Am Dienstag, 16. Mai 2023, 21:44:37 CEST schrieb Ullrich von Bassewitz: > On Tue, May 16, 2023 at 09:17:09PM +0200, Rhialto wrote: > > About the banking of the 6509: If you use the STA (zp),Y instruction to > > the effective address $0000 or $0001, does it store in the banking > > register, or does it store in RAM? > > I think there's no way easy way to test this, at least not with a naked 6x0 > because the CPU cannot access the underlying RAM at these addresses. > > Maybe someone with a coprocessor card can run a test? Or someone with a bus > analyzer? I don't know if this has ever been researched. The 5x0 machines have the same CPU, no? Then perhaps it can be tested in the same way we checked it on the C64, using sprites - see https:// sourceforge.net/p/vice-emu/code/HEAD/tree/testprogs/general/ram0001/ -- http://hitmen.eu http://ar.pokefinder.org http://vice-emu.sourceforge.net http://magicdisk.untergrund.net When asked by an anthropologist what the Indians called America before the white men came, an Indian said simply, "Ours." <Vine Deloria, Jr.>Received on 2023-05-16 22:05:37
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