ROBOTECH, INC.
GMB-486UNL
|
Processor |
80486SX/80487SX/80486DX/80486DX2 |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
Toshiba |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
260mm x 220mm |
|
I/O Options |
32-bit VESA local bus slots (3) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J4 |
Turbo switch |
JP17 |
|
Power LED & keylock |
J5 |
Reset switch |
JP18 |
|
Speaker |
J6 |
32-bit VESA local bus slots |
SL1 - SL3 |
|
Turbo LED |
JP16 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
Monitor type select color |
JP1 |
Closed |
|
Monitor type select monochrome |
JP1 |
Open | |
|
|
CMOS memory normal operation |
JP2 |
pins 2 & 3 closed |
|
CMOS memory clear |
JP2 |
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) 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 |
|
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 |
|
32KB |
(4) 8K x 8 |
NONE |
(1) 8K x 8 |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
JP6 |
JP7 |
JP9 |
JP11 |
|
32KB |
Open |
Open |
Open |
pins 2 & 3 closed |
|
64KB |
Open |
Closed |
Open |
pins 1 & 2 closed |
|
128KB |
Open |
Closed |
Closed |
pins 1 & 2, 3 & 4 closed |
|
256KB |
Closed |
Closed |
Closed |
pins 1 & 2, 4 & 5 closed |
|
CPU TYPE CONFIGURATION | |
|
Type |
JP4 |
|
80486SX |
pins 5 & 6 closed |
|
80487SX |
pins 2 & 3, 4 & 5, 6 & 7 closed |
|
80486DX/DX2 |
pins 1 & 2, 4 & 5, 6 & 7 closed |
|
CPU SPEED CONFIGURATION | |||
|
Speed |
JP29 |
JP30 |
JP31 |
|
25MHz |
Closed |
Open |
Closed |
|
33MHz |
Closed |
Closed |
Open |
|
40MHz |
Open |
Open |
Closed |
|
50iMHz |
Closed |
Open |
Closed |
|
50MHz |
Open |
Closed |
Open |
|
66iMHz |
Closed |
Closed |
Open |
|
VESA CLOCK SPEED CONFIGURATION | |
|
CPU speed |
JP43 |
|
Same phase as CPU |
pins 2 & 3 closed |
|
Same phase as Toshiba U4800 chipset |
pins 1 & 2 closed |
|
BUS SPEED CONFIGURATION | |
|
CPU speed |
JP19 |
|
<=33MHz |
Open |
|
>33MHz |
Closed |
|
VESA WAIT STATE CONFIGURATION | |
|
Wait states |
JP20 |
|
0 wait states |
Open |
|
1 wait state |
Closed |
|
VESA MASTER/SLAVE CONFIGURATION | |||||
|
Setting |
JP40 |
JP41 |
JP42 |
JP44 |
JP45 |
|
PAL/GAL installed |
Open |
Open |
Open |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
PAL/GAL not installed |
Closed |
Closed |
Closed |
pins 2 & 3 closed |
pins 2 & 3 closed |