SOYO COMPUTER CO., LTD.
SY-23D
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
20/25/33/50(internal)/66(internal)MHz |
|
Chip Set |
ETEQ |
|
Max. Onboard DRAM |
32MB |
|
Cache |
None |
|
BIOS |
AMI |
|
Dimensions |
241mm x 220mm |
|
I/O Options |
None |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
J17 |
External battery |
J20 |
|
Speaker |
J18 |
Turbo switch |
J21 |
|
Reset switch |
J19 |
Turbo LED |
J22 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Monitor type select monochrome |
JP3 |
Open | |
|
Monitor type select color |
JP3 |
Closed | |
|
CMOS memory normal operation |
JP5 |
pins 1 & 2 closed | |
|
CMOS memory clear |
JP5 |
pins 2 & 3 closed | |
|
PGA or PQFP CPU enabled |
J23 |
Open | |
|
PGA CPU enabled, PQFP CPU disabled |
J23 |
Closed | |
|
Note:If using the "PGA or PQFP" setting (J23 open) please note that only one CPU can be installed. | |||
|
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) 256K x 9 |
(4) 1M x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CPU TYPE CONFIGURATION | ||||
|
Type |
JP101 |
JP102 |
JP103 |
JP104 |
|
80486SX |
Open |
pins 2 & 3 closed |
open |
pins 2 & 3 closed |
|
80487SX |
Closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
80486DX |
Closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
ODP486SX |
Closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
80486DX2 |
Closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
CPU SPEED CONFIGURATION | ||||
|
Speed |
OSC U24 |
J24 |
J25 |
J26 |
|
20MHz |
40MHz |
Open |
Closed |
Closed |
|
25MHz |
50MHz |
Closed |
Open |
Closed |
|
33MHz |
66.67MHz |
Closed |
Closed |
Open |
|
50iMHz |
50MHz |
Closed |
Open |
Closed |
|
66iMHz |
66.67MHz |
Closed |
Closed |
Open |
|
Note:The location of socket U24 is unknown. | ||||