One thing you could look at is the BIOS of the 7800. A section of the
BIOS runs a diagnostic on the CPU. Not sure how complete it is, but
might be interesting to look at. You can get the list on my site:
http://www.atarihq.com/danb/a7800.shtml
Dan
> -----Original Message-----
> From: C. Bond [mailto:cbond@xxxxxxxxxxxxx]
> Sent: Wednesday, July 27, 2005 10:31 PM
> To: stella@xxxxxxxxxxxxxxxxxx
> Subject: [personal] [stella] Emulator test program
>
>
> Does anyone know of a 'torture test' for 650x emulators that
> might be available for download? This would be a really handy
> addition to the literature. Programmers familiar with
> floating point routines can find a program called 'paranoia'
> which is often used to confirm the behavior of floating point
> routines. Something similar for emulators would identify
> specific problems quickly and aid in debugging them.
>
> Perhaps someone could suggest a strategy for constructing
> such a test and classifying the result. For example, an
> emulator may just be 'functionally' equivalent to the CPU
> without necessarily being cycle exact. (That would be OK for
> just running many 650x programs.) It may also be cycle-exact,
> but not supporting unofficial opcodes. It may also be
> cycle-exact, with support for unofficial opcodes, but without
> support for some of the page-crossing anomalies of the 650x.
> It may even get all these right, but without the spurious
> reads and writes which the processor actually does in normal
> operation.
>
> A report card issued after checking and confirming all these
> possibilities would allow emulator writers to set the bar
> where they want and confirm their progress at achieving it.
>
>
> --
> Democracy: The triumph of popularity over principle.
> --
> http://www.crbond.com
>
>
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