PEAKTRON COMPUTER, INC.
486DX-25/33, 486SX-20
|
Processor |
80486SX/80486DX |
|
Processor Speed |
20/25/33MHz |
|
Chip Set |
Peaktron |
|
Max. Onboard DRAM |
32MB |
|
Cache |
None |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Reset switch |
J1 |
Speaker |
J4 |
|
Turbo switch |
J2 |
Power LED & Keylock |
J5 |
|
Turbo LED |
J3 |
External battery |
JP4 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper/Switch |
Position | |
|
Parity check enabled |
J6 |
Closed | |
|
Parity check disabled |
J6 |
Open | |
|
Factory configured - do not alter |
J8 |
N/A | |
|
Monitor type select monochrome |
J10 |
Open | |
|
Monitor type select color |
J10 |
Closed | |
|
CPU speed select switchable at turbo switch |
JP1 |
pins 1 & 2 closed | |
|
CPU speed select forced fast |
JP1 |
pins 2 & 3 closed | |
|
CPU speed select forced slow |
JP1 |
Open | |
|
Factory configured - do not alter |
JP5 |
N/A | |
|
20/25MHz CPU using 70ns DRAM or33MHz CPU using 60ns |
JP6 |
Open | |
|
20/25MHz CPU using 60ns DRAM |
JP6 |
Closed | |
|
Shadow BIOS disabled |
SW1/5 |
Closed | |
|
Shadow BIOS enabled |
SW1/5 |
Open | |
|
Bus speed select ATCLK/3 |
SW1/6 |
Open | |
|
Bus speed select ATCLK/4 |
SW1/6 |
Closed | |
|
Note:Location of JP6 is unverified. If using 8 bit SIMMs, J6 must be 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 |
|
DRAM JUMPER CONFIGURATION | ||||
|
Size |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
|
1MB |
Closed |
Open |
Open |
Closed |
|
2MB |
Open |
Open |
Open |
Closed |
|
4MB |
Closed |
Closed |
Open |
Open |
|
5MB |
Open |
Closed |
Open |
Closed |
|
8MB |
Open |
Closed |
Open |
Open |
|
16MB |
Closed |
Open |
Open |
Open |
|
20MB |
Open |
Open |
Closed |
Open |
|
32MB |
Open |
Open |
Open |
Open |
|
CPU TYPE CONFIGURATION | ||
|
Type |
JP2 |
JP3 |
|
80486SX |
pins 2 & 3 closed |
Open |
|
80486DX |
pins 1 & 2 closed |
Closed |
|
BIOS CONFIGURATION | ||
|
Type |
J7 |
J9 |
|
27256 |
Open |
pins 1 & 2 closed |
|
27512 |
Closed |
pins 2 & 3 closed |