COMPUTREND SYSTEMS, INC.
CONTAQ SINGLE CHIP 486 (MS-4123 Ver. 1.1)
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
20/25/33/50(internal)/50/66(internal) |
|
Chip Set |
CONTAQ |
|
Max. Onboard DRAM |
32MB |
|
SRAM Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
250mm x 220mm |
|
I/O Options |
32-bit VESA card slots (2), auxiliary keyboard connector |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Auxiliary keyboard |
J2 |
Turbo switch |
J5/15 - 17 |
|
Power LED & keylock |
J5/1 - 5 |
Turbo LED |
J5/12 &13 |
|
Speaker |
J5/7 - 10 |
External battery |
J4 |
|
Reset switch |
J5/19 & 20 |
32-bit VESA card |
S1 & S2 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Monitor type select monochrome |
JP1 |
Open | |
|
Monitor type select color |
JP1 |
Closed | |
|
CPU speed select 20/25MHz |
JP3 JP13 |
pins 2 & 3 closed open | |
|
CPU speed select 33MHz |
JP3 JP13 |
pins 1 & 2 closed open | |
|
CPU speed select > 33MHz |
JP3 JP13 |
pins 1 & 2 closed closed | |
|
Battery select internal |
J4 |
pins 2 & 3 closed | |
|
Battery select external |
J4 |
Closed | |
|
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 |
|
5MB |
(4) 1M x 9 |
(4) 256K x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
17MB |
(4) 256K x 9 |
(4) 4M x 9 |
|
17MB |
(4) 4M x 9 |
(4) 256K x 9 |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CPU JUMPER CONFIGURATION | |
|
CPU |
JP6 |
|
80486DX2 |
pins 1 & 2, 4 & 5, 8 & 9, 11 & 12 |
|
ODP486SX |
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11 |
|
80486DX |
pins 1 & 2, 4 & 5, 8 & 9, 11 & 12 |
|
80487SX |
pins 1 & 2, 4 & 5, 7 & 8, 10 & 11 |
|
80486SX |
pins 2 & 5, 3 & 6, 8 & 11, 9 & 12 |
|
SRAM CONFIGURATION | ||||
|
Size |
Cache SRAM |
Location |
TAG |
JP2 |
|
64KB |
(8) 8K x 8 |
Banks 0 & 1 |
(1) 8K x 8 |
pins 1 & 2, 4 & 5, 7 & 8, and 10 & 11 |
|
128KB |
(4) 32K x 8 |
Bank 0 |
(1) 8K x 8 |
pins 1 & 2, 4 & 5, 8 & 9, and 11 & 12 |
|
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(1) 32K x 8 |
pins 2 & 3, 5 & 6, 8 & 9, and 11 & 12 |