archive.worldofdragon.org

Wow. Than i'm far away from that.
But ok, i didn't do any optimizing and have many logging action inserted... there is still a lot air

How many CPU cycles does the 6809 at normal running frequency made in one second?

Currently, unoptimized DragonPy runs around 55000 cycles/sec.

The specs say that TST affected NZ and that V set to 0: Set the N (negative) and Z (zero) bits according to the contents of accumulator A or B, and clear the V (overflow) bit. "HNZVC": -aa0- Somewhere i found this: The MC6800 processor clears the C (carry) bit. That's confusing. C should be not affe...

Next test program is with SUBA: https://github.com/jedie/PyDragon32/commit/b61b564cdf2a6ac579f4bdc54ecb760dd718b33a Results: N is set if A between 128 - 255 Z is only set if A == 0 C is set if SUB $00 to $ff V ist set if SUB $80 to $7f H is never set. The spec says it's "undefined". What does it exa...

H set if A == 16,32,48,64,80,96,112,128,144,160,176,192,208,224,240,0 N is set if A between 128 - 255 Z is only set if A == 0 V is only set if A == 128 C is only set on A == 0 (in the 256 iteration where A wrap around: 0xff+1 = 0x0) With this information i have now the first working CC unittest tes...

Sorry for my long line :oops: Thanks for your patience :) It's just that a signed 2's complement 8-bit integer can hold values -128 to +127. If an addition's result exceeds that range, that's an overflow. The sign is a separate issue (and indeed, in 2's complement 0 is considered positive). OK, i th...

I adapted now the XRoar CC routines with: https://github.com/jedie/DragonPy/commi ... 77742423c2
OM ERROR is away. But unuseable anyway
But maybe my python translation it's not enough.

I have made changes. So that a ASCII files has GAPS and 255x 0x55 are yield.
But still get a DS ERROR after the last data block

Log output of PyDC is here: https://gist.github.com/jedie/7100207

I've been taking a look, and you're missing the 0x55 byte at the end of the file, and also, if you load the test file into xroar and csave it to a new cas file, you'll find that the file generated by xroar is contiguous where the one generated by your program has the full 0x55 leads for every block...

Now i make it in this form: 223 T = CC 224 B7$=".":IF T AND 128 THEN B7$="E" 225 B6$=".":IF T AND 64 THEN B6$="F" 226 B5$=".":IF T AND 32 THEN B5$="H" 227 B4$=".":IF T AND 16 THEN B4$="I" 228 B3$=".":IF T AND 8 THEN B3$="N" 229 B2$=".":IF T AND 4 THEN B2$="Z" 230 B1$=".":IF T AND 2 THEN B1$="V" 231 ...