Friends, google has not been kind to me. Looking for the datasheet on the 5380 chip used in my PDP-8/e in the M8650 TTY board..
Run my reply past David Gesswein. But the 5380 on the M8650 schematic, looks a lot like Signetics SP380, down to the pinouts. (don't be confused by OR vs AND, use Boolean logic). you can get SP380's on eBay for several dollars. Or ask some PDP-8 owners. There's also some notes on this page: http://tronola.com/html/ram_for_pdp-8e.html which suggest the DEC S380 is your "5380". Also look at some DEC handbooks about the Omnibus. And of course, stare at your board, see the brand and number on the chips versus names in the schematic. DEC is your friend here, Google merely introduced you to them. ;) Herb Johnson stumbler with 8's -- Herbert R. Johnson, New Jersey in the USA http://www.retrotechnology.com OR .net preserve, recover, restore 1970's computing email: hjohnson AT retrotechnology DOT com or try later herbjohnson AT retrotechnology DOT info
On Sun, Feb 26, 2017 at 05:13:16PM -0500, Herb Johnson via vcf-midatlantic wrote:
Run my reply past David Gesswein. But the 5380 on the M8650 schematic, looks a lot like Signetics SP380, down to the pinouts. (don't be confused by OR vs AND, use Boolean logic). you can get SP380's on eBay for several dollars. Or ask some PDP-8 owners. There's also some notes on this page:
Yes the 5380 is the SP380A. I think the DS8640 will also work.
Herb and David. Great sleuthing! Thanks for figuring that one out for me. I don't think I am in need of one yet, but if I am, thanks to Jonathan for the offer. Eugene -----Original Message----- From: vcf-midatlantic [mailto:vcf-midatlantic-bounces@lists.vintagecomputerfederation.org] On Behalf Of David Gesswein via vcf-midatlantic Sent: Sunday, February 26, 2017 5:32 PM To: Herb Johnson via vcf-midatlantic Cc: David Gesswein Subject: Re: [vcf-midatlantic] DEC 5380 chip On Sun, Feb 26, 2017 at 05:13:16PM -0500, Herb Johnson via vcf-midatlantic wrote:
Run my reply past David Gesswein. But the 5380 on the M8650 schematic, looks a lot like Signetics SP380, down to the pinouts. (don't be confused by OR vs AND, use Boolean logic). you can get SP380's on eBay for several dollars. Or ask some PDP-8 owners. There's also some notes on this page:
Yes the 5380 is the SP380A. I think the DS8640 will also work.
participants (4)
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David Gesswein -
Herb Johnson -
Systems Glitch -
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