Download a High Res Version
High Res (917x671)
Provides up to 8MB of RAM in the form of ZIPs.
This cards has 5 memory banks known as Shadow, Bank 0, Bank1, Bank2 and Bank3.
The board takes either 256K*4 DRAMs 100ns or faster (eg SIEMENS HYB514256B) for a maximum of 2MB or 1MB*4 DRAMs preferably faster than 100ns (eg TOSHIBA TC514400P) for a maximum of 8MB of RAM. It possible to mix and match the two types, however it may not always work so some experimentation may be needed. It also contains a 68000 at double the clock speed (14Mhz)
Memory Configuration.
Mem Size | BANK 0 | BANK 1 | BANK 2 | BANK 3 | DIP 3-6 1 = ON, 0 = OFF (Ascending Order) |
1 MB | 4x256K*4 | 4x256K*4 | - | - | 0-1-1-1 |
2 MB | 4x256K*4 4x1M*4 |
4x256K*4 | 4x256K*4 | 4x256K*4 | 0-1-0-1 1-0-1-1 |
3 MB | 4x256K*4 | 4x256K*4 | 4x1M*4 | - | 0-1-1-0 |
4 MB | 4x1M*4 | 4x1M*4 | - | - | 0-0-1-1 |
5 MB | 4x256K*4 | 4x256K*4 | 4x1M*4 | 4x1M*4 | 0-1-0-0 |
6 MB | 4x1M*4 | - | 4x1M*4 | 4x1M*4 | 1-0-0-0 |
8 MB | 4x1M*4 | 4x1M*4 | 4x1M*4 | 4x1M*$ | 0-0-0-0 |
Note: For any empty memory banks, all DIP switches should be set to ON. A memory testing program was usually supplied with this board to test for defective memory, in order to use it DIP switch 2 must be set to on.Jumpers J1 and J2 are set at the factory and must not be changed. Pin1 of the jumpers are not clearly identifed, however both jumpers should have the two pins shunted that are farthest away from the J1/J2 labels. All user settings are accomplished using the 6 dip switches.
Thanks to Rainer Kraus and Ron Mascaro