UNIDENTIFIED
486TC4
|
Processor |
80486SX/80487SX/80486DX |
|
Processor Speed |
20/25/33MHz |
|
Chip Set |
C & T |
|
Max. Onboard DRAM |
32MB |
|
SRAM Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit external memory card slot |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
JP2 |
Turbo LED |
JP10 |
|
Speaker |
JP7 |
Turbo switch |
JP11 |
|
Power LED & keylock |
JP8 |
32-bit external memory card |
S1 |
|
Reset switch |
JP9 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Factory configured - do not alter |
J3 |
unknown | |
|
Factory configured - do not alter |
J4 |
unknown | |
|
Battery select internal |
JP1 |
closed | |
|
Battery select external |
JP1 |
open | |
|
CMOS memory normal operation |
JP3 |
pins 1 & 2 closed | |
|
CMOS memory clear |
JP3 |
pins 2 & 3 closed | |
|
Monitor type select color |
JP4 |
pins 1 & 2 closed | |
|
Monitor type select monochrome |
JP4 |
pins 2 & 3 closed | |
|
Factory configured - do not alter |
JP5 |
unknown | |
|
Factory configured - do not alter |
JP15 |
unknown | |
|
CPU JUMPER CONFIGURATION | |||
|
CPU |
JP12 |
JP13 |
JP16 |
|
80486DX |
pins 2 & 3 closed |
pins 2 & 3 closed |
closed |
|
80487SX |
pins 1 & 2 closed |
pins 2 & 3 closed |
closed |
|
80486SX |
pins 2 & 3 closed |
pins 1 & 2 closed |
open |
|
SRAM JUMPER CONFIGURATION | |||
|
Jumper |
64KB |
128KB |
256KB |
|
SR1 |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
SR2 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
SR3 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
SR4 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
SR5 |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
SR6 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
SR7 |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
SR8 |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
SR9 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
SR10 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
SR11 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
SRAM CONFIGURATION | ||||
|
Size |
Cache SRAM |
Location |
TAG (U35) |
TAG (U37) |
|
32KB |
(4) 8K x 8 |
Bank 0 |
(1) 8K x 8 |
NONE |
|
64KB |
(8) 8K x 8 |
Banks 0 & 1 |
(1) 8K x 8 |
(1) 8K x 8 |
|
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 |
|
DRAM CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
JP6 |
|
1MB |
(4) 256K x 9 |
NONE |
pins 1 & 2 closed |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
pins 1 & 2 closed |
|
4MB |
(4) 1M x 9 |
NONE |
pins 1 & 2 closed |
|
5MB |
(4) 1M x 9 |
(4) 256K x 9 |
pins 2 & 3 closed |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
pins 1 & 2 closed |
|
16MB |
(4) 4M x 9 |
NONE |
pins 1 & 2 closed |
|
17MB |
(4) 4M x 9 |
(4) 256K x 9 |
pins 2 & 3 closed |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
pins 2 & 3 closed |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
pins 1 & 2 closed |