Anonymous

Changes

Multiface

No change in size, 17:35, 27 May 2017
m
Fix typo: sthealt -> stealth
We haven't got a perfect schematic of Multiface 128. There is a [http://www.worldofspectrum.org/pub/sinclair/technical-docs/Multiface128_Schematics.zip PCB layout] and a [http://www.worldofspectrum.org/pub/sinclair/hardware-info/Multiface128_Manual.pdf manual] on WOS.
The interface is build up 10 [http://en.wikipedia.org/wiki/7400_series 74LS] [http://en.wikipedia.org/wiki/Transistor%E2%80%93transistor_logic TTL] ICs, a [[2764 EPROM|2764]] 8K EPROM and a [[6264 SRAM|6264]] 8K [http://en.wikipedia.org/wiki/Static_random-access_memory static RAM]. There are 4 D flip-flop (2x74LS74 IC4 and IC7) to manage RED BUTTON/NMI, sthealt stealth mode and store video memory page.
If we observe the PCB plan:
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