Monday, 1 July 2013

Working COP411 Emulator

As the post title implies, the emulator for the COP411 is now working and here it is.

One oddity is that whilst there are only 32 nibbles of RAM, the mapping actually allows for 64 bits of RAM (Bd is 4 bits, Br is 2 bits).

A consequence of this is that in the map every nibble appears twice - e.g. $00,$08 ... $01,$09 and so on. (The hardware ignores bit 3 of the Bd register).

Now I need to cannibalise the Assembler I wrote for the watch project so it will assemble COP411 assembler. There is actually a working COP411 assembler available, but I want to be able to extend it easily.

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