After having built an adapter, I also tried to read the firmware using the included #MACSBUG, but my USB to RS232 adapter didn’t work. Excellent occasion to use the trusty #Olivetti laptop. Rs232 with style! It seems that what I read from the #eproms was ok.

Working With Old High-Voltage EPROMs Is Fussy - EPROMs, those UV-erasable memory chips of the 80s and 90s, once played a crucial r... - https://hackaday.com/2023/03/31/working-with-old-high-voltage-eproms-is-fussy/ #retrocomputing #atari7800 #eproms #eprom