JETPRO INFOTECH COMPANY, LTD.
MB-4F
|
Processor |
80386DX/CX486DLC/80486SX/80487SX/80486DX/80486DX2 |
|
Processor Speed |
20/25/33/40/50(internal)/66(internal) |
|
Chip Set |
FOREX |
|
Max. Onboard DRAM |
32MB |
|
SRAM Cache |
64/128/256KB |
|
BIOS |
AMI/AWARD |
|
Dimensions |
220mm x 340mm |
|
I/O Options |
None |
|
NPU Options |
80387 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
JP2 |
Turbo switch |
JP15 |
|
Reset switch |
JP8 |
Turbo LED |
JP16 |
|
Power LED & keylock |
JP14 |
Speaker |
JP17 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Parity check enabled |
JP5 |
closed | |
|
Parity check disabled |
JP5 |
open | |
|
Monitor type select color |
JP6 |
closed | |
|
Monitor type select monochrome |
JP6 |
open | |
|
Factory configured - do not alter |
JP19 |
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) 1M x 9 |
(4) 4M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CPU TYPE CONFIGURATION | |||||
|
CPU |
JP12 |
JP13 |
JP30 |
W1A-W1G |
W2A-W2H |
|
80486DX2 |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
|
80486DX |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
|
80487SX |
pins 1 & 2 |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
pins 1 & 2 |
|
80486SX |
pins 2 & 3 |
pins 2 & 3 |
pins 2 & 3 |
pins 1 & 2 |
pins 1 & 2 |
|
80386DX |
N/A |
N/A |
N/A |
pins 2 & 3 |
pins 2 & 3 |
|
Note:Pins designated should be in the closed position. | |||||
|
SRAM CONFIGURATION | ||||
|
Size |
Cache SRAM |
Location |
TAG(U26) |
TAG(U42) |
|
64KB |
(8) 8K x 8 |
Banks 0 & 1 |
(1) 8K x 8 |
NONE |
|
128KB |
(4) 32K x 8 |
Bank 0 |
(1) 8K x 8 |
NONE |
|
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(1) 8K x 8 |
(1) 8K x 8 |
|
Note:The exact locations of U26 and U42 are unknown. | ||||
|
SRAM JUMPER CONFIGURATION | ||||||
|
Size |
JP8A |
JP8B |
JP8C |
JP8D |
JP8E |
JP8F |
|
64KB |
pins 2 & 3 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
pins 2 & 3 |
pins 1 & 2 |
|
128KB |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
|
256KB |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
|
Note:Pins designated should be in the closed position. | ||||||