RE: Detect a C128 from C64 mode

From: Christopher Phillips (
Date: 2003-02-14 17:34:09

How common is the IIe?  I'm not familiar with the revision nomenclature.

> -----Original Message-----
> From: David Wood []
> Sent: 14 February 2003 16:31
> To:
> Subject: Re: Detect a C128 from C64 mode
>Sorry for replying to the middle of the thread,
this reminds me of the TEST bit on the vicIIe.  You can detect a vicIIe by
reading the raster, setting the test bit for a few cycles, and checking the
raster again.  Anyone unfamiliar with this may want to check the 60hz trick
regarding this bit.  It seems while the test bit is set, the vicIIe advance=
one raster per 1mhz cycle(!). ;)
-Virus scanned and cleared ok

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