ScuzzBlog: Diaries November 2020 Entry 14th November 2020: Post 1: A500/A2000 - Mega-Midget Racer. A500/A2000 - Mega-Midget Racer. The Mega-Midget Racer by Computer System Associated Inc. and has the ASSY 21103B plus the CSA Mega-Memory ASSY 21503A S/N B9752. Carrying on with the expansion boards for the A500/A2000 today we have the super fast Mega-Midget Racer by CSA. This board boasts a 68EC030 processor and from the chip looks like the 50MHz one. The daughterboard on these are either 40 or 50 pin depending on whether fitted to the 500 or the 2000. In addition to the 21503A expansion module with soldered ZIP RAM the board has 512K very fast SRAM and which is able to be configured to system RAM. All in all a pretty effective bit of kit. Also has the 68881 FPU. The board connects to the 68000 socket which is replaced onto the board. A basic Amiga system supporting the board operates at a frequency of around 7 MHz, while the Mega-Midget Racer operates at frequencies between 20 and 33 MHz. The MC68030 is operated asynchronously to the Amiga system, which allows the Mega-Midget Racer to operate at many frequencies. The asynchronous operation requires that the accelerator must provide a synchronous bus interface to the Amiga system. This is accomplished with the Mega-Midget Racer's MC68000 bus interface emulator. A500/A2000 - Mega-Midget Racer.

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Last updated 14th November 2020

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