Re: [stella] 6502 guru's...

Subject: Re: [stella] 6502 guru's...
From: "doppel" <gentlben@xxxxxxxxxxxx>
Date: Sat, 15 Jul 2000 10:14:19 -0700
> I was looking at some datasheets for the more recent versions of the 6502,
> and noticed a few neumonics I hadn't seen before. BBR0-7 and
> BBS0-7.  They are branch on bit 0(-7) reset, or bit 0(-7) set.  The
> datasheet makes note of the instructions that are new from the original
> 6502, but these are not marked as such.(they are opcodes 0F-FF)

> Does anyone know if these are supported in the 6507(original 6502)?  Does
> anyone have the datasheet for the original 6502?

those were the datasheets for the 65C02, a CMOS version of the 6502.  the
BBR0-7 and BBS0-7 instructions are not supported on the original NMOS 6502,
or on the 6507.  sorry to disappoint you.


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