On Thu, 16 Feb 2012, ict@ccess wrote:
On Feb 16, 7:29�pm, "Michael J. Mahon" <mjma...@aol.com> wrote:
If there's a one-instruction way, I'd like to know.Have you tried CLC ROR $C036 the rest of the bits are not being used in $C036 and this has no effect on non IIGS computers
As I just mentioned, TSB/TRB for 65C02, 65802 and 65816.$C036 is full of other bits - there's the slot 4/5/6/7 disk-on control, there's the global shadowing bit, the ROM3 motherboard power-on bit, and even one reserved bit. Usually only slot 6 is set for compatibility and the bank shadowing is zero.
Modifying with rotate seems catastrophical to me, even if it doesn't bite you at the instant.
Also, ROR $C036 on non-IIgs computers will toggle the speaker few times. :-) Just as any other access to $C030 .. $C03F.