROM's disabled |
ROM's enabled |
4 |
Refresh enabled |
Refresh disabled |
SW2
Switch |
On |
Off |
1 |
RAM
configuration |
2 |
RAM
configuration |
3 |
RAM
configuration |
4 |
CPU speed select |
5 |
CPU speed select |
6 |
Not currently
used |
7 |
*Weitek present |
Weitek not present |
8 |
Not currently
used |
* PAL required to enable |
RAM
| |
Switches |
SIMM Capacity |
Memory Fitted |
1 |
2 |
3 |
Bank 0 |
Bank 1 |
1 MByte |
Off |
Off |
Off |
256k |
- |
1 MByte |
On |
Off |
Off |
256k |
- |
2 MByte |
Off |
On |
Off |
256k |
256k |
4 MByte |
Off |
Off |
On |
1 M |
- |
5 MByte |
On |
On |
Off |
256k |
1 M |
8 MByte |
On |
Off |
On |
1 M |
1 M |
12 MByte |
Off |
On |
On |
2 M |
1 M |
16 MByte |
On |
On |
On |
2 M |
2 M |
Clock Speed
CPU speed MHz |
Switches |
| |
4 |
5 |
25 MHz |
Off |
On |
SW3
Position |
|
A |
Routes high resolution video clocks |
B |
High resolution video required |
SW4 Ethernet Configuration
| All ON - BNC connector enabled |
All OFF - D-type connector enabled |
Additional Options
| Apricot LOC Technology security. |
| Co - Processor |
| 80387DX |
| IC153 Replace with PAL N387153VB P/N 12156131 |
| IC155 Replace with PAL N387029VF P/N 12164031 |
| If the label on original PAL in IC29 finishes with D or E then do not
replace. |
Rear Panel
CMOS Discharge
To drain CMOS remove the battery and connect a 10 Ohm resistor between
TP13 and TP14.
If no resistor is available then it will take approx. 20 minutes to
drain.
|
