MikroLeo, A 4-Bit Retro Learning Platform

MikroLeo is a discrete TTL logic-based mostly microcomputer supposed for instructional functions produced by [Edson Junior Acordi], an Electronics Professor at the Brazilian Federal Institute of Paraná, Brazil. The 4-bit CPU has a Harvard RISC architecture developed entirely from 74HCT collection logic mounted on a two-sided PCB employing only by way of-gap parts. With 2K words of instruction RAM and 2K words of addressable RAM, the CPU has a similar source amount to equivalent equipment of old, giving pupils a sense for how to operate inside of tight constraints.

Simulation of the circuit is achievable with electronic, with the dedicated PCB built with KiCAD, so there should really be adequate there to get cracking with it. Four 4-little bit IO ports make interfacing easy, with committed Enter and OUTput guidelines for the reason. An assembler, compiler, and emulator are all being labored on (as far as we can inform) so hold an eye out for that, if this job is of desire to you.

We like computer systems a bit around these elements, the “hackier” and weirder the better. Even just in the 4-bit retro area, we have found so a lot of, from those constructed all-around ancient ALU chips to those designed from discrete transistors and diodes, but you never require to go down that street, an emulation platform can scratch that retro itch, without the very same stage of ache.