EVEREX SYSTEMS, INC.
STEP 486SX20 (EV-18116)
|
Processor |
80486SX/80487SX/80486DX |
|
Processor Speed |
20/25MHz |
|
Chip Set |
C & T |
|
Max. onboard DRAM |
32MB |
|
Cache |
128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit external memory card, floppy drive interface, IDE interface, parallel port, serial ports (2) |
|
NPU Options |
4167 |
|
CONNECTIONS |
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|
Purpose |
Location |
Purpose |
Location |
|
Parallel port |
CN1 |
Floppy drive interface |
CN5 |
|
Serial port (COM1) |
CN2 |
32-bit external memory card |
S1 |
|
Serial port (COM2) |
CN3 |
Instep socket |
U19 |
|
IDE interface |
CN4 |
|
|
|
CACHE CONFIGURATION |
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|
Size |
Max Cachable |
Bank 0 |
Bank 1 |
|
128KB |
16MB |
(4) 32K x 8 |
NONE |
|
256KB |
32MB |
(8) 32K x 8 |
Banks 0 & 1 |
|
CACHE JUMPER CONFIGURATION |
|
|
Size |
P1 |
|
128KB |
pins 2 & 3 closed |
|
256KB |
pins 2 & 3 closed |
|
SERIAL PORT 1 CONFIGURATION |
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|
COM1 |
J15/1 & 2 |
J15/3 & 4 |
J15/5 & 6 |
J15/7 & 8 |
|
|
|
IRQ3 |
Open |
Closed |
Open |
Open |
|
» |
IRQ4 |
Open |
Open |
Closed |
Open |
|
|
IRQ5 |
Open |
Open |
Open |
Closed |
|
|
IRQ9 |
Closed |
Open |
Open |
Open |
|
SERIAL PORT CONFIGURATION |
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|
COM2 |
J15/9 & 10 |
J15/11 & 12 |
J15/13 & 14 |
J15/15 & 16 |
|
|
» |
IRQ3 |
Open |
Closed |
Open |
Open |
|
|
IRQ4 |
Open |
Open |
Closed |
Open |
|
|
IRQ5 |
Open |
Open |
Open |
Closed |
|
|
IRQ9 |
Closed |
Open |
Open |
Open |
|
PARALLEL PORT CONFIGURATION |
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|
LPT 2 |
J12/pins 1 & 2 |
J12/pins 3 & 4 |
J12/pins 5 & 6 |
|
|
|
IRQ5 |
Open |
Closed |
Open |
|
» |
IRQ7 |
Open |
Open |
Closed |
|
|
IRQ9 |
Closed |
Open |
Open |
|
CPU TYPE CONFIGURATION |
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|
Type |
JP1 |
JP2 |
JP3 |
JP4 |
|
80486SX |
pins 1 & 2 closed |
Open |
Open |
Open |
|
80487SX |
pins 2 & 3 closed |
Closed |
Closed |
Open |
|
80486DX |
pins 2 & 3 closed |
Closed |
Open |
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) 1M x 9 |
(4) 256K x 9 |
NONE |
NONE |
|
6MB |
(4) 1M x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
NONE |
|
7MB |
(4) 1M x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
NONE |
|
9MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 256K x 9 |
NONE |
|
10MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
|
12MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
|
13MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 256K 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) 4M x 9 |
(4) 256K x 9 |
NONE |
NONE |
|
18MB |
(4) 4M x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
NONE |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
NONE |
NONE |
|
21MB |
(4) 4M x 9 |
(4) 1M x 9 |
(4) 256K x 9 |
NONE |
|
22MB |
(4) 4M x 9 |
(4) 1M x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
|
24MB |
(4) 4M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
|
25MB |
(4) 4M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 256K x 9 |
|
28MB |
(4) 4M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
|
DRAM CONFIGURATION CON'T |
||||
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
NONE |
NONE |
|
33MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 256K x 9 |
NONE |
|
34MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
|
36MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 1M x 9 |
NONE |
|
37MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 1M x 9 |
(4) 256K x 9 |
|
40MB |
(4) 4M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 4M x 9 |
|
48MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
NONE |
|
49MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 256K x 9 |
|
52MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 1M x 9 |
|
64MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |