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/
prev 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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