In theory you can create a ROM containing an application for a regular IBM PC as well, and stick it onto an ISA card, as a makeshift ‘cartridge’. In practice it’s just less convenient as you cannot easily insert and remove it. That might explain why the support for DOS command or BASIC expansion ROMs was never added to regular PCs, and as such, remains a PCjr-exclusive.
However, the cartridge port on the PCjr is basically just a cut-down ISA slot. In theory you could create an ISA card with a PCjr-like cartridge slot in the bracket at the back, so that you can insert cartridges with ROMs that way. And once you can easily insert and remove ROMs like that, it makes sense to create ROMs that contain games or other software.
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Python for Microcontrollers – Adafruit Daily — Python on Microcontrollers Newsletter: A New Arduino MicroPython Package Manager, How-Tos and Much More! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi
EYE on NPI – Adafruit Daily — EYE on NPI Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey
