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Groups > alt.folklore.computers > #159756
| From | Charlie Gibbs <cgibbs@kltpzyxm.invalid> |
|---|---|
| Newsgroups | alt.folklore.computers |
| Subject | Re: Delay Line Memory |
| Date | 2016-02-19 04:14 +0000 |
| Organization | NewsGuy - Unlimited Usenet $23.95 |
| Message-ID | <na64q80taf@news3.newsguy.com> (permalink) |
| References | <na03mr$ttc$1@dont-email.me> <a96bdf8d-4419-477d-a3d5-6eefc4772139@googlegroups.com> <na0s990oaf@news3.newsguy.com> <na5j3h$2ml$1@dont-email.me> <87lh6hqyjx.fsf@redbull.i-did-not-set--mail-host-address--so-tickle-me> |
On 2016-02-19, Lawrence Statton <lawrence@senguio.mx> wrote:
> "Charles Richmond" <numerist@aquaporin4.com> writes:
>
>> I remember in 1980, seeing an advertisement for a 64k memory board for
>> the S-100 bus. This board had 32 RAM chips, each was 16k x 1 bits,
>> plus associated interface and addressing chips. And the board was
>> *only* $1000 US !!! I was amazed that much memory could be had so
>> cheaply!!!
>
> In fairness - most S100 memory boards used static memory for "good and
> sufficient reason" ("D-Ram timing is *hard*" quoth an engineer friend of
> mine), and perhaps because some of the earliest dynamic boards were
> Unbearably Badly Engineered, buyers were skeptical of them. I had one
> stuffed to the gills with 2114 (1K x 4 in an 18-pin DIP) that was 32K,
> and was hot as a pistol. Those chips were close to half a watt each,
> and sticking 64 of them in a board sucked a few amps off the 8V bus. It
> had two LM323 (TO3 five volt regulator rated for 3A), and each of those
> had a honkin' huge shunt resistor to keep package dissipation down.
>
> Good times...
Yup. When I first built my IMSAI I had two RAM-4A boards, each with
4K worth of 2102s. The regulators ran hot. I replaced it with a
64K static RAM board which I bought with 16K and gradually worked
my way up to 62K, one 2016 at a time (half of the other 2K was for
the 2708 holding the boot code and BIOS, and the other for scratch
RAM for the BIOS). Even fully loaded, the board ran cool.
--
/~\ cgibbs@kltpzyxm.invalid (Charlie Gibbs)
\ / I'm really at ac.dekanfrus if you read it the right way.
X Top-posted messages will probably be ignored. See RFC1855.
/ \ HTML will DEFINITELY be ignored. Join the ASCII ribbon campaign!
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Delay Line Memory "Charles Richmond" <numerist@aquaporin4.com> - 2016-02-16 15:21 -0600
Re: Delay Line Memory Dave Garland <dave.garland@wizinfo.com> - 2016-02-16 15:41 -0600
Re: Delay Line Memory David Wade <dave.g4ugm@gmail.com> - 2016-02-16 22:18 +0000
Re: Delay Line Memory Dan Espen <despen@verizon.net> - 2016-02-16 17:36 -0500
Re: Delay Line Memory Lawrence Statton <lawrence@senguio.mx> - 2016-02-16 16:57 -0600
Re: Delay Line Memory bert <bert.hutchings@btinternet.com> - 2016-02-16 15:08 -0800
Re: Delay Line Memory Bob Eager <news0006@eager.cx> - 2016-02-17 01:31 +0000
Re: Delay Line Memory Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2016-02-17 03:42 +0000
Re: Delay Line Memory Morten Reistad <first@last.name.invalid> - 2016-02-17 00:25 +0100
Re: Delay Line Memory Elliott Roper <nospam@yrl.co.uk> - 2016-02-17 14:03 +0000
Re: Delay Line Memory Anonymous <no_email@invalid.invalid> - 2016-02-17 00:14 +0000
Re: Delay Line Memory Quadibloc <jsavard@ecn.ab.ca> - 2016-02-17 11:46 -0800
Re: Delay Line Memory jhhaynes@earthlink.net - 2016-02-17 18:18 -0800
