TWINHEAD INTERNATIONAL CORPORATION
CT-6280
|
Card Type |
Memory card |
|
Chip Set |
Unidentified |
|
Maximum Onboard Memory |
640KB |
|
Data Bus |
8-bit ISA |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
Factory configured - do not alter |
SW1/7 |
Unidentified | |
|
Parity check enabled |
SW1/8 |
On | |
|
Parity check disabled |
SW1/8 |
Off | |
|
DRAM CONFIGURATION | |||
|
Size |
Bank 1 |
Bank 2 |
Bank 3 |
|
0KB |
None |
None |
None |
|
64KB |
64KB |
None |
None |
|
128KB |
64KB |
64KB |
None |
|
192KB |
64KB |
64KB |
64KB |
|
256KB |
256KB |
None |
None |
|
320KB |
256KB |
64KB |
None |
|
384KB |
256KB |
64KB |
64KB |
|
448KB |
256KB |
256KB |
None |
|
512KB |
256KB |
256KB |
None |
|
576KB |
256KB |
256KB |
64KB |
|
640KB |
256KB |
256KB |
256KB |
|
Note: It is recommended that 4164 or 4125 RAM chips of 150ns or faster be used. | |||
|
DRAM JUMPER CONFIGURATION | ||||
|
Size |
SW1/3 |
SW1/4 |
SW1/5 |
SW1/6 |
|
0KB |
Off |
Off |
Off |
Off |
|
64KB |
On |
Off |
Off |
Off |
|
128KB |
Off |
On |
Off |
Off |
|
192KB |
On |
On |
Off |
Off |
|
256KB |
Off |
Off |
On |
Off |
|
320KB |
On |
Off |
On |
Off |
|
384KB |
Off |
On |
On |
Off |
|
448KB |
On |
On |
On |
Off |
|
512KB |
Off |
Off |
Off |
On |
|
576KB |
On |
Off |
Off |
On |
|
640KB |
Off |
On |
Off |
On |
|
STARTING ADDRESS SELECTION | ||
|
Address |
SW1/1 |
SW1/2 |
|
00000h (0KB) |
Off |
Off |
|
10000h (64KB) |
On |
Off |
|
20000h (128KB) |
Off |
On |
|
40000h (256KB) |
On |
On |