INTERCOMP, INC.
486 PERSONAL WORKSTATION
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2/80586SX |
|
Processor Speed |
20/25/33/50(Internal)/50/66(Internal)MHz |
|
Chip Set |
Intercomp/OPTI |
|
Max. onboard DRAM |
64MB |
|
SRAM Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (2), 10 base T ethernet floppy drive interface, IDE interface, parallel port serial port (2), VGA port, VGA feature connector |
|
NPU Options |
None |
|
CONNECTIONS |
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|
Purpose |
Location |
Purpose |
Location |
|
External battery |
P5 |
VGA feature connector |
P21 |
|
Serial port (COM2) |
P7 |
Keylock |
P31A |
|
Serial port (COM1) |
P8 |
Speaker |
P31B |
|
IDE interface |
P9 |
IDE interface LED |
P31D |
|
Parallel port |
P10 |
Turbo LED |
P31E |
|
Floppy drive interface |
P11 |
Turbo Switch |
P31F |
|
10 base T ethernet |
P18 |
Reset |
P31G |
|
VGA Port |
P20 |
32-bit VESA local bus slots |
S1 & S2 |
|
USER CONFIGURABLE SETTINGS |
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|
Function |
Jumper |
Position |
|
|
|
CMOS memory normal operation |
P3 |
Open |
|
|
CMOS memory clear |
P3 |
Closed |
|
|
VESA bus enabled |
P13 |
Pins 1 & 2, 3 & 5, 4 & 6 closed |
|
|
VESA bus disabled |
P13 |
Pins 1 & 2, 5 & 7, 6 & 8 closed |
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|
IDE select single mode |
P19 |
Pins 1 & 2 closed |
|
|
IDE select master/slave mode |
P19 |
Pins 1 & 2 open |
|
|
LPT select output mode |
P19 |
Pins 3 & 4 closed |
|
|
LPT select input/output mode |
P19 |
Pins 3 & 4 closed |
|
|
Factory configured do not alter |
P22 |
Pins 2 & 3 closed |
|
|
VESA bus VGA controller enabled |
P23 |
Pins 2 & 3 closed |
|
|
VESA bus VGA controller disabled |
P23 |
Pins 1 & 2 closed |
|
|
Factory configured do not alter |
P24 |
Pins 2 & 3 closed |
|
|
Factory configured do not alter |
P25 |
Pins 1 & 2 closed |
|
|
Factory configured do not alter |
P26 |
Pins 2 & 3 closed |
|
|
Monitor type select color |
P31C |
Open |
|
|
Monitor type select monochrome |
P31C |
Closed |
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Note: VESA bus should be disabled for 50MHz CPU speed operation. |
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VESA WAIT STATE (ID2) CONFIGURATION |
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|
Wait states |
CPU speed |
P14 (ID2) |
|
0 wait states |
£ 33MHz |
Pins 1 & 2 open |
|
1 wait state |
> 33MHz |
Pins 1 & 2 closed |
|
VESA BUS SPEED (ID3) CONFIGURATION |
|
|
CPU speed |
P14 (ID3) |
|
£ 33MHz |
Pins 3 & 4 open |
|
> 33MHz |
Pins 3 & 4 closed |
|
DRAM CONFIGURATION |
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|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
(4) 256K x 9 |
NONE |
NONE |
NONE |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
NONE |
NONE |
|
3MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
NONE |
|
4MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
NONE |
NONE |
|
5MB |
(4) 256K x 9 |
(4) 1M x 9 |
NONE |
NONE |
|
6MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 1M x 9 |
NONE |
|
7MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 1M x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
NONE |
|
9MB |
(4) 256K x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
|
10MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
|
12MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
|
13MB |
(4) 256K x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
NONE |
NONE |
|
17MB |
(4) 256K x 9 |
(4) 4M x 9 |
NONE |
NONE |
|
18MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 4M x 9 |
NONE |
|
19MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 4M x 9 |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
NONE |
NONE |
|
21MB |
(4) 256K x 9 |
(4) 1M x 9 |
(4) 4M x 9 |
NONE |
|
22MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 1M x 9 |
(4) 4M x 9 |
|
24MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 4M x 9 |
NONE |
|
25MB |
(4) 256K x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 4M x 9 |
|
28MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 4M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
NONE |
NONE |
|
33MB |
(4) 256K x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
NONE |
|
36MB |
(4) 1M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
NONE |
|
37MB |
(4) 256K x 9 |
(4) 1M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
|
40MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
|
48MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
NONE |
|
49MB |
(4) 256K x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
|
52MB |
(4) 1M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
|
64MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
|
CACHE CONFIGURATION |
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|
Size |
Cache |
Location |
TAG |
|
64KB |
(8) 8K x 8 |
Banks 0 & 1 |
(1) 16K x 4 |
|
128KB |
(4) 32K x 8 |
Bank 0 |
(1) 16K x 4 |
|
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(1) 16K x 4 |
|
CACHE JUMPER CONFIGURATION |
|
|
Size |
P15 |
|
64KB |
Pins 3 & 5, 4 & 6, 7 & 8 closed |
|
128KB |
Pins 1 & 3, 2 & 4, 7 & 8, 9 & 10 closed |
|
256KB |
Pins 3 & 5, 4 & 6, 7 & 8, 9 & 10, 11 & 12 closed |
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VIDEO START UP CONFIGURATION |
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|
Mode |
P27 |
P28 |
P29 |
|
640 x 480, 60Hz |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
640 x 480, 70Hz |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
800 x 600, 56Hz |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
|
800 x 600, 60Hz |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
|
800 x 600, 70Hz |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
|
1024 x 768, 43Hz |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
1024 x 768, 60Hz |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
1024 x 768, 70Hz |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
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I/O BASE ADDRESS AND BASE MEMORY ADDRESS |
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|
I/O Address |
Base Memory Address |
P33 |
P34 |
|
300h |
D8000h |
Closed |
Closed |
|
320h |
CC000h |
Open |
Closed |
|
340h |
D0000h |
Closed |
Open |
|
360h |
D4000h |
Open |
Open |
|
CPU TYPE AND SPEED CONFIGURATION |
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|
CPU Type |
Speed |
P16 |
P17 |
P30 |
|
80486SX |
20MHz |
Pins 3 & 4 closed |
Pins 3 & 5, 4 & 6 closed |
Pins 1 & 2 closed |
|
80486SX |
25MHz |
Open |
Pins 3 & 5, 4 & 6 closed |
Pins 1 & 2 closed |
|
80487SX |
20MHz |
Pins 3 & 4 closed |
Pins 3 & 5, 4 & 6 closed |
Pins 2 & 3 closed |
|
80487SX |
25MHz |
Open |
Pins 3 & 5, 4 & 6 closed |
Pins 2 & 3 closed |
|
80486DX |
25MHz |
Open |
Pins 3 & 5, 4 & 6 closed |
Pins 2 & 3 closed |
|
80486DX |
33MHz |
Pins 1 & 2 closed |
Pins 3 & 5, 4 & 6 closed |
Pins 2 & 3 closed |
|
80486DX |
50MHz |
Open |
Pins 1 & 3, 2 & 4 closed |
Pins 2 & 3 closed |
|
80486DX2 |
50i MHz |
Open |
Pins 3 & 5, 4 & 6 closed |
Pins 2 & 3 closed |
|
80486DX2 |
66i MHz |
Pins 1 & 2 closed |
Pins 3 & 5, 4 & 6 closed |
Pins 2 & 3 closed |