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Re: 65C02 : deduce addressing from opcode ?
- Subject: Re: 65C02 : deduce addressing from opcode ?
- From: "RedskullDC" <RDC@oz.org>
- Date: Tue, 29 Mar 2005 16:06:48 GMT
- Newsgroups: comp.sys.apple2
- Organization: BigPond Internet Services
- References: <Xns96238799A2F3CZoupla@212.27.42.74> <d1uckk$pr9$1$830fa7a5@news.demon.co.uk>
- Xref: g2news1.google.com comp.sys.apple2:9867
>
> I used to know this, but if you look in the Apple ][ Redbook (this is
> online somewhere) the monitor listing contains the disassembler Woz wrote.
> This has details on the exact patterns allowed.
The Woz used some fairly exotic bit-shifting in the dissassembler ,
presumably
for space saving reasons.
The dissassembler source published in the Redbook is of dubious value, since
it does not support the 65C02.
The rom listings in the Apple2C tech ref manual (those that cover the 32k
rom
versions) have a listing for the 65C02 compatible dissassembler within.
It is also worth noting that 65C02's from different manufacturers have
slightly
different instruction sets in the NEW instructions which were added from
the normal 6502.
Cheers,
Red