AST RESEARCH, INC.
ADVANTAGE! PLUS SYSTEM BOARD
(202529-001,2,3,4)
|
Processor |
80486SX/80487SX/80486DX/80486DX2 |
|
Processor Speed |
25/33/50(internal)/66(internal)MHz |
|
Chip Set |
VLSI |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/256KB |
|
BIOS |
AST |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
Floppy drive interface, IDE interface, parallel port, serial ports (2) |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Parallel port |
J1 |
Turbo LED |
JP3 |
|
Serial port 2 |
J2 |
Reset switch |
JP4 |
|
Serial port 1 |
J3 |
Speaker |
JP5 |
|
Floppy drive interface |
J4 |
Hard drive LED |
JP6 |
|
IDE interface |
J5 |
External battery |
JP22 |
|
Power LED & keylock |
JP2 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
» |
Monitor type select color |
JP1 |
Closed |
|
Monitor type select monochrome |
JP1 |
Open | |
|
» |
I/O bus speed select ATCLK disabled |
JP18 |
Open |
|
I/O bus speed select ATCLK enabled |
JP18 |
Closed | |
|
» |
IRQ7 select enabled |
JP19 |
pins 2 & 3 closed |
|
IRQ5 select enabled |
JP19 |
pins 1 & 2 closed | |
|
» |
I/O port enabled |
JP20 |
pins 1 & 2 closed |
|
I/O port disabled |
JP20 |
pins 2 & 3 closed | |
|
» |
CMOS memory normal operation (Internal Battery) |
JP21 |
pins 2 & 3 closed |
|
CMOS memory normal operation (External Battery) |
JP21 |
Open | |
|
CMOS memory clear |
JP21 |
pins 1 & 2 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) 1M x 9 |
(4) 256K x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CACHE CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
TAG/U19 |
TAG/U20 |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
NONE |
|
256KB |
(4) 32 x 8 |
(4) 32 x 8 |
(1) 32 x 8 |
(1) 64 x 1 |
|
CACHE CONFIGURATION | ||||
|
Size |
JP7 |
JP11 |
JP12 |
JP13 |
|
64KB |
Open |
Open |
Open |
Open |
|
256KB |
Closed |
Closed |
Open |
Closed |
|
CPU TYPE CONFIGURATION | |||
|
Type |
JP8 |
JP9 |
JP10 |
|
80486SX |
Open |
pins 2 & 3 closed |
Open |
|
80487SX |
pins 2 & 3 closed |
pins 1 & 2 closed |
Closed |
|
80486DX |
pins 1 & 2 closed |
pins 1 & 2 closed |
Closed |
|
80486DX2 |
pins 1 & 2 closed |
pins 1 & 2 closed |
Closed |
|
CPU SPEED CONFIGURATION | ||||
|
Speed |
JP14 |
JP15 |
JP16 |
JP17 |
|
25MHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
33MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
50I MHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
66I MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |