Search found 530 matches

by sorchard
Thu Mar 21, 2024 10:51 pm
Forum: Dragon Hardware
Topic: Finally tested 256K
Replies: 6
Views: 193

Re: Finally tested 256K

Excellent work as usual Ciaran 8-)
robcfg wrote: Fri Mar 15, 2024 7:16 pm Tell me more about that mini keyboard of yours :mrgreen:
Just a little something for the lulz. Details here: https://gitlab.com/sorchard001/mini-dragon-keyboard
by sorchard
Tue Mar 05, 2024 4:45 pm
Forum: Software Requests
Topic: Flex PL9
Replies: 5
Views: 138

Re: Flex PL9

Not sure if you were specifically interested in the Dragon version but there is a lot of PL9 stuff here:

https://www.simonwynn.com/flex

(In fact a *LOT* of Flex images in general)
by sorchard
Mon Jan 29, 2024 9:27 am
Forum: Dragon Hardware
Topic: Dragon Beta GitHub
Replies: 33
Views: 32479

Re: Dragon Beta GitHub

Looking good Rob! I think the two DRAM types are nearly equivalent, or at least I'm sure I've had both types in my Dragons. I found this handy reference the other day. Might be of use: https://minuszerodegrees.net/memory/4164.htm Those 3 connectors look like DIN41612 type B 64 way to me, probably so...
by sorchard
Wed Nov 22, 2023 12:18 pm
Forum: Dragon Hardware
Topic: SAM replacement - there!
Replies: 16
Views: 130604

Re: SAM replacement - nearly there

Ah, so this is where all the fun is happening! That's awesome :) I could be wrong but I think the majority of 256K drams had 8 bit refresh. After that the industry moved to CBR refresh and you didn't need a refresh counter any more. I'm curious to know if the logic to recreate the glitching is using...
by sorchard
Thu Oct 12, 2023 1:58 pm
Forum: Uploads
Topic: Colossal Cave Adventure
Replies: 5
Views: 17970

Re: Colossal Cave Adventure

The original definitely required 64K. Browsing the disk contents reveals elements of the Flex OS, which lives in high memory. The third sector appears to contain some map0/map1 switching code. I don't want to look too closely as I would like to play the game properly without spoilers :) Compressing ...
by sorchard
Wed Oct 11, 2023 10:25 am
Forum: Uploads
Topic: Colossal Cave Adventure
Replies: 5
Views: 17970

Colossal Cave Adventure

The attached zip contains three disk image files: - A clean .scp flux image captured from an original disk - An .xml file converted from the .scp file by hxc floppy emulator software - A .dmk file that will run in xroar (type BOOT to run) Edit: Needs a 64K machine to run The original disk is mixed d...
by sorchard
Mon Oct 09, 2023 9:18 am
Forum: Dragon General
Topic: The Dragon Meetup is MOVING! PLEASE READ!
Replies: 8
Views: 25024

Re: The Dragon Meetup is MOVING! PLEASE READ!

A pleasure as always to catch up with everyone, and much gratitude to Tony of course for making this happen :)
by sorchard
Fri Sep 08, 2023 8:26 pm
Forum: Dragon General
Topic: DRAM data retention time
Replies: 20
Views: 44533

Re: DRAM data retention time

bluearcus wrote: Sun May 14, 2023 4:30 pm Dale L. Puckett's KISSable OS9 column published an original banker board OS9 ramdisk drive and source code by William Good
Somewhat bizarrely, (and perhaps way too late!) I've found a disk with that source code on it, among other things.
by sorchard
Tue Sep 05, 2023 2:18 pm
Forum: Uploads
Topic: OS9 User Group Disks
Replies: 2
Views: 12403

OS9 User Group Disks

A nice collection of OS9 User Group news disks to geek out on :ugeek:
by sorchard
Tue May 30, 2023 3:38 pm
Forum: Dragon General
Topic: ASM6809 conditional compiling
Replies: 3
Views: 11078

Re: ASM6809 conditional compiling

Hi Pere, Could you make use of the following batch commands to create a file called 'files.inc' that can be included in the main assembly? echo ; files to include > files.inc for %%f in (*.PTM) do echo include.bin "%%f" >> files.inc asm6809 ... Note the extra spaces between 'echo' and 'include.bin' ...