TTL computing

From: Jos Dreesen <>
Date: Wed Apr 10 13:50:23 2002


> The Philips P850 is not microcoded. All other P800 series machines I've
> seen are, but those used either custom Philips bitslice parts (SPALU --
> Scratch Pad Arithmetic Logic Unit) or AM2900 series. I believe the P855
> was a microcoded TTL design, but I don't have the schematics to check
The P856 and P857 are TTL based, microcoded designs.
Both used 4 74181's ( No 2901's) in their ALU and have around 200 TTL on a
single PCB...

Received on Wed Apr 10 2002 - 13:50:23 BST

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