A place to discuss everything Dragon related that doesn't fall into the other categories.
sixxie
Posts: 1348 Joined: Fri Jul 18, 2008 8:36 amLocation: Hertfordshire
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by sixxie Mon Sep 30, 2013 2:55 pm
jedie wrote: Can you post the dissembled ROM code somewhere?
It wouldn't be terribly useful - I've not gone through and isolated data areas for it, so a lot of it makes no sense at all. Just enough to see that the latter is almost certainly a patch of the former, not a complete reassemble.
And you could get the same results with "6809dasm.pl org=0xc000 d200e_2.rom"
FWIW comparing hexdumps shows a lot of the differences to be simple bit flips - usually in bit 6 (0x40).
zephyr
Posts: 1474 Joined: Mon Jul 21, 2008 1:18 am
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by zephyr Mon Sep 30, 2013 3:19 pm
Here is a list of the differences.
Comparing files d64rom2.rom and D200E_ROM2.ROM
zephyr
Posts: 1474 Joined: Mon Jul 21, 2008 1:18 am
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by zephyr Mon Sep 30, 2013 4:08 pm
The 64K mode bootstrap routine ($BF49 - $BFE8) is identical to the Dragon 64.
zephyr
Posts: 1474 Joined: Mon Jul 21, 2008 1:18 am
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by zephyr Mon Sep 30, 2013 8:26 pm
robcfg wrote: If it works right on the machine, I'll redump the rom.
Does 64K mode BASIC work OK on the real D200E?
robcfg
Posts: 1530 Joined: Sat Apr 04, 2009 10:16 pmLocation: Stockholm, Sweden
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by robcfg Mon Sep 30, 2013 8:52 pm
Yes, and I managed to do a Ninja dump by saving the basic area from basic itself and adding the las bytes from serveral redumps I made with the programmer.
zephyr
Posts: 1474 Joined: Mon Jul 21, 2008 1:18 am
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by zephyr Mon Sep 30, 2013 9:01 pm
Thanks!
sixxie
Posts: 1348 Joined: Fri Jul 18, 2008 8:36 amLocation: Hertfordshire
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by sixxie Mon Sep 30, 2013 9:43 pm
OKEY!
zephyr
Posts: 1474 Joined: Mon Jul 21, 2008 1:18 am
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by zephyr Mon Sep 30, 2013 11:17 pm
The @ key is Shifted (Shift+Clear) on thE D200E. How do you pause (Shift+@) a BASIC program listing with this machine?
Alastair
Posts: 669 Joined: Fri Jul 18, 2008 11:33 pm
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by Alastair Mon Sep 30, 2013 11:58 pm
robcfg wrote: It's possible that the 200E PCB scans appear black, that is because of an issue with the thumbnail renderer.
I have not tested this but could this be due to the images being progressive jpegs?
sixxie
Posts: 1348 Joined: Fri Jul 18, 2008 8:36 amLocation: Hertfordshire
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by sixxie Tue Oct 01, 2013 7:44 am
zephyr wrote: The @ key is Shifted (Shift+Clear) on thE D200E. How do you pause (Shift+@) a BASIC program listing with this machine?
Poking around at random reveals Shift+Space.
