From: cowan@mercury.ccil.org (John Cowan)
Subject: [TUHS] Happy Programmers' Day!
Date: Wed, 16 Sep 2015 08:54:25 -0400 [thread overview]
Message-ID: <20150916125424.GA3771@mercury.ccil.org> (raw)
In-Reply-To: <20150916031030.GH81320@eureka.lemis.com>
Greg 'groggy' Lehey scripsit:
> Clearly a reference to Dave H's PDP-8 with its 16 word (24 byte) RIM
> loader.
The RK8E bootstrap for OS/8 was even shorter: just two instructions.
The first loaded a block from the disk (you forced it to be block 0 loaded
at address 0 of field 0 by using the CLEAR key on the front panel first),
and the second was jump-to-self, which executed until the disk overwrote
it with code that waited until the block had been loaded and then continued
executing the newly loaded code.
--
John Cowan http://www.ccil.org/~cowan cowan at ccil.org
Uneasy lies the head that wears the Editor's hat! --Eddie Foirbeis Climo
next prev parent reply other threads:[~2015-09-16 12:54 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-12 21:49 Norman Wilson
2015-09-15 14:10 ` Dave Horsfall
2015-09-15 15:27 ` scj
2015-09-16 3:10 ` Greg 'groggy' Lehey
2015-09-16 12:54 ` John Cowan [this message]
-- strict thread matches above, loose matches on Subject: below --
2015-09-16 2:13 Doug McIlroy
2015-09-12 21:26 Dave Horsfall
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