AT & T
MODEL 6386SX/EL20 (FM-0589-09)
Processor | 80386SX (exact location unidentified) |
Processor Speed | 20MHz |
Chip Set | Unidentified |
Video Chip Set | None |
Maximum Onboard Memory | 32MB |
Maximum Video Memory | None |
Cache | 16/32/64KB |
BIOS | Unidentified |
Dimensions | 330mm x 218mm |
I/O Options | Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port, riser slot |
NPU Options | 80387SX |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
VGA feature connector | CN1 | VGA port | CN6 |
PS/2 mouse port | CN2 | Floppy drive interface | CN7 |
Serial port | CN3 | IDE interface | CN8 |
Serial port | CN4 | Riser slot | SL1 |
Parallel port | CN5 |
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
» | 16-bit video BIOS enabled | SW1/3 | Off |
8-bit video BIOS enabled | SW1/3 | On | |
» | 16-bit video buffer enabled | SW1/4 | Off |
8-bit video buffer enabled | SW1/4 | On | |
» | 1024 x 768 interlaced enabled | SW1/5 | On |
1024 x 768 non interlaced enabled | SW1/5 | Off | |
» | On board video enabled | SW1/8 | On |
On board video disabled | SW1/8 | Off | |
» | Password normal operation | W1 | Pins 1 & 2 closed |
Password clear | W1 | Pins 2 & 3 closed | |
» | Factory configured - do not alter | W2 | Open |
» | Monitor type select color | W3 | Closed |
Monitor type select monochrome | W3 | Open | |
» | Parallel port unidirectional | W4 | Closed |
Parallel port bidirectional | W4 | Open | |
» | PS/2 mouse IRQ12 enabled | W5 | Closed |
PS/2 mouse IRQ12 disabled | W5 | Open | |
» | Non volatile RAM normal operation | W7 | Open |
Non volatile RAM clear | W7 | Closed | |
» | Speaker type select onboard | W10 | Pins 1 & 2 closed |
Speaker type select offboard | W10 | Pins 2 & 3 closed | |
» | IDE interface LED enabled | W11 | Pins 2 & 3 closed |
IDE interface LED disabled | W11 | Pins 1 & 2 closed |
DRAM CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
1MB | (2) 256K x 9 | (2) 256K x 9 | None | None |
1.5MB | (2) 256K x 9 | (2) 256K x 9 | (2) 256K x 9 | None |
2MB | (2) 256K x 9 | (2) 256K x 9 | (2) 256K x 9 | (2) 256K x 9 |
2MB | (2) 1M x 9 | None | None | None |
2.5MB | (2) 1M x 9 | (2) 256K x 9 | None | None |
3MB | (2) 1M x 9 | (2) 256K x 9 | (2) 256K x 9 | None |
3.5MB | (2) 1M x 9 | (2) 256K x 9 | (2) 256K x 9 | (2) 256K x 9 |
4MB | (2) 1M x 9 | (2) 1M x 9 | None | None |
DRAM CONFIGURATION (CON’T) | ||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
4.5MB | (2) 1M x 9 | (2) 1M x 9 | (2) 256K x 9 | None |
5MB | (2) 1M x 9 | (2) 1M x 9 | (2) 256K x 9 | (2) 256K x 9 |
6MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | None |
6.5MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 256K x 9 |
8MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
8MB | (2) 4M x 9 | None | None | None |
8.5MB | (2) 4M x 9 | (2) 256K x 9 | None | None |
9MB | (2) 4M x 9 | (2) 256K x 9 | (2) 256K x 9 | None |
9.5MB | (2) 4M x 9 | (2) 256K x 9 | (2) 256K x 9 | (2) 256K x 9 |
10MB | (2) 4M x 9 | (2) 1M x 9 | None | None |
10.5MB | (2) 4M x 9 | (2) 1M x 9 | (2) 256K x 9 | None |
11MB | (2) 4M x 9 | (2) 1M x 9 | (2) 256K x 9 | (2) 256K x 9 |
12MB | (2) 4M x 9 | (2) 1M x 9 | (2) 1M x 9 | None |
12.5MB | (2) 4M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 256K x 9 |
14MB | (2) 4M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
16MB | (2) 4M x 9 | (2) 4M x 9 | None | None |
16.5MB | (2) 4M x 9 | (2) 4M x 9 | (2) 256K x 9 | None |
17MB | (2) 4M x 9 | (2) 4M x 9 | (2) 256K x 9 | (2) 256K x 9 |
18MB | (2) 4M x 9 | (2) 4M x 9 | (2) 1M x 9 | None |
18.5MB | (2) 4M x 9 | (2) 4M x 9 | (2) 1M x 9 | (2) 256K x 9 |
20MB | (2) 4M x 9 | (2) 4M x 9 | (2) 1M x 9 | (2) 1M x 9 |
32MB | (2) 4M x 9 | (2) 4M x 9 | (2) 4M x 9 | (2) 4M x 9 |
CACHE CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
16KB | (2) 8K x 8 | None |
32KB | (2) 8K x 8 | (2) 8K x 8 |
64KB | (2) 32K x 8 | None |
Note: The location of the cache is unidentified. |
CACHE JUMPER CONFIGURATION | |
Size | W9 |
16KB | Pins 1 & 2 closed |
32KB | Pins 1 & 2 closed |
64KB | Pins 2 & 3 closed |
MCLK SELECTION | |||
Type | SW1/6 | SW1/7 | |
» | 41.612MHz | On | On |
36.242MHz | Off | On | |
37.585MHz | On | Off | |
44.744MHz | Off | Off |
MONITOR SELECTION | |||
Setting | SW1/1 | SW1/2 | |
» | PS/2 VGA | Off | Off |
MDA | On | On | |
AT VGA | Off | On | |
CGA | On | Off |