CHEERFUL INTERNATIONAL CORPORATION
S680
|
Processor |
80386SX |
|
Processor Speed |
16MHz |
|
Chip Set |
Intel |
|
Max. Onboard DRAM |
2MB |
|
Cache |
None |
|
BIOS |
AMI |
|
Dimensions |
330.2mm x 218.4mm |
|
I/O Options |
None |
|
NPU Options |
80387SX |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Reset switch |
CN1 |
Speaker |
CN4 |
|
Turbo switch |
CN2 |
Power LED & keylock |
CN7 |
|
Turbo LED |
CN3 |
External battery |
CN8 |
|
Note:CN2 can be connected to a turbo switch, however the manufacturer recommends that the computer be turned off before changing the CPU speed. | |||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
CPU speed select fast |
CN2 |
closed | |
|
CPU speed select slow |
CN2 |
open | |
|
Battery select internal |
CN9 |
pins 2 & 3 closed | |
|
Battery select external |
CN9 |
pins 1 & 2 closed | |
|
Monitor type select monochrome |
JP2 |
open | |
|
Monitor type select color |
JP2 |
closed | |
|
BIOS type select 2764 |
JP4 |
pins 1 & 2 closed | |
|
BIOS type select 27128 |
JP4 |
pins 2 & 3 closed | |
|
Factory configured - do not alter |
JP10 |
unknown | |
|
Factory configured - do not alter |
JP11 |
unknown | |
|
Factory configured - do not alter |
JP12 |
unknown | |
|
DRAM CONFIGURATION | |||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
E1 - E8 |
|
512KB |
(18) 41256 |
NONE |
NONE |
NONE |
pins 1 & 2 closed |
|
512KB |
NONE |
NONE |
(2) 256K x 9 |
NONE |
pins 2 & 3 closed |
|
1MB |
(18) 41256 |
(18) 41256 |
NONE |
NONE |
pins 1 & 2 closed |
|
1MB |
NONE |
NONE |
(2) 256K x 9 |
(2) 256K x 9 |
pins 2 & 3 closed |
|
1.5MB |
(18) 41256 |
(18) 41256 |
(2) 256K x 9 |
NONE |
pins 1 & 2 closed |
|
2MB |
(18) 41256 |
(18) 41256 |
(2) 256K x 9 |
(2) 256K x 9 |
pins 1 & 2 closed |
|
2MB |
(18) 411000 |
NONE |
NONE |
NONE |
pins 1 & 2 closed |
|
2MB |
NONE |
NONE |
(2) 1M x 9 |
NONE |
pins 2 & 3 closed |
|
4MB |
(18) 411000 |
(18) 411000 |
NONE |
NONE |
pins 1 & 2 closed |
|
4MB |
NONE |
NONE |
(2) 1M x 9 |
(2) 1M x 9 |
pins 2 & 3 closed |
|
6MB |
(18) 411000 |
(18) 411000 |
(2) 1M x 9 |
NONE |
pins 1 & 2 closed |
|
8MB |
(18) 411000 |
(18) 411000 |
(2) 1M x 9 |
(2) 1M x 9 |
pins 1 & 2 closed |
|
DRAM MODE CONFIGURATION | |||
|
Mode |
DRAM type |
JP8 |
JP9 |
|
Page Mode (Four page) |
100ns |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
Page Mode (One page) |
100ns |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
Fast mode |
100ns |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
Slow mode |
120ns |
pins 2 & 3 closed |
pins 2 & 3 closed |