3 ms·

I had one of these too. The RAM upgrade was a game-console-style cartridge you plugged in one of two (I think) slots on the front of the machine. Edit: oh, an

I had one of these too. The RAM upgrade was a game-console-style cartridge you plugged in one of two (I think) slots on the front of the machine. Edit: oh, and I forgot about the infrared wireless keyboard. So snazzy. [1] [1] http://www.computercloset.org/IBMPCjr.htm http://www.computercloset.org/IBMPCjr.htm

jader201 4y ago
I'm thinking mine was a hardware update, where the case had to be opened. I believe the company we bought it from did the upgrade.
spc476 4y ago
There were two memory upgrades. The first was a card that plugged into the motherboard. The other one was an expansion module that plugged into the side of the computer (and multiple of those could be used). My PCjr had 384k of RAM, using both the internal upgrade and one sidecar. I never bothered using the keyboard wirelessly. The cable was good enough and it saved on batteries. I was fortunate in that I had the revised keyboard, not the original chiclet keyboard.