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We haven't got a perfect schematic of Multiface 128. There is a [https://www.worldofspectrum.org/pub/sinclair/technical-docs/Multiface128_Schematics.zip PCB layout] and a [https://www.worldofspectrum.org/pub/sinclair/hardware-info/Multiface128_Manual.pdf manual] on WOS. | We haven't got a perfect schematic of Multiface 128. There is a [https://www.worldofspectrum.org/pub/sinclair/technical-docs/Multiface128_Schematics.zip PCB layout] and a [https://www.worldofspectrum.org/pub/sinclair/hardware-info/Multiface128_Manual.pdf manual] on WOS. | ||
The interface is | The interface is built from 10 [[:Wikipedia:7400-series integrated circuits|74LS]] [[:Wikipedia:Transistor–transistor logic|TTL]] ICs, a [[2764 EPROM|2764]] 8K EPROM and a [[6264 SRAM|6264]] 8K [[:Wikipedia:Static random-access memory|static RAM]]. There are 4 D flip-flop (2x74LS74 IC4 and IC7) to manage RED BUTTON/NMI, stealth mode and store video memory page. | ||
If we observe the PCB plan: | If we observe the PCB plan: |