Last two weeks saw some progress although not the expected.
In the Logisim realm, finally implemented the RET_ADDR register, which, unsurprisingly, stores the return address to be used in the CALL isntructions.
In the breadboards realm, I managed to build the IR (Instruction register), and a (small) part of the registers control logic.
In the "future steps" realm I studied and I am very optimistic about VGA output (maybe 256 x 240 pixels, 256 colors/pixel) and interfacing a regular PS/2 keyboard for input.
That's all people. See you next time.
![](https://cdn.hackaday.io/images/3594331507061169554.jpg)
Instruction register (IR) with 3 chips (each 8 bits) to hold a 24 bit instruction.
![](https://cdn.hackaday.io/images/7325641507061221285.jpg)
IR completed.
![](https://cdn.hackaday.io/images/8597251507061282360.jpg)
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