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Re: "Co-Processor" Apple ?
Michael J. Mahon wrote:
Can anyone give me a quick answer about how other accelerators,
both //e and IIgs, temporarily reduce speed? (I would expect that
the IIgs accelerators track the $C036 register, but I have no idea
about the other //e accelerators.)
From the TransWarp manual:
Programmers can also control TransWarp from within their programs by
writing a specific value to a certain memory location. This location,
expressed in hexadecimal notation, is $C074, and in decimal notation,
49268 (-16268 Integer BASIC complement). The valid values which can be
written to this location are 0, 1, or 3. A zero enables the maximum
hardware default speed. A one will cause the TransWarp card to run at
1 MHz. Writing a three will disable the TransWarp card completely and
pass processing control to the Apple�s processor until the TransWarp
is again activated by cold-booting the system. The following example
Applesoft BASIC program line will slow the TransWarp to the 1 MHz
clock rate.
]10 POKE 49268,1
Wayne