ACHME COMPUTER, INC.
VLB 486CT1
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2/Pentium Overdrive |
|
Processor Speed |
20/25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (2) |
|
NPU Options |
None |
|
CONNECTIONS |
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|
Purpose |
Location |
Purpose |
Location |
|
External keyboard |
J2 |
Green PC |
JP38 |
|
External battery |
J4 |
32 Bit VESA slots |
S1 & S2 |
|
USER CONFIGURABLE SETTINGS |
|||
|
Function |
Jumper |
Position |
|
|
|
Monitor type select monochrome |
JP17 |
Open |
|
|
Monitor type select color |
JP17 |
Closed |
|
|
Factory configured - do not alter |
JP18 |
Closed |
|
|
Factory configured - do not alter |
JP22 |
pins 1 & 2 closed |
|
|
Factory configured - do not alter |
JP23 |
pins 1 & 2 closed |
|
|
Factory configured - do not alter |
JP26 |
pins 1 & 2 closed |
|
|
Factory configured - do not alter |
JP37 |
pins 1 & 2 closed |
|
PIN OUT CONFIGURATION |
|
|
Function |
J5 |
|
Keylock |
pins 3 & 5 closed |
|
Power LED |
pins 1 & 2 closed |
|
Speaker |
pins 7 , 8 , 9 & 10 closed |
|
Turbo LED |
pins 12 & 13 closed |
|
Turbo switch |
pins 15, 16 & 17 closed |
|
Reset switch |
pins 19 & 20 closed |
|
DRAM CONFIGURATION |
||
|
Size |
Bank 0 |
Bank 3 |
|
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 |
|
5MB |
(4) 1M x 9 |
(4) 256K x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
17MB |
(4) 256K x 9 |
(4) 4M x 9 |
|
17MB |
(4) 4M x 9 |
(4) 256K x 9 |
|
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 |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
NONE |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION |
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|
Size |
JP1 |
JP6 |
JP7 |
|
64KB |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
128KB |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
256KB |
pins 4 & 5 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
CPU TYPE CONFIGURATION |
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|
Type |
JP31 |
JP32 |
JP33 |
|
80486SX |
pins 3 & 4 closed |
Open |
pins 2 & 3 , 4 & 5 closed |
|
80486SX (PQFP) |
Open |
Open |
pins 1 & 2 closed |
|
80487SX |
pins 2 & 3 , 4 & 5 closed |
pins 1 & 2 closed |
pins 2 & 3 , 4 & 5 closed |
|
80486DX |
pins 2 & 3 , 4 & 5 closed |
pins 2 & 3 closed |
pins 2 & 3 , 4 & 5 closed |
|
80486DX (PQFP) |
pins 1 & 2 closed |
pins 4 & 5 closed |
pins 1 & 2 closed |
|
ODP486SX |
pins 2 & 3 , 4 & 5 closed |
pins 1 & 2 closed |
pins 2 & 3 , 4 & 5 closed |
|
80486DX2 |
pins 2 & 3 , 4 & 5 closed |
pins 2 & 3 closed |
pins 2 & 3 , 4 & 5 closed |
|
Pentium Overdrive |
pins 2 & 3 , 4 & 5 closed |
pins 1 & 2 closed |
pins 2 & 3 , 4 & 5 closed |
|
CPU SPEED CONFIGURATION |
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|
Speed |
OSC. |
JP8 |
JP12 |
JP13 |
JP14 |
|
20MHz |
40MHz |
pins 2 & 3 closed |
Closed |
Closed |
Open |
|
25MHz |
25MHz |
pins 2 & 3 closed |
Open |
Open |
Closed |
|
33MHz |
33MHz |
pins 1 & 2 closed |
Closed |
Open |
Open |
|
50i MHz |
25MHz |
pins 2 & 3 closed |
Open |
Open |
Closed |
|
50MHz |
50MHz |
pins 1 & 2 closed |
Open |
Closed |
Open |
|
66i MHz |
33MHz |
pins 1 & 2 closed |
Closed |
Open |
Open |
|
VESA WAIT STATE/BUS SPEED CONFIGURATION |
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|
CPU speed |
Wait states |
JP19 |
JP20 |
|
<=33MHz |
0 wait states |
Open |
Open |
|
>33MHz |
1 wait state |
Closed |
Closed |