SIREX
640KB TURBO SYSTEM
|
Processor |
8088 |
|
Processor Speed |
4.77/8MHz |
|
Chip Set |
None |
|
Max. onboard DRAM |
640KB |
|
SRAM Cache |
None |
|
BIOS |
Phoenix |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
8087 |
|
CONNECTIONS |
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|
Purpose |
Location |
Purpose |
Location |
|
Keylock |
C1 |
Speaker |
C4 |
|
Power LED |
C2 |
Reset switch |
C5 |
|
Turbo LED |
C3 |
|
|
|
USER CONFIGURABLE SETTINGS |
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|
Function |
Jumper/Switch |
Position |
|
|
|
CPU speed select low switchable via keyboard |
J1 |
pins 1 & 2 closed |
|
|
CPU speed select high switchable via keyboard |
J1 |
pins 3 & 4 closed |
|
|
CPU speed select normal/turbo switchable via keyboard |
J1 |
pins 5 & 6 closed |
|
|
Factory configured - do not alter |
SW1/switch 1 |
Off |
|
|
NPU disabled |
SW1/switch 2 |
On |
|
|
NPU enabled |
SW1/switch 2 |
Off |
|
|
Factory configured - do not alter |
SW1/switch 3 |
Off |
|
|
Factory configured - do not alter |
SW1/switch 4 |
Off |
|
Note: The board can only use the normal/turbo mode with a reprogrammed BIOS, this option may not be available on all boards. |
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|
DRAM CONFIGURATION |
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|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
256KB |
(8) 41256 |
NONE |
NONE |
NONE |
|
512KB |
(8) 41256 |
(8) 41256 |
NONE |
NONE |
|
578KB |
(8) 41256 |
(8) 41256 |
(8) 4164KB |
NONE |
|
640KB |
(8) 41256 |
(8) 41256 |
(8) 4164KB |
(8) 4164KB |
|
EPROM/ROM CONFIGURATION |
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|
Switch |
2764 (U25A) |
27128 (U25B) |
8K ROM (U25A) |
32K ROM (U25C) |
|
SW2/1 |
On |
On |
On |
Off |
|
SW2/2 |
Off |
Off |
Off |
On |
|
SW2/3 |
On |
Off |
On |
Off |
|
SW2/4 |
Off |
On |
Off |
On |
|
SW2/5 |
On |
On |
Off |
On |
|
SW2/6 |
Off |
Off |
On |
Off |
|
SW2/7 |
On |
On |
Off |
On |
|
SW2/8 |
Off |
Off |
On |
Off |
|
SW3/1 |
Off |
On |
Off |
On |
|
SW3/2 |
On |
Off |
On |
Off |
|
SW3/3 |
Off |
Off |
Off |
On |
|
SW3/4 |
On |
On |
On |
Off |
|
DISPLAY CONFIGURATION |
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|
Display Adapter |
SW1/5 |
SW1/6 |
SW1/7 |
SW1/8 |
|
None |
On |
Off |
N/A |
N/A |
|
Color/Graphics (40x20) |
Off |
On |
On |
On |
|
Color/Graphics (80x25) |
On |
Off |
On |
On |
|
Monochrome or Both |
Off |
Off |
On |
On |
|
FLOPPY DRIVE CONFIGURATION |
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|
Drives Installed |
SW1/7 |
SW1/8 |
|
1 |
On |
On |
|
2 |
Off |
On |
|
3 |
On |
Off |
|
4 |
Off |
Off |