[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Intel is lucky they have Apple

Subject: Re: Intel is lucky they have Apple
From: dempson@actrix.gen.nz (David Empson)
Date: Sun, 5 Mar 2006 23:16:33 +1300
Newsgroups: comp.sys.apple2
References: <1141451006.072338.104010@z34g2000cwc.googlegroups.com> <NlnOf.65760$PL5.43382@newssvr11.news.prodigy.com> <ziggy-3C43C7.19384304032006@netnews.asp.att.net> <1hbqixe.1i8p7wy1v17kaoN%dempson@actrix.gen.nz> <mbqdnYJQVJIxBpfZRVn-tg@comcast.com>
User-agent: MacSOUP/2.7 (Mac OS X version 10.4.5)
Xref: g2news1.google.com comp.sys.apple2:5317

Michael J. Mahon <mjmahon@aol.com> wrote:

> Fiddling the 68xx/63xx stack pointer is also the fastest way to do a
> data move--essentially converting it into another index register.

Yes I think that would have worked out faster. Probably didn't think of
it at the time, not much point now.

It would have been rather messy, because we were heavily reliant on
interrupts. It would have required moving in small bursts with
interrupts locked out, switching back to the real stack and sniffing for
interrupts.

-- 
David Empson
dempson@actrix.gen.nz

References:
- Intel is lucky they have Apple
  - From: rander3127@gmail.com
- Re: Intel is lucky they have Apple
  - From: "Bryan Parkoff" <none@nospam.net>
- Re: Intel is lucky they have Apple
  - From: ziggy <ziggy@fakedaddress.com>
- Re: Intel is lucky they have Apple
  - From: dempson@actrix.gen.nz (David Empson)
- Re: Intel is lucky they have Apple
  - From: "Michael J. Mahon" <mjmahon@aol.com>

Prev by Date: Re: Apple II VGA video card and the IIgs
Next by Date: CFFA V2.0
Previous by thread: Re: Intel is lucky they have Apple
Next by thread: Re: Intel is lucky they have Apple
Index(es):
- Date
- Thread