Search found 6 matches

by Jackall
Sat Jun 04, 2022 4:15 pm
Forum: Dragon General
Topic: Unable to boot OS9 on a real D64 using Gotek and FD502 controller
Replies: 6
Views: 4314

Re: Unable to boot OS9 on a real D64 using Gotek and FD502 controller

Gotek is running 3.32. Have also had a go with 4.x. to no avail (also found this version is not yet very stable, and will sometimes go in a boot loop when certain vdk files are selected so switched back to 3.x). In the mean time i am etching a pcb out of https://hardware.speccy.org/temp/Dragon-1.htm...
by Jackall
Fri Jun 03, 2022 8:25 am
Forum: Dragon General
Topic: Unable to boot OS9 on a real D64 using Gotek and FD502 controller
Replies: 6
Views: 4314

Re: Unable to boot OS9 on a real D64 using Gotek and FD502 controller

Hi KenH, Thank you very much for your reply. I have tried the DSK image you attached but it still hangs on the boot screen. Your theory about the drivers makes 100% sense. I have tried a few Dragon Dos rom files from here http://slackbuilds.org/repository/14.2/games/xroar-roms/ onto the eprom of my ...
by Jackall
Thu Jun 02, 2022 3:08 pm
Forum: Dragon General
Topic: Unable to boot OS9 on a real D64 using Gotek and FD502 controller
Replies: 6
Views: 4314

Unable to boot OS9 on a real D64 using Gotek and FD502 controller

Hi, I managed to bring back to life a Dragon 64, bought off ebay listed as for parts, I also have two working D32's. I have managed to boot to OS9 using a COCOSDC, however I cannot get it to boot off a Gotek coupled to a FD502 Disk controller running DOS E7T, Most of the other DSK /VDK work successf...
by Jackall
Thu Feb 22, 2018 3:08 pm
Forum: Dragon General
Topic: Need some help with a repair (blank green screen) (Fixed !!)
Replies: 3
Views: 2931

Re: Need some help with a repair (blank green screen) (Fixed

Thanks Rob,

Soon I will be posting insturctions about making a $2 dragon joystick using an "arduino" joystick, and a "cas" reader to load .cas files
by Jackall
Thu Feb 22, 2018 12:04 pm
Forum: Dragon General
Topic: Need some help with a repair (blank green screen) (Fixed !!)
Replies: 3
Views: 2931

Re: Need some help with a repair (blank green screen) (Fixed

So The problem was resolved last night. It turned out the culprit was RAM Chip IC8 (4116). For anyone facing similar issues I have documented the full troubleshooting process in a blog post here https://blog.johannfenech.com/?p=734 I cannot thank "sorchard" enough for making his hi res schematics, w...
by Jackall
Wed Feb 21, 2018 8:51 am
Forum: Dragon General
Topic: Need some help with a repair (blank green screen) (Fixed !!)
Replies: 3
Views: 2931

Need some help with a repair (blank green screen) (Fixed !!)

Hi All, I have a fully working dragon 32, and got another one off ebay, for spares, but it seems a pity to just dissemble it, so I decided to have a go at it. The dragon powers up to a blank green screen (mainboard is an Issue 6 i believe). IC 12 is missing PIN 19 (MC 6847), but this seems to have b...