EVEREX SYSTEMS, INC.
STEP ISA VL (EV-18211)
|
Processor |
80486SX/80487SX/80486DX |
|
Processor Speed |
20/25/33/50MHZ |
|
Chip Set |
Compaq |
|
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 |
|||
|
Purpose |
Location |
Purpose |
Location |
|
Turbo LED |
JP10 |
External battery |
JP17 |
|
Speaker |
JP11 |
Turbo switch |
JP32 |
|
Power LED & keylock |
JP13 |
32-bit VESA Local bus slot |
S1 |
|
Reset switch |
JP15 |
32-bit VESA Local bus slot |
S2 |
|
USER CONFIGURABLE SETTINGS |
|||
|
Function |
Jumper/Switch |
Position |
|
|
|
Factory configured - do not alter |
JP1 |
Closed |
|
|
Fast gate A20 normal operation |
JP9 |
pins 2 & 3 closed |
|
|
Fast gate A20 select alternate |
JP9 |
pins 1 & 2 closed |
|
|
Monitor type select color |
JP12 |
Closed |
|
|
Monitor type select monochrome |
JP12 |
Open |
|
|
CMOS memory normal operation |
JP16 |
pins 1 & 2 closed |
|
|
CMOS memory clear |
JP16 |
pins 2 & 3 closed |
|
|
CPU select 2 wait states |
JP29 |
pins 2 & 3 closed |
|
|
CPU select 1 wait state |
JP29 |
pins 1 & 2 closed |
|
|
LCLK gate select 1 wait state |
JP36 |
pins 1 & 2 closed |
|
|
LCLK gate select 2 wait state |
JP36 |
pins 2 & 3 closed |
|
|
CPUADS select 0 wait states |
JP38 |
pins 1 & 2 closed |
|
|
CPUADS select 1 wait state |
JP38 |
pins 2 & 3 closed |
|
|
Factory configured - do not alter |
JP100 |
Open |
|
|
Factory configured - do not alter |
JP101 |
Open |
|
|
Factory configured - do not alter |
JP102 |
pins 2 & 3 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 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
20MB |
(4) 1M x 9 |
(4) 4M 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 |
(1) 8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION |
|||
|
Size |
JP6 |
JP7 |
JP8 |
|
64KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 4 closed |
|
128KB |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
256KB |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
VESA WAIT STATE/BUS SPEED (ID2 & ID3) CONFIGURATION |
|||
|
CPU speed |
Wait states |
ID3 |
ID2 |
|
£ 33MHz |
0 wait states |
Open |
Open |
|
> 33MHz |
1 wait state |
Closed |
Closed |
|
CPU SPEED CONFIGURATION |
|
|
Speed |
JP30 |
|
20MHz |
pins 2 & 3 closed |
|
25MHz |
pins 2 & 3 closed |
|
33MHz |
pins 1 & 2 closed |
|
50MHz |
pins 1 & 2 closed |
|
CPU TYPE CONFIGURATION |
||||
|
Type |
JP2 |
JP3 |
JP4 |
JP5 |
|
80486SX |
pins 1 & 2 closed |
Open |
Open |
Open |
|
80487SX |
pins 2 & 3 closed |
Closed |
pins 1 & 2 closed |
Closed |
|
80486DX |
pins 2 & 3 closed |
Closed |
pins 2 & 3 closed |
Open |