Search found 22 matches

by Serenarian
Sat May 01, 2021 6:07 pm
Forum: Hints and Tips
Topic: DragonDOS-compatible OS with workspace in high memory?
Replies: 3
Views: 1261

Re: DragonDOS-compatible OS with workspace in high memory?

I found that the link to the DISCUP disk that I used in my previous post doesn't work.

Try this one.

http://archive.worldofdragon.org/archiv ... Disc%20Up/

Peter Mooney
by Serenarian
Sat May 01, 2021 11:04 am
Forum: Hints and Tips
Topic: DragonDOS-compatible OS with workspace in high memory?
Replies: 3
Views: 1261

Re: DragonDOS-compatible OS with workspace in high memory?

@MaestroSoftware Once upon a time, when the Dragon was new (or about 1984/5), my friend Alan Butler and I tackled this problem by patching DragonDos in RAM. We created a program DISCUP which was distributed free to members of The NorthWest TRS-80 User group and Pulser Software. It requires a 64k sys...
by Serenarian
Fri Apr 30, 2021 5:46 pm
Forum: Dragon Hardware
Topic: DragonPlus Original Board 'Fault'?
Replies: 2
Views: 788

Re: DragonPlus Original Board 'Fault'?

I want to thank you for all your hard work deciphering and recreating the DragonPlus board. I own one of the original Compusense boards. In fact the photo in the archive of a mounted board mounted is my Dragon64. I was an early Dragon32 and Dragon64 user and wrote a number of articles and presented ...
by Serenarian
Thu Mar 14, 2019 9:41 am
Forum: Uploads
Topic: AGD converted games: Pack #25 (last one!)
Replies: 4
Views: 2676

Re: AGD converted games: Pack #25 (last one!)

I'd just like to take a moment to say thanks for all your effort in making AGD work on the Dragon - and for the time and trouble taken to make all these games available - truly a major achievement. I may not play the games myself, but its great to have them available. One game I would love to see on...
by Serenarian
Tue Mar 27, 2018 11:30 am
Forum: Dragon General
Topic: Attempting to get a DragonPlus board going ...
Replies: 38
Views: 14285

Re: Attempting to get a DragonPlus board going ...

Re "Your R0 details are incorrect:"

I've just made the correction to my Compusense DragonPlus document to correct the mistake pointed out by Pernod70. Please use this version...

P Mooney
by Serenarian
Mon Mar 26, 2018 9:50 am
Forum: Dragon General
Topic: Attempting to get a DragonPlus board going ...
Replies: 38
Views: 14285

Re: Attempting to get a DragonPlus board going ...

@tjewell It turns out that was easier then I expected. I did make notes (in a school exercise book) ... and I did find them! Here's what I wrote (exactly as it is in my notes) "ALTERATIONS TO OS-9 TO ENABLE IT TO RUN ON AN UPGRADED DRAGON32 The PIA at FF00 -> FF03 uses a pin to check memory size on ...
by Serenarian
Mon Mar 26, 2018 9:27 am
Forum: Dragon General
Topic: Attempting to get a DragonPlus board going ...
Replies: 38
Views: 14285

Re: Attempting to get a DragonPlus board going ...

@tjewell. What did I do to get OS9 to boot on an upgraded Dragon32? Now you're asking! It was 30+ years ago remember and although I made notes of most of the things we did to our software and hardware the Dragon was just a hobby. I was using other computers for work at the time. I will see what I ca...
by Serenarian
Mon Mar 26, 2018 9:17 am
Forum: Dragon General
Topic: Attempting to get a DragonPlus board going ...
Replies: 38
Views: 14285

Re: Attempting to get a DragonPlus board going ...

@Pernod70... You're quite right, the value in R0 is $71. I must be getting dozy in my old age. Actually, i KNOW I am! And my eye sight's going too. I have the sheet of notes I made of the table and should know better - its correct at other places in the document! I did say the document might need ed...
by Serenarian
Mon Mar 26, 2018 12:42 am
Forum: Dragon General
Topic: Attempting to get a DragonPlus board going ...
Replies: 38
Views: 14285

Re: Attempting to get a DragonPlus board going ...

Your figure for the number of pixels per scanline is correct 904 of which 640 are displayed. The second question about R5, is Yes. The value in R5 is required to bring the total up to the PAL video standard of 312 scanlines per field. 312-286=26 or 25 if it is a zero based count ($1A or $19) but som...
by Serenarian
Sun Mar 25, 2018 6:12 pm
Forum: Dragon General
Topic: Attempting to get a DragonPlus board going ...
Replies: 38
Views: 14285

Re: Attempting to get a DragonPlus board going ...

No colour, i'm sorry - and I know that these PROMs were used in some video cabinets to give an RRR GG BBB palette. Maybe there was a plan for that on the DragonPlus . It would have required a second Video RAM bank (like on the IBM MGA board) to hold the corresponding character attributes. The IBM ca...