🇸🇰 SMEP PP 01: Part 8 (Small Progress) [TCE #0515]
31Thanks to #PCBWAY for helping with this project!
Made a little more progress - obtained the obsolete ICs but still need to obtain the Tesla connectors, specifically:
Tesla TX5164812 (2x24 pin) for the EPROM module
Tesla TY5273011 (2x15 pin) for the keyboard
I ended up getting mostly Western-equivalent parts for the ICs from Unicorn Electronics in the US:
Tesla MH7400S = 74S00 quad NAND
Tesla MH7403S = 74S03 quad NAND (open collector)
Tesla MH7404S = 74S04 hex inverter
Tesla MH74154 = 74154 4-to-16 decoder
Tesla MH3205 = Intel 8205 high speed 1-of-8 decoder
Tesla MH3212 = Intel 8212 or 74S412 8-bit input/output port
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From Part 7:
Thanks to Peter, Jeramy & #PCBWAY for all their help ...
[1] Peter at www.sapi.cz for providing his original keyboard schematic;
[2] Jeramy @JVHShack for patiently re-designing to accept Cherry MX key switches; and
[3] PCBWAY for fabbing and shipping the boards to me for free!
Obviously my PP01 still needs a lot of work to get up and running (hopefully!) again.
But it'll be interesting to see it working with a modern keyboard.
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From Part 1:
SMEP = Systém Malých Elektronických Počítačov (Small Electronic Computer System), and
PP 01 = Personálny Počítač (Personal Computer).
It was developed at the Computing Technology Research Institute (Výskumnom Ústave Výpočtovej Techniky = VÚVT) in Žilina and manufactured at the Computing Technology Plant (Závodoch Výpočtovej Techniky = ZVT) in Banská Bystrica (now in independent Slovakia).
A good source of information & emulator:
https://pp01.borik.net/index.php
An excellent set of re-drawn schematics can be found here:
https://www.sapi.cz/klony_sm5040/pp01...
ROM board:
https://www.8bity.cz/2019/nhrada-desk...
SD-ROM module:
https://pp01.borik.net/index.php?pg=s...
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Music by Karl Casey @ White Bat Audio
https://karlcasey.bandcamp.com
/ @whitebataudio