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btw. your compiled version of v09 doesn't work for me. It doesn't display Welcome to BUGGY 1.0 :( There no guarantee that a binary works for one's environment. Take a look with file and ldd what this binary is for. On the git source repository I wouldn't enclose any binaries. This was just (maybe b...

"moved" from http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=5&t=4308&p=11266#p11266 : [..] Great to hear, someone else is also interested in this;) I extracted https://github.com/jedie/DragonPy/tree/master/sbc09/sbc09 and move it into a separate repository: https://github.com/jedie/sbc09 T...

I found http://lennartb.home.xs4all.nl/m6809.html there is a archive to download with GPL sources: http://lennartb.home.xs4all.nl/sbc09.tar.gz Very interesting stuff! [..] The Achive contains (C code) e.g.: * 6809 assembler: https://github.com/jedie/DragonPy/blob/master/sbc09/sbc09/a09.c * 6809 sim...

zephyr wrote:[..]
Your mods have introduced a bug to the code. Try entering 65522 or higher as your start address.

Damn, you are right. Should be corrected by Not a good idea to manipulate the counter variable (at least in this case)

I'm obsessive too. :) The SGN() function is great and seems to be optimal for this task, couldn't find anything better. :) The efficiency of SGN() deserves some additional common basic optimizations ... 10 cls 15 bm=65536 20 line input"start address (dec) >";m$ 30 l=len(m$):if l<1 or l>5 then 10 40 ...

A other question to the stacks... What is if PULL more often called than PUSH before? Just return the values "outside" the stack? Just another thought on this: compare PULS X with LDX ,S++ They are nearly equal, except for condition code handling and PULS X saves 1 cycle (2 cycles in case register ...

I didn't found a better reference. So i merge the information i have, with this script: https://github.com/jedie/DragonPy/blob/master/MC6809data/MC6809_data2.py The result is this: https://github.com/jedie/DragonPy/blob/master/MC6809data/MC6809_data_raw2.py [..] As far as I understand LEA, if a mem...

[..] You can see: LDA #-128 and SUBA #1 results in accu A == $7f == signed: 127 == unsigned: 127 Flags set to: N= 0 Z= 0 V= 1 C= 0 Second one LDA #+127 and ADDA #1 results in accu A == $80 == signed: -128 == unsigned: 128 Flags set to: N= 1 Z= 0 V= 1 C= 0 Is that right? Seems right so far. Have you...

[..] My Python interpretation is this: def set_Z8(self, r): self.Z = 1 if r & 0xff == 0 else 0 def set_N8(self, r): self.N = 1 if signed8(r) < 0 else 0 def update_NZ8(self, r): self.set_N8(r) self.set_Z8(r) Why not simply def set_N8(self, r): self.N = 1 if r & 0x80 else 0 ? [..] I must collect some...

It seems that it is possible, read: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=41&t=34143 Very interesting, but to summary up (if I got it right): The authors version supports only FM (single density) so far (someone other intends to add MFM support), there are only some pictures, no schemat...