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When my Duo 230 boots up, I've noticed this reported in the About screen: 24-bit addressing => System 7.5.5 uses about 18~19 MB of RAM. 32-bit addressing =>System 7.5.5 uses about 2.5~2.6 MB of RAM. This machine has 24 MB of memory between onboard and expansion module. So this makes a pretty...

Growing up in front of a Tandy 1000 with a single 5 1/2” drive as part of a PC family, it was well into the OS X era of the iMac and MacBook by the time I met anything Macintosh. By then I was already focused on BSD and Linux systems, so I largely missed the classic operating system. Probably...

Recently acquired an old Duo 230, and trying to make it operational piece by piece. Since the original charger went poof shortly after test booting the machine: my power solution for testing has been an old Wallstreet series charger. Pretty much, I was just glad the charger wasn’t still plugged...