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 |