EVEREX SYSTEMS, INC.
STEP PLUS 486 (EV-18216)
|
Processor |
80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
Unidentified |
|
Max. Onboard DRAM |
64MB |
|
Cache |
64/128/256KB |
|
BIOS |
Unidentified |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
Floppy drive interface, IDE interface, SCSI connector, parallel port, serial ports (2), VGA port, microphone port, LAN port, CD-ROM auxiliary in, riser slot |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
LAN port |
CN1 |
Power LED |
J4 |
|
Serial port 2 |
CN2 |
IDE interface LED |
J5 |
|
Parallel port |
CN3 |
Keylock |
J6 |
|
Microphone port |
CN4 |
Speaker |
J7 |
|
Speaker port |
CN5 |
IDE interface |
J9 |
|
Serial port 1 |
CN6 |
SCSI interface |
J10 |
|
Floppy drive interface |
CN7 |
CD-ROM auxiliary in |
J14 |
|
Speaker button |
J1 |
VGA port |
J15 |
|
Reset switch |
J2 |
Riser slot |
SL1 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
CMOS memory normal operation |
JP5 |
Open |
|
CMOS memory clear |
JP5 |
Closed | |
|
|
On board VGA IRQ9 disabled |
JP8 |
Open |
|
On board VGA IRQ9 enabled |
JP8 |
Closed | |
|
|
IDE interface enabled |
JP9 |
Closed |
|
IDE interface disabled |
JP9 |
Open | |
|
|
SCSI IRQ select IRQ12 |
JP12 |
pins 2 & 3 closed |
|
SCSI IRQ select IRQ10 |
JP12 |
pins 1 & 2 closed | |
|
|
Parallel port IRQ select IRQ7 |
JP14 |
pins 1 & 2 closed |
|
Parallel port IRQ select IRQ5 |
JP14 |
pins 2 & 3 closed | |
|
|
Flash BIOS normal mode |
SW1 |
On |
|
Flash BIOS programming mode |
SW1 |
Off | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
(1) 256K x 36 |
NONE |
NONE |
NONE |
|
2MB |
(1) 512K x 36 |
NONE |
NONE |
NONE |
|
3MB |
(1) 512K x 36 |
(1) 256K x 36 |
NONE |
NONE |
|
4MB |
(1) 512K x 36 |
(1) 512K x 36 |
NONE |
NONE |
|
4MB |
(1) 1M x 36 |
NONE |
NONE |
NONE |
|
5MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 256K x 36 |
NONE |
|
6MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
NONE |
|
6MB |
(1) 512K x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
7MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 256K x 36 |
|
8MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
8MB |
(1) 2M x 36 |
NONE |
NONE |
NONE |
|
8MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 1M x 36 |
NONE |
|
10MB |
(1) 512K x 36 |
(1) 2M x 36 |
NONE |
NONE |
|
10MB |
(1) 512K x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
|
12MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
|
12MB |
(1) 1M x 36 |
(1) 2M x 36 |
NONE |
NONE |
|
12MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 2M x 36 |
NONE |
|
12MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 2M x 36 |
NONE |
|
14MB |
(1) 512K x 36 |
(1) 1M x 36 |
(1) 2M x 36 |
NONE |
|
16MB |
(1) 2M x 36 |
(1) 2M x 36 |
NONE |
NONE |
|
16MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 2M x 36 |
NONE |
|
16MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
16MB |
(1) 4M x 36 |
NONE |
NONE |
NONE |
|
18MB |
(1) 512K x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
NONE |
|
20MB |
(1) 1M x 36 |
(1) 4M x 36 |
NONE |
(1) 2M x 36 |
|
20MB |
(1) 1M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
NONE |
|
DRAM CONFIGURATION (CONT) | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
20MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 2M x 36 |
(1) 1M x 36 |
|
24MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 4M x 36 |
NONE |
|
26MB |
(1) 512K x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
NONE |
|
28MB |
(1) 1M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
32MB |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
32MB |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 4M x 36 |
NONE |
|
32MB |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
40MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
48MB |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
48MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
|
64MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 32K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 32K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | ||
|
Size |
JP3 |
JP4 |
|
64KB |
pins 3 & 5, 4 & 6 closed |
Open |
|
128KB |
pins 3 & 5, 4 & 6 closed |
pins 1 & 3, 2 & 4 closed |
|
256KB |
pins 1 & 3, 2 & 4 closed |
pins 1 & 2, 3 & 4, 5 & 6 closed |
|
CPU TYPE CONFIGURATION | |
|
Type |
JP10 |
|
80486SX |
pins 1 & 3, 2 & 4, 8 & 9 closed |
|
80487SX |
pins 3 & 5 closed |
|
80486DX |
pins 1 & 3, 4 & 6, 8 & 9 closed |
|
80486DX2 |
pins 1 & 3, 4 & 6, 8 & 9 closed |
|
Pentium Overdrive |
pins 1 & 3, 2 & 4, 7 & 8, 9 & 10 closed |
|
CPU SPEED CONFIGURATION | |
|
Speed |
JP7 |
|
25MHz |
pins 1 & 2, 3 & 4 closed |
|
33MHz |
pins 3 & 4 closed |
|
40MHz |
pins 1 & 2 closed |
|
50iMHz |
pins 1 & 2, 3 & 4 closed |
|
50MHz |
Open |
|
66iMHz |
pins 3 & 4 closed |
|
VESA WAIT STATE CONFIGURATION | |
|
Wait states |
JP6 |
|
0 wait states |
pins 4 & 6 closed |
|
1 wait state |
pins 2 & 4 closed |
|
BUS SPEED CONFIGURATION | |
|
CPU speed |
JP6 |
|
<= 33MHz |
pins 3 & 5 closed |
|
> 33MHz |
pins 1 & 3 closed |
|
VRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
512KB |
(8) 44256 |
NONE |
|
1MB |
(8) 44256 |
(8) 44256 |
|
VESA VIDEO CONFIGURATION | |
|
Setting |
JP17 |
|
Enabled |
pins 1 & 2 closed |
|
Disabled |
pins 2 & 3 closed |
|
VIDEO CONFIGURATION (86C08051 ONLY) | |
|
Setting |
JP17 |
|
1NS |
pins 10 & 11, 13 & 14 closed |
|
2NS |
pins 11 & 12, 13 & 14 closed |
|
3NS |
pins 10 & 11, 14 & 15 closed |
|
4NS |
pins 11 & 12, 14 & 15 closed |
|
VIDEO FREQUENCY CONFIGURATION | |
|
Size |
JP17 |
|
43Hz |
pins 5 & 6, 8 & 9 closed |
|
56Hz |
pins 4 & 5, 8 & 9 closed |
|
60Hz |
pins 5 & 6, 8 & 9 closed |
|
70Hz |
pins 4 & 5, 7 & 8 closed |
|
72Hz |
pins 4 & 5, 7 & 8 closed |
|
LRDY DELAY CONFIGURATION | ||
|
Type |
JP1 |
JP2 |
|
None |
pins 5 & 6 closed |
Open |
|
2 gate |
pins 3 & 4 closed |
Open |
|
1 CLK |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
2 CLK |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
IDE SPEED CONFIGURATION | |
|
Speed |
JP11 |
|
0 |
pins 3 & 5, 4 & 6 closed |
|
1 |
pins 1 & 3, 4 & 6 closed |
|
2 |
pins 3 & 5, 2 & 4 closed |
|
3 |
pins 1 & 3, 2 & 4 closed |