add read-only jumper please

tjboldt / Apple2-IO-RPi

Apple II expansion card using a Raspberry Pi for I/O

MIT License

119 stars 13 forks source link

add read-only jumper please #147

Closed JPT77 closed 2 months ago

JPT77 commented 11 months ago

What do suggest for improvement?

There are circumstances where the first byte of the ROM is overriden. I got a report, where this happens when CP/M is booted. I myself experience it every now and then.

A simple solution would be to have a jumper that allows or forbids writing to the EEPROM from the apple.

thank you very much

tjboldt commented 11 months ago

This is a great suggestion. I'll make up a new board design soon.

JPT77 commented 11 months ago

Until then, here is a workaround that regularly fixes the first byte automatically: https://forum.classic-computing.de/forum/index.php?thread/29134-rgbtohdmi-platine-apple2-io-rpi-usw-status/&postID=435751#post435751