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PDP8 Extended Arithmetic Element EAE http://anycpu.org/forum/viewtopic.php?f=17&t=998	Page 1 of 1

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Author:	mmruzek [ Tue Mar 21, 2023 10:44 am ]
Post subject:	PDP8 Extended Arithmetic Element EAE
Here is a rabbit hole for your consideration! The PDP-8 had an optional card set called the EAE for Extended Arithmetic Element. These cards performed asynchronous math calculations as described in the attached screenshot. Better yet, the coding manual and circuit diagrams are available online here: http://vandermark.ch/pdp8/index.php?n=H ... Arithmetic http://vandermark.ch/pdp8/uploads/Hardw ... awings.pdf On the circuit diagrams I see some standard TTL glue logic, counters, multiplexers and some ROMs. I attached a photo of the boards from the links. The circuit diagrams are especially interesting. If you have any other links I'd enjoy seeing them. Thanks! Attachments: PDP8_EAE.png [ 55.37 KiB | Viewed 1581 times ] Photo_EAE.jpg [ 303.58 KiB | Viewed 1581 times ]

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Author:	mmruzek [ Sat Mar 25, 2023 11:42 am ]
Post subject:	Re: PDP8 Extended Arithmetic Element EAE
Just in case someone follows this link while doing a search... here is a detailed explanation of how the EAE works, as posted by a helpful member over at the Vintage Computer Forum. http://vandermark.ch/pdp8/uploads/Emula ... AE-ocr.pdf

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Author:	oldben [ Sat Mar 25, 2023 5:03 pm ]
Post subject:	Re: PDP8 Extended Arithmetic Element EAE
The PDP 8/a had floating point hardware option as well, to give full hardware floating point in the mid 70's. Attachments: File comment: From bitsavers MP00057_FPP8-A_Mar76.pdf [6.3 MiB] Downloaded 249 times

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