[Coco] Learning CPU Architecture and Digital Design

[Mark McDougall]

On 20/02/2013 3:21 AM, jdaggett at gate.net wrote:

> John Kent's open source core is widely accepted. It is now very stable
> and while not 100% cycle accurate, it is very close as of the last time I
> looked at it. There were a few opcodes that executed one or two cycles
> faster.

It makes a mess of the Vectrex graphics, so I'm not sure it's that close to 
being cycle accurate. Either that, or the Vectrex BIOS drawing routines 
happen to make heavy use of the instructions that aren't accurate!?!

Regards,

-- 
|              Mark McDougall                | "Electrical Engineers do it
|  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"