Mega Midget Racer: Am I missing something here?

[Azryl]

It is because of CPU bus, when you have the accelerator plugged into your 68000 cpu socket you only have limited data bandwidth/addressing

Even with the 8meg plugged under the accelerator you are still crippled with normal access to the memory bus, really no faster than the normal 68000 cpu.

The pins on the right hand side of the accelerator are for its own 32bit memory bus addon board. Without this board you will be crippled.

Az

[Azryl]

Problem is NO 32bit ram in the system, just normal chip ram/slow ram

A serious handicap for any accelerator, tho you do get to use 32bit libraries compiled for 020/030.... you get no bonus speed

Az

[Azryl]

It is accessed as if it was chip/slow ram.. so no speed improvement.. sorry

The limit of 2 or 8 or more megabytes has no relation to the speed it is accessed on the system bus.

basically your lovely 32bit 68030 accelerator is stuck in the system bus access mud

Az

[Azryl]

Oh by-the-way you sniped that accelerator away from me on eBay :p
I'm a sort of collector of A500 accelerators, not sure why... it just seems to happen!

Az

[Azryl]

yup.. not sure where you will find the addon board for the mighty midget accelerator, they were rare even when the board was new.

Silly to build it that way because without 32bit ram its very slow. Should have had native 1 or 2meg on the board and extra add-on if needed. Similar to some of the GVP Zorro accelerators.
 
Az