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

Arthur Flexser flexser at fiu.edu
Tue Jan 22 17:23:56 EST 2008


On Tue, 22 Jan 2008, Darren A. wrote:

> 
> I can reproduce this reliably on my 128K CoCo3. So far, nobody else has
> reported their results.
> 
> In all my tests, when a LDB ,X instruction is executed with $FFA0 in X, bits
> 6-7 of the value loaded into B match bits 6-7 of the next instruction
> opcode.
> 
So, are you saying that it makes no difference whether LDB ,X or LDB 0,X is
used, because it's the opcode AFTER this instruction that is the critical one,
rather than the postbyte?

Art





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