archive.worldofdragon.org

Thank you very much for all your help! 8-) I don't have a D32 lying around anymore and my D32 schematic is close to unreadable, so I can't help you with finding suitable EPROMs there. I have plenty of D32's lying around. What information do you require in order to help finding suitable EPROMs? Are a...

I tried it on the CoCo 3 and it loads and runs OK, but pressing 'L' does not return to LUTE after you have selected GAMBA or any of the others.

BTW the link has changed to the following.

http://www.6809.org.uk/tmp/da/coco_port ... oco.wav.gz

I suggest that close membership for now and make it so that any potential new members need to write to you vie e-mail first so that you can decide if they are genuine or not.

What do you think?

I would like to buy an EPROM programmer and some EPROM chips suitable for use as replacement BASIC ROMs for the Dragon 32 and 64. Can anyone tell me which EPROM chips I need, and where I could buy them along with a suitable EPROM programmer.

I have a Dragon 64 with a partially working keyboard. The following keys are not working: [12349 Break QRTYI ASDJKL ; Clear ZCB ,]. I have tried swapping the keyboard and examined the circuit board for any obvious problems with the tracks to the keyboard plug (no luck). Looking at the circuit diagra...

Thanks! That makes two of us not having a scope. I will experiment with different methods based on your information.

Thanks for helping with this! I'll attempt to repair it based on your information.

Thanks Alastair, but that machine has gone much worse. It now only works for about 30 seconds before filling the screen with junk and freezing solid.

What's the best way to make it switchable between colour and b/w displays via a switch added to the Dragon's case?

Update: I replaced the LM1889N chip with a new one, but it did not fix the problem.