ADVANCED COMPUTER TECHNOLOGY, LTD.
LAT-25/4M, LAT-16/4M, LAT-12/4M
Processor | 80286 |
Processor Speed | 12/16/25MHz |
Chip Set | ACT |
Max. Onboard DRAM | 4MB |
Cache | None |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | None |
NPU Options | 80287 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Turbo LED | JP2 | External battery | JP11 |
Power LED & Keylock | JP7 | Speaker | JP14 |
Reset switch | JP10 | Turbo switch | JP19 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper/Switch | Position | |
» | Factory configured - do not alter | JP4 | N/A |
» | BIOS type select 27256 | JP6 | pins 1 & 2 closed |
ROM type select 27512 | JP6 | pins 2 & 3 closed | |
» | Factory configured - do not alter | JP8 | N/A |
» | Monitor type select color | JP9 | pins 2 & 3 closed |
Monitor type select monochrome | JP9 | pins 1 & 2 closed | |
» | Battery select internal | JP12 | pins 2 & 3 closed |
Battery select external | JP12 | pins 1 & 2 closed | |
» | Power good signal detect from power supply | JP13 | pins 1 & 2 closed |
Power good signal detect from board | JP13 | pins 2 & 3 closed | |
» | Factory configured - do not alter | JP15 | N/A |
» | Factory configured - do not alter | JP16 | N/A |
» | Bus speed select 8MHz | JP17 | pins 1 & 2 closed |
Bus speed select 6MHz | JP17 | pins 2 & 3 closed | |
» | Factory configured - do not alter | JP18 | N/A |
» | Parity check enabled | JP20 | pins 1 & 2 closed |
Parity check disabled | JP20 | pins 2 & 3 closed | |
» | Factory configured - do not alter | JP21 | N/A |
» | Factory configured - do not alter | JP22 | N/A |
» | RAM speed select 0 wait states | SW1/4 | Off |
RAM speed select 1 wait state | SW1/4 | On | |
Note:SW1/4 must be on for the LAT-25/4M model. |
DRAM CONFIGURATION | ||||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | P-0 | P-1 |
512KB | (4) 44256 | NONE | NONE | NONE | (2) 41256 | NONE |
512KB | NONE | NONE | (2) 256K x 9 | NONE | NONE | NONE |
640KB | (4) 44256 | (4) 4464 | NONE | NONE | (2) 41256 | (2) 4164 |
640KB | NONE | (4) 4464 | (2) 256K x 9 | NONE | NONE | (2) 4164 |
1MB | (4) 44256 | (4) 44256 | NONE | NONE | (2) 41256 | (2) 41256 |
1MB | (4) 44256 | NONE | NONE | (2) 256K x 9 | (2) 41256 | NONE |
1MB | NONE | NONE | (2) 256K x 9 | (2) 256K x 9 | NONE | NONE |
2MB | NONE | NONE | (2) 1MBx 9 | NONE | NONE | NONE |
4MB | NONE | NONE | (2) 1MBx 9 | (2) 1MBx 9 | NONE | NONE |
DRAM SWITCH CONFIGURATION | |||
Size | SW1/1 | SW1/2 | SW1/3 |
512KB | On | On | On |
640KB | On | Off | Off |
1MB | On | Off | On |
2MB | Off | On | On |
4MB | Off | Off | On |