EFA CORPORATION
ECA 33M50
|
Processor |
80386DX/80486SX/80486DX |
|
Processor Speed |
16/20/25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
UMC |
|
Max. Onboard DRAM |
32MB |
|
SRAM Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
J1 |
Turbo LED |
J4 |
|
Speaker |
J2 |
Turbo switch |
J5 |
|
Reset switch |
J3 |
External battery |
J17 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
| » |
Monitor type select monochrome |
J16 |
open |
|
Monitor type select color |
J16 |
closed | |
| » |
Factory configured - do not alter |
J21 |
open |
|
BIOS type select 64K |
J22 |
pins 2 & 3 closed | |
|
BIOS type select 128K |
J22 |
pins 1 & 2 closed | |
|
SRAM CONFIGURATION | ||||
|
Size |
Cache SRAM |
Location |
TAG (U22) |
TAG (U24) |
|
64KB |
(8) 8K x 8 |
Banks 0 & 1 |
(1) 32K x 8 |
(1) 16K x 4 |
|
128KB |
(4) 32K x 8 |
Bank 0 |
(1) 32K x 8 |
(1) 16K x 4 |
|
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(1) 32K x 8 |
(1) 16K x 4 |
|
SRAM JUMPER CONFIGURATION | |||||||||
|
Size |
J7 |
J8 |
J9 |
J10 |
J11 |
J12 |
J13 |
J14 |
J15 |
|
64KB |
2 & 3 |
2 & 3 |
open |
open |
open |
open |
closed |
1 & 2 |
open |
|
128KB |
1 & 2 |
2 & 3 |
open |
closed |
open |
closed |
closed |
2 & 3 |
1 & 2 |
|
256KB |
1 & 2 |
1 & 2 |
closed |
closed |
closed |
closed |
closed |
1 & 2 |
2 & 3 |
|
Note:Pins designated should be in the closed position. | |||||||||
|
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 |
|
5MB |
(4) 1M x 9 |
(4) 256K x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CPU TYPE CONFIGURATION | ||||||
|
CPU |
S1 switch 1 |
S1 switch 2 |
S1 switch 3 |
S1 switch 4 |
S2 switch 1-6 |
Jumper J23 |
|
80486DX2 |
closed |
closed |
open |
open |
open |
pins 1 & 2 |
|
ODP486SX |
closed |
closed |
open |
open |
open |
pins 2 & 3 |
|
80486DX |
closed |
closed |
open |
open |
open |
pins 1 & 2 |
|
80487SX-25 |
closed |
closed |
open |
open |
open |
pins 2 & 3 |
|
80487SX-20 |
closed |
closed |
open |
closed |
open |
pins 2 & 3 |
|
80486SX-25 |
open |
open |
closed |
open |
open |
open |
|
80486SX-20 |
open |
open |
closed |
closed |
open |
open |
|
80386DX |
closed |
closed |
open |
open |
closed |
N/A |
|
CPU SPEED CONFIGURATION | ||||||
|
CPU |
iOSC SPEED |
S3 switch 1 |
S3 switch 2 |
S3 switch 3 |
S3 switch 4 |
S2 switchs 1-6 |
|
80486DX2-50 |
25MHz |
closed |
closed |
open |
closed |
open |
|
ODP486SX-66 |
33MHz |
closed |
open |
closed |
closed |
open |
|
ODP486SX-50 |
25MHz |
closed |
closed |
open |
closed |
open |
|
80486DX-50 |
50MHz |
open |
open |
open |
open |
open |
|
80486DX-33 |
33MHz |
closed |
open |
closed |
closed |
open |
|
80486DX-25 |
25MHz |
closed |
closed |
open |
closed |
open |
|
80487SX-25 |
25MHz |
closed |
closed |
open |
closed |
open |
|
80487SX-20 |
40MHz |
open |
open |
closed |
open |
open |
|
80486SX-25 |
25MHz |
closed |
closed |
open |
closed |
open |
|
80486SX-20 |
40MHz |
open |
open |
closed |
open |
open |
|
80386DX-40 |
80MHz |
closed |
open |
open |
open |
closed |
|
80386DX-33 |
66MHz |
open |
open |
open |
closed |
closed |
|
80386DX-20 |
20MHz |
closed |
closed |
closed |
open |
closed |
|
80386DX-16 |
16MHz |
closed |
closed |
closed |
closed |
closed |