Processor: 040@40Mhz or 040@35Mhz or 040@28Mhz Max Ram: 32MB Ram Type: 8 SIMM Slots
The Fusion Forty is a 32 Bit(Plug & Go)Turbo Card for the A2000, A2000HD & A2500,it first appeared in 1991 from RCS Management in Canada. It has a Motorola 68040 running at 28Mhz and it has 4 Simm sockets allowing upto 32Mb of 32BitRam to be used on the card.It also has a switch on the blanking plate at the back to turn the 68040 processor off, only to be used when the A2000 is switched off!. In the adverts they claimed it was 2-6 times faster than a A3000.
The 4 Simm sockets nearest the blanking plate are the Upper bank and the 4 Simm sockets nearest the 68040 are the Lower bank.
DRAM Config | Lower Bank | Upper Bank |
---|---|---|
4MB | 4MB | --- |
16MB | 16MB | --- |
20MB | 4MB | 16MB |
32MB | 16MB | 16MB |
The DRAM Chips are as follows:
1M X 8bit (page mode) DRAM 80ns or quicker.
4M X 8bit (page mode) DRAM 80ns or quicker
There must always be at least 4MB present in the lower bank for the card to work.
The Fusion Forty has two expansion buses, however it is believed that nothing was ever produced for them and some boards do not even have the pins, just holes where the pins should be. One bus is 36pin and the other is 50pin.
The Fusion Forty has 4 Roms numbered U25 to U28 these are 256kb eproms, used to control the startup of the card.They are compatible with OS2 and OS3.0,but not OS3.1. This card has been reported to have problems with some OS3.1 ROMs (some work, some dont) and may cause the machine not to boot. If you intend to use this card in an OS3.1 machine or intend to upgrade to OS 3.1, try before you buy if possible. They may have been update ROMS to solve this problem, however this has been unconfirmed.
They may have been quicker versions of this card, but again this has been unconfirmed.
Thanks to Sean.