Blizzard 1230-II


Reverse Side as shown in trapdoor slot: Thanks to Daniel O'Conner

Processor: EC030@40Mhz, or 030@50Mhz
FPU: Optional (both PGA and PLCC sockets)
Max Ram: 64MB
Ram Type: 2x72Pin SIMM slots.
Fast SCSI-II: Optional

The memory on this board is configured via jumpers.

Aswell as a connector for the SCSI-2 there is anothe expansion connector on this board. The purpose of this connector was for future expansions but I do not know of any that exist.

Also contains a MAPROM jumper for copying the kickstart into fast ram to speed up machine performance.

Jumper Settings



MAPROM

    If memory is installed on the Blizzard 1230-II you can load Kickstart into the faster RAM to speed up the execution of operating system functions. If the MAPROM jumper is removed, Kickstart will be automatically copied over to the RAM. If the jumper is installed Kickstart will be executed on the ROM.



FPU-Clock

    In position 2-3 the co-processor is operated synchronously, with the central processor clock. If you want to use a co-processor with another clock rate this jumper must be set to position 1-2. For asynchronous operation a second oscillator must be installed.



RAM Configuration


Bank1 Bank2 Jumper total
leer leer 0MB
1MB leer 1MB
2MB leer 2MB
4MB leer 4MB
8MB leer 8MB
16MB leer 16MB
32MB leer 32MB
1MB 1MB 2MB
2MB 1MB 3MB
4MB 1MB 5MB
8MB 1MB 9MB
16MB 1MB 17MB
32MB 1MB 33MB
2MB 2MB 4MB
4MB 2MB 6MB
8MB 2MB 10MB
16MB 2MB 18MB
32MB 2MB 34MB
4MB 4MB 8MB
8MB 4MB 12MB
16MB 4MB 20MB
32MB 4MB 36MB
8MB 8MB 16MB
16MB 8MB 24MB
32MB 8MB 40MB
16MB 16MB 32MB
32MB 16MB 48MB
32MB 32MB 64MB