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@jamie@boothcomputing.social
2025-12-18 00:57:04

Well, I had the dip switches set incorrectly and it was trying to test memory that didn't exist. Fixed that and the floppy drives seem to work as well...
I'm also impressed that the Dell System 200 DOS 3.3 Master disk (circa 1987) is still working.
#retrocomputing
#IBM5150

an IBM 5150 with the case open is on the left. A 5151 monitor sits on the carpet to the right. the text in the screen is the MS-DOS welcome banner from my DOS 3.3 master.