STEP ISA VL (EV-18211) Motherboard Settings and Configuration
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 |
My Books
