DigiTalker National Semiconductor + 2 ROM Chips & Z80A, 8255, RARE USA SELLER For Sale

DigiTalker National Semiconductor + 2 ROM Chips & Z80A, 8255, RARE USA SELLER
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DigiTalker National Semiconductor + 2 ROM Chips & Z80A, 8255, RARE USA SELLER:
$26.95

LIST OF CHIPS FOR SALE & THEIR MARKINGS (ALL CHIPS NEW OLD STOCK IN STATIC FOAM):

1. ) National Semiconductor 54104 mozer /b8327digitalker uspat 4214125 (RARE & HARD TO FIND)

2.) (SPEECH ROM) ami 8516 mac

mm52164-ssr1

p mozer 4,458,110

jameco, belmont ca

phillipines


3.) (SPEECH ROM) ami 8516mad

mm52164-ssr2

p mozer 4,458,110

jameco, belmont, ca

phillipines

4.) (Z80A PROCESSOR) zilog

z8400a ps

z80a cpu

8229


5.) (8255 I/O CHIP) p8255a

949dh90

(c) 1981 amd


DigiTalker is a voice synthesis system National Semiconductor came out with duringthe late 70\'s as a solution to incorporate clear speech into embeddedappliances. The standard vocabulary kit came with 144 pre-loaded words that canbe sequenced and arranged to make basic sentences. And, it sounds really goodeven by today\'s standards, but for one reason or another the product neverreally took off and National discontinued the DigiTalker line somewhere around1990.

An interesting bit of trivia about this device is it hasorigins that can be traced back to someone named Forrest Mozer. The chip evencontains his last name on the top. Mozer was a co-founder of ElectronicSpeech Systems (ESS) and developed the lossy codec that’s used to encodethe speech that’s stored on the ROMs. Apparently,he did most of the encoding himself, by hand! Mozer’s codec went on to givespeech to C64 games like Ghostbusters and Impossible Mission, withoutadditional hardware. The National 54104 DigiTalker was also used in the arcadehit Berzerk.

The chips are marked \"copyright MOZER\". The speechcompression algorithm and codec used in the chips was the brainchild Forest S. Mozer. Hecame up with and patented the methods back in the mid 1970s, in the days ofexpensive memory. He licensed the technology to National Semi for theDigitalker and to other companies as well. He capped his career as a physicist at Berkeley in the Physics Dept. and at the Space Sciences Laboratory, contributingmightily to the measurement of electric fields in plasmas in space (as in theearth\'s aurora). He and his son founded a Silicon Valleycompany, sensory, with a patented speechrecognition technology...

The ROMs were of the Mask Programmable type. They were not\"burned\" by anyone. The ROMs were coded actually by a photo mask inthe manufacturing process in the semiconductor wafer fab.

Also included in this sale is a Zilog Z80A & 8255 parallel I/O chip.

These chips are all in excellent condition! I have had them in my inventory since the 1980\'s.



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