Re: 65C816 adapter for 6502 computers (aka Apple II)

["Bill Garber" <willy46pa@comcast.net>]

"Wayne Stewart" <waynes@telus.dotnet> wrote in message
news:RNP3c.194157$Hy3.77812@edtnps89...
: Bryan Parkoff wrote:
: > Ouch!!
: >     I am sorry to state.  Unfortunately, 65816 CPU will NOT
WORK on Apple
: > II+ nor Apple //e because 65816 CPU's and 6502 CPU's timing
are not EXACT
: > the same.  They have different nanosecond measurement.  For
example, 6502
: > CPU requires 400 ns to run while 65816 CPU runs 250 ns (I
can't remember
: > exactly.)
: >     "Understanding an Apple //e" manual stated that someone
tried to plug
: > 65C02 CPU into Apple II+, but very several instructions work
while often it
: > crashes at all times.
:
: You might be interested in this site
: http://home.hccnet.nl/g.baltissen/02to816.htm
: I've built and used this adapter and it works quite well in a
IIe
: or II+.
:
: Jim Sather did limited experiments with a few different 65C02
in the
: II+. He certainly didn't try them all.
: A couple of 65C02 that I've used for years in the II+ are the
: GTE G65SC02P-1 and the R65C02

I'm glad you said that works. I have wanted to build
one, but I was afraid I would be wasting my time. Thanks.

Bill @ GarberStreet Enterprizez };-)
Web Site - http://garberstreet.netfirms.com
Email - willy4SPAM6pa@comXcast.net
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