Re: Delay Line Memory David Wade <dave.g4ugm@gmail.com> - 2016-02-18 09:44 +0000
Re: Delay Line Memory hancock4@bbs.cpcn.com - 2016-02-16 16:43 -0800
Re: Delay Line Memory Anonymous <no_email@invalid.invalid> - 2016-02-17 01:24 +0000
Re: Delay Line Memory Peter Flass <peter_flass@yahoo.com> - 2016-02-16 18:52 -0700
Re: Delay Line Memory Michael Black <et472@ncf.ca> - 2016-02-16 22:19 -0500
Re: Delay Line Memory JimP <solosam90@gmail.com> - 2016-02-17 11:34 -0600
Re: Delay Line Memory Dave Garland <dave.garland@wizinfo.com> - 2016-02-16 20:06 -0600
Re: Delay Line Memory Lawrence Statton <lawrence@senguio.mx> - 2016-02-16 20:23 -0600
Re: Delay Line Memory "hgww" <hgww@gmail.com> - 2016-02-17 14:35 +1100
Re: Delay Line Memory Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2016-02-17 04:17 +0000
Re: Delay Line Memory "Charles Richmond" <numerist@aquaporin4.com> - 2016-02-18 17:14 -0600
Re: Delay Line Memory Lawrence Statton <lawrence@senguio.mx> - 2016-02-18 19:27 -0600
Re: Delay Line Memory Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2016-02-19 04:14 +0000
Re: Delay Line Memory Michael Black <et472@ncf.ca> - 2016-02-19 19:07 -0500
Re: Delay Line Memory Bob Eager <news0006@eager.cx> - 2016-02-17 01:30 +0000
Re: Delay Line Memory "Joe Morris" <j.c.morris@verizon.net> - 2016-02-17 19:11 -0500
Re: Delay Line Memory Michael Black <et472@ncf.ca> - 2016-02-17 23:13 -0500
Re: Delay Line Memory Jon Elson <elson@pico-systems.com> - 2016-02-17 22:25 -0600
Re: Delay Line Memory isw <isw@witzend.com> - 2016-02-17 23:16 -0800
Re: Delay Line Memory Jon Elson <elson@pico-systems.com> - 2016-02-18 12:01 -0600
Re: Delay Line Memory Jon Elson <elson@pico-systems.com> - 2016-02-18 12:10 -0600
Re: Delay Line Memory Lawrence Statton <lawrence@senguio.mx> - 2016-02-18 13:46 -0600
Re: Delay Line Memory Michael Black <et472@ncf.ca> - 2016-02-19 19:13 -0500
Re: Delay Line Memory Quadibloc <jsavard@ecn.ab.ca> - 2016-02-18 04:49 -0800
Re: Delay Line Memory Michael Black <et472@ncf.ca> - 2016-02-19 19:21 -0500
Re: Delay Line Memory Quadibloc <jsavard@ecn.ab.ca> - 2016-02-18 04:51 -0800
Re: Delay Line Memory Michael Black <et472@ncf.ca> - 2016-02-19 19:16 -0500
Re: Delay Line Memory Peter Flass <peter_flass@yahoo.com> - 2016-02-16 18:52 -0700
Re: Delay Line Memory "Charles Richmond" <numerist@aquaporin4.com> - 2016-02-19 20:50 -0600
Re: Delay Line Memory Ahem A Rivet's Shot <steveo@eircom.net> - 2016-02-20 06:31 +0000
Re: Delay Line Memory G. <gerry77@no.spam.mail.com> - 2016-02-17 04:08 +0100
Re: Delay Line Memory Stan Barr <plan.b@bluesomatic.org> - 2016-02-17 08:19 +0000
Re: Delay Line Memory Jon Elson <jmelson@wustl.edu> - 2016-02-17 14:57 -0600
Re: Delay Line Memory "Charles Richmond" <numerist@aquaporin4.com> - 2016-02-19 20:43 -0600
Re: Delay Line Memory isw <isw@witzend.com> - 2016-02-19 22:13 -0800
Re: Delay Line Memory Stan Barr <plan.b@bluesomatic.org> - 2016-02-20 08:17 +0000
Re: Delay Line Memory Lawrence Statton <lawrence@senguio.mx> - 2016-02-20 09:17 -0600
Re: Delay Line Memory Lawrence Statton <lawrence@senguio.mx> - 2016-02-20 09:20 -0600
Re: Delay Line Memory Quadibloc <jsavard@ecn.ab.ca> - 2016-02-20 18:49 -0800
Re: Delay Line Memory isw <isw@witzend.com> - 2016-02-20 21:06 -0800
Re: Delay Line Memory jhhaynes@earthlink.net - 2016-02-17 18:23 -0800
Re: Delay Line Memory isw <isw@witzend.com> - 2016-02-17 23:06 -0800
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