UNITRON COMPUTER, INC.
3/486 MAINBOARD
|
Processor |
80386DX/CX486DLC/80486SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
UMC |
|
Max. Onboard DRAM |
32MB |
|
SRAM Cache |
32/64/128/256KB |
|
BIOS |
AMI/Phoenix |
|
Dimensions |
230mm x 218mm |
|
I/O Options |
32-bit proprietary local bus slot, 32-bit VESA local bus slot |
|
NPU Options |
80387DX/CX487DLC |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J1 |
Speaker |
J29 |
|
Turbo LED |
J25 |
Power LED & keylock |
J30 |
|
Reset switch |
J26 |
32-bit local bus slot |
S1 |
|
Turbo switch |
J28 |
32-bit VESA local bus slot |
S2 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
| » |
Monitor type select color |
J6 |
pins 2 & 3 closed |
|
Monitor type select monochrome |
J6 |
pins 1 & 2 closed | |
| » |
Parity enabled |
J9 |
pins 2 & 3 closed |
|
Parity disabled |
J9 |
pins 1 & 2 closed | |
| » |
Factory configured - do not alter |
J21 |
Open |
| » |
Factory configured - do not alter |
J31 |
Open |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
1MB |
(4) 256K x 9 |
NONE |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
|
5MB |
(4) 256K x 9 |
(4) 1M x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
SRAM CONFIGURATION | |||
|
Size |
Cache |
Location |
TAG |
|
32KB |
(8) 8K x 8 |
Bank 0 |
(1) 8K x8 |
|
64KB |
(8) 8K x 8 |
Banks 0 & 1 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
Bank 0 |
(1) 8K x 8 |
|
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(1) 32K x 8 |
|
SRAM JUMPER CONFIGURATION | |||||||
|
Size |
J7 |
J8 |
J11 |
J12 |
J13 & J19 |
J17 |
J18 |
|
32KB |
Open |
pins 2 & 3 |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
|
64KB |
Open |
pins 1 & 2 |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
pins 1 & 2 |
pins 2 & 3 |
|
128KB |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
|
256KB |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
pins 2 & 3 |
pins 2 & 3 |
pins 2 & 3 |
pins 2 & 3 |
|
Note: Pins designated should in the closed position. | |||||||
.
|
VESA MODE CONFIGURATION | |||
|
Mode |
J22 |
J23 |
J24 |
|
Master |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
Slave |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
Note: VESA master mode can only be enabled when IC PAL 16R4 is installed. | |||
|
CPU TYPE CONFIGURATION | |||||
|
CPU Type |
J10 |
J14 |
J15 |
J16 |
J20 |
|
80386DX with NPU |
pins 1 & 2 |
N/A |
pins 1 & 2 |
N/A |
N/A |
|
80386DX w/o NPU |
pins 1 & 2 |
N/A |
pins 2 & 3 |
N/A |
N/A |
|
80486SX PQFP |
pins 2 & 3 |
Open |
pins 2 & 3 |
pins 2 & 3 |
Open |
|
80486SX PGA |
pins 2 & 3 |
Open |
pins 2 & 3 |
pins 2 & 3 |
pins 2 & 3 |
|
80486SX |
pins 2 & 3 |
pins 2 & 3 |
pins 2 & 3 |
pins 1 & 2 |
pins 1 & 2 |
|
80486SX + 487SX OD |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2, 3 & 4 |
pins 2 & 3 |
|
80486SX + 486DX PGA |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2, 3 & 4 |
pins 2 & 3 |
|
80486DX |
pins 2 & 3 |
pins 2 & 3 |
pins 2 & 3 |
pins 1 & 2, 3 & 4 |
pins 2 & 3 |
|
80486DX2 |
pins 2 & 3 |
pins 2 & 3 |
pins 2 & 3 |
pins 1 & 2, 3 & 4 |
pins 2 & 3 |
|
CPU SPEED CONFIGURATION | ||||
|
ICS2494 ( CPU Clock Generator) | ||||
|
Speed |
J2 |
J3 |
J4 |
J5 |
|
25MHz |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
33MHz |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
40MHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
50iMHz |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
50MHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
66iMHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
CPU SPEED CONFIGURATION | ||||
|
IMISC425 ( CPU Clock Generator) | ||||
|
Speed |
J2 |
J3 |
J4 |
J5 |
|
25MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
33MHz |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
40MHz |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
50iMHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
50MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
66iMHz |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |