[Coco] "Reading" non-readable bytes with PEEK vs ZBUG

[Darren A.]

> 
> Does it make any difference in these tests if the CPU is in double-speed mode?
> 

--

No Roger. I have tested it on a 128K CoCo3 68B09 at both speeds. There is no difference in behavior. I believe Robert G. has confirmed that the same results are seen on a 6309 in emulation mode (don't know about native mode).

One thing to consider about your LOADM trick is that the behavior is dependant on the sequence of instructions executed. Chances are fairly good that all third-party versions of Disk Basic have simply copied the LOADM code used in Tandy's version, but that's just a guess. As someone stated in a previous post, creating a process that relies on some undefined behavior makes the entire process undefined.

Darren


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