ProRAM 3000

Hi Res Version (1451 x 603)

The ProRAM 3000, made by Progressive Peripherals & Software, is a full-length Zorro-III memory expansion board designed for the A3000, but can be used in the A4000 as well.

The ProRAM 3000 accepts 1 Meg or 4 Meg 32-pin SIMM modules. The modules are placed in four banks each holding four modules. 1 Meg and 4 Meg modules can be mixed (same type within each bank) so that the board can hold from 4 Mb to 64 Mb of RAM.

Memory on the ProRAM 3000 is not as fast as motherboard memory, about 80% of normal memory speed.

There are 5 jumpers on the board.

Memory Jumpers - 1, 2 and 3

Memory 1Mbx8 4Mbx8 Bank 0 Bank 1 Bank 2 Bank 3 Jumpers
4Mb 4 NONE 1Mbx8 NONE NONE NONE O X X O O
8Mb 8 NONE 1Mbx8 1Mbx8 NONE NONE X O X O O
12Mb 12 NONE 1Mbx8 1Mbx8 1Mbx8 NONE O O X O O
16Mb 16 NONE 1Mbx8 1Mbx8 1Mbx8 1Mbx8 X X O O O
16Mb NONE 4 4Mbx8 NONE NONE NONE X X X O O
20Mb 4 4 1Mbx8 4Mbx8 NONE NONE O X X O O
24Mb 8 4 1Mbx8 1MBx8 4Mbx8 NONE X O X O O
28Mb 12 4 1Mbx8 1Mbx8 1Mbx8 4Mbx8 O O X O O
32Mb NONE 8 4Mbx8 4Mbx8 NONE NONE X X X O O
36Mb 4 8 1Mbx8 4Mbx8 4Mbx8 NONE O X X O O
40Mb 8 8 1Mbx8 1Mbx8 4Mbx8 1Mbx8 X O X O O
48Mb NONE 12 4Mbx8 4Mbx8 4Mbx8 NONE X X X O O
52Mb 4 12 1Mbx8 4Mbx8 4Mbx8 4Mbx8 O X X O O
64MB NONE 16 4Mbx8 4Mbx8 4Mbx8 4Mbx8 X X X O O

(X = on, O = off)

Burst Mode Enable - Jumper 4

OFF = Burst Mode Disabled

ON = Burst Mode Enabled

Memory Link - Jumper 5

OFF = Enable Memory

ON = Disable Memory

Placing a jumper on position 5 will prevent the computer from adding ProRAM's memory to the free memory list. This allows the memory test program to check all the memory on the ProRAM 3000. For normal operation, you must remove this jumper.

Compatibility
The ProRAM is designed for the A3000 but can be used in the A4000 as well. The only problem is that the memory test program does not like the 68040 (probably the Copy Back Mode). The result is that all memory modules are reported as bad. The solution is to boot your computer with a disk without the 68040.library.

Thanks to Svend Daugaar Pedersen