ca5db83e8f
rethought the rounding function
...
realized the top bits are not enough, that was a brainfart
doing comparisons now
2023-01-28 16:37:37 -08:00