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 |