Comments on: Epson HX-20 https://dathsgarage.dk/retro-computer-collection/computers/others/epson-hx-20/ Projects from my garage Mon, 26 Jan 2026 13:37:11 +0000 hourly 1 https://wordpress.org/?v=6.5.7 By: Mike https://dathsgarage.dk/retro-computer-collection/computers/others/epson-hx-20/#comment-69 Mon, 27 Dec 2021 10:02:40 +0000 http://dathsgarage.dk/?p=1260#comment-69 Thanks for the links! That manual was very helpful. I’ve had one of these computers sitting in the corner of my office for the past 30 years. I can’t say when was the last time it was turned on. It had a custom CMOS in it from Miyano (a CNC machine manufacturer) as they sold it as an optional unit for their machines. I remember my father using it to edit/load/save programs to and from our Miyano machine.

I just charged it back up and turned it on. Yep. I got the same TRAP! error. To fix this, shut the computer back off, press and release the reset button (in case CPU is stuck in a loop). Now turn on the computer and the moment you see “Initialize” press [Crtl] + [@] together at the same time. At this point it should now ask you for the date/time. Enter that, and then continue on to reinitialize the memory (aka a factory reset).

I was then able to load one of my dad’s old programs off of a cassette I found and even print it out! Yes both the tape drive and the printer still worked (even the 30 year old ink!). Now I need to look at the tape drive motor. It’s noisy as sin, and I can’t get the display to darken (adjusting knob only makes it lighter). So I may pop this puppy apart and give it a good cleaning.

]]>