Search found 258 matches

by prime
Tue Jun 22, 2021 11:37 am
Forum: Dragon General
Topic: Comparison of Dragon mass storage options
Replies: 16
Views: 8788

Re: Comparison of Dragon mass storage options

I've uploaded the source for the DragonMMC firmware to my github repository here : https://github.com/prime6809/DragonMMC Phill, when reading the 'Dragon MMC FW Update Instructions v1.1.txt' the only file that I can locate on git is the DGNMMC.BIN for AVR firmware update; but for the other steps; w...
by prime
Tue Jun 08, 2021 4:47 pm
Forum: Discuss This Site
Topic: Dragon Quicks
Replies: 8
Views: 331

Re: Dragon Quicks

Right just to give some feedback on what worked for me.... I have cygwin installed on my Windows machine so in the root of the extracted archive containing all the WAV files : find . -iname "*.wav" -execdir bash /cygdrive/r/temp/DRAGON-WAV-ARC-v100-291116/xr {} \; Then the xr script contained : #!/b...
by prime
Tue Jun 08, 2021 11:44 am
Forum: Discuss This Site
Topic: Dragon Quicks
Replies: 8
Views: 331

Re: Dragon Quicks

Cheers all that seems to be helpfull.

I have found that adding -timeout 30 is handy for games like "Screaming Abdabs" that don't turn off the tape once they finish loading!

Cheers.

Phill.
by prime
Tue Jun 08, 2021 10:16 am
Forum: Dragon General
Topic: xroar rompath
Replies: 1
Views: 192

xroar rompath

Hi all, I'm having problems getting the rompath command line parameter to work.... I have the windows version of xroar (and thge roms) installled in : G:\Emulate\xroar\xroar-0.36.2-w64 If I change to that directory and run xroar (either from windows explorer, or from a cmd window), everything works ...
by prime
Mon Jun 07, 2021 11:28 pm
Forum: Discuss This Site
Topic: Dragon Quicks
Replies: 8
Views: 331

Dragon Quicks

Hi all,

Is there a version of the Dragon quickstart archive that contains the same content as the Android phone / wav archive but in *CAS* format. This would be idela for DragonMMC as it can fastload CAS files.

Failing that is there an automated way to convert WAV->CAS?

Cheers.

Phill.
by prime
Sun May 30, 2021 10:55 pm
Forum: Dragon Hardware
Topic: Dragon expansions - FF00 page ports
Replies: 8
Views: 448

Re: Dragon expansions - FF00 page ports

DragonMMC used locations All in $FF50-$FF5F $FF50 D_CMD_REG Command / Result $FF51 D_LATCH_REG Latch (single byte parameters). $FF52 D_READ_DATA_REG Read data $FF53 D_WRITE_DATA_REG Write data $FF54 D_STATUS_REG AVR status $FF55 D_PIA_MAP PIA redirect (write only) $FF56 D_RAM_CTRL RAM / ROM control ...
by prime
Tue May 18, 2021 11:00 pm
Forum: Dragon Hardware
Topic: Dragon to CoCo
Replies: 10
Views: 947

Re: Dragon to CoCo

To clarify on DragonMMC : On the Dragon (or DraCo in Dragon mode). Load Dragon basic file however you want to load it (From real tape, cas file, disk file etc). Convert from Dragon to CoCo Tokens : MRETOKC Save the converted basic program direct to the SD card : MSAVE"filename" The move the DragonMM...
by prime
Sun May 09, 2021 9:32 pm
Forum: Dragon General
Topic: DRAM data retention time
Replies: 18
Views: 2223

Re: DRAM data retention time

I keep wondering about using SRAM for a memory upgrade after all 512K RAMs can be had pretty cheap nowadays, and you don't have the problem with refresh. However you would have to demux the Z0..Z7 lines from the SAM, and cope with the fact that the Dragon & CoCo designs rely on the fact that general...
by prime
Fri Jan 29, 2021 10:22 am
Forum: Dragon General
Topic: OS9
Replies: 0
Views: 1632

OS9

Hi all, Was the disk with the modules that would allow a custom OS-9 install ever released? What I'm looking to do is build a custom OS-9 boot disk with some updated / changed modules (specifically disk and clock). Yes I know about Nitros9, but I'd also like to backport my work to "official" Dragon ...
by prime
Sat Dec 19, 2020 10:50 am
Forum: Dragon Hardware
Topic: Dragon Beta
Replies: 7
Views: 2668

Re: Dragon Beta

Are both CPU's really running code from the ROM at the same time? Wouldn't that cause conflicts on the data bus? Is CPU#1 ever HALTed? The current code has a comment saying FIRQ goes to both processors, confirmed by your notes, but the old working emulation never seemed to do this. I'll see if I ca...