From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-0.9 required=5.0 tests=BAYES_00,FORGED_GMAIL_RCVD,
	FREEMAIL_FROM autolearn=no autolearn_force=no version=3.4.4
X-Received: by 2002:ac8:410f:: with SMTP id
 q15mr13748952qtl.192.1579386009108;
        Sat, 18 Jan 2020 14:20:09 -0800 (PST)
X-Received: by 2002:a9d:74c4:: with SMTP id a4mr11151311otl.119.1579386008844;
 Sat, 18 Jan 2020 14:20:08 -0800 (PST)
Path: 
 eternal-september.org!reader01.eternal-september.org!feeder.eternal-september.org!news.gegeweb.eu!gegeweb.org!usenet-fr.net!proxad.net!feeder1-2.proxad.net!209.85.160.216.MISMATCH!g89no10680829qtd.0!news-out.google.com!w29ni1698qtc.0!nntp.google.com!g89no10680818qtd.0!postnews.google.com!google-groups.googlegroups.com!not-for-mail
Newsgroups: comp.lang.ada
Date: Sat, 18 Jan 2020 14:20:08 -0800 (PST)
In-Reply-To: <0001HW.23D35416021671CF70000511B2EF@news.individual.net>
Complaints-To: groups-abuse@google.com
Injection-Info: google-groups.googlegroups.com; posting-host=47.136.24.151;
 posting-account=o_Y23woAAACPYGlDsFV1OivhygPNSoRn
NNTP-Posting-Host: 47.136.24.151
References: <f531cd40-6734-46cb-967e-638cf1004426@googlegroups.com>
 <ly7e1pyn71.fsf@pushface.org>
 <4b0649b3-aed2-44fd-822f-d6665b9352dd@googlegroups.com>
 <0001HW.23D35416021671CF70000511B2EF@news.individual.net>
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <c3b114c4-2b5e-4788-91df-736914aaaca0@googlegroups.com>
Subject: Re: Creating several types from a base type and conversion
From: Ken Roberts <alisonken1@gmail.com>
Injection-Date: Sat, 18 Jan 2020 22:20:09 +0000
Content-Type: text/plain; charset="UTF-8"
Xref: reader01.eternal-september.org comp.lang.ada:57883
Date: 2020-01-18T14:20:08-08:00
List-Id: <comp.lang.ada>

On Saturday, January 18, 2020 at 6:56:24 AM UTC-8, Bill Findlay wrote:
> On 18 Jan 2020, Ken Roberts wrote
> (in article<4b0649b3-aed2-44fd-822f-d6665b9352dd@googlegroups.com>):
> 
> > The concept is emulating a 30-bit computer from olden days.
> >
> > It was my understanding that a boolean array would be better than an
> > integer in order to do some of the bit manipulations that the old
> > computer was designed for.
> 
> Use the type:
> 
> mod 2**30
> 
> which provides all the bit handling you need.
> Override the arithmetic operations with your own 1's complement versions.
> Roberto es su tio.
> 
> For an Ada 2012 emulator of a 48-bit machine, see:
> 
> <http://www.findlayw.plus.com/KDF9/emulation/emulator.html>
> 
> -- 
> Bill Findlay

Thanks for the link - will look into it.