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From: Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject: Re: SweetAda 0.1e released
Date: Mon, 27 Jul 2020 12:53:24 -0400	[thread overview]
Message-ID: <6b1uhfh9j4sob0stak1n616dr8uirj2dio@4ax.com> (raw)
In-Reply-To: 1603a778-dc76-4c82-88f2-872212871b65n@googlegroups.com

On Mon, 27 Jul 2020 07:02:45 -0700 (PDT), Roger Mc <rogermcm2@gmail.com>
declaimed the following:


>Many thanks for this which I will study in detail. Nothing is trivial. My "level of knowledge" in this context is low.
>I have been confusing the PIC (programmable interrupt controller) in the PC chipset) with a PIC microcontroller which I thought i8259 PIC was referring to.

	Heh -- until the interrupt controller was called out, when following
this thread, my first thought for PIC was Position-Independent-Code
(something more commonly found in Motorola instruction sets than Intel --
jumps/branches/calls being done relative to current Program Counter value,
not to absolute memory addresses. The reviled segmented memory of the 8086
offered a form of PIC -- code running in 64kB could be loaded on any
16-byte multiple, with the relevant segment register set to the start of
that boundary)


-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
	wlfraed@ix.netcom.com    http://wlfraed.microdiversity.freeddns.org/

      parent reply	other threads:[~2020-07-27 16:53 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-22 18:03 SweetAda 0.1e released gabriele.galeotti.xyz
2020-07-25 13:44 ` Roger
2020-07-25 16:07   ` gabriele.galeotti.xyz
2020-07-25 16:17   ` gabriele.galeotti.xyz
2020-07-26  1:51     ` Roger Mc
2020-07-26 13:17       ` Roger Mc
2020-07-27 10:59         ` gabriele.galeotti.xyz
2020-07-27 10:51       ` gabriele.galeotti.xyz
2020-07-27 11:34         ` Roger Mc
2020-07-27 13:18           ` gabriele.galeotti.xyz
2020-07-27 14:02             ` Roger Mc
2020-07-27 16:04               ` gabriele.galeotti.xyz
2020-07-28  0:06                 ` Roger Mc
2020-07-28  9:16                   ` gabriele.galeotti.xyz
2020-07-28 13:32                     ` Roger Mc
2020-07-27 16:53               ` Dennis Lee Bieber [this message]
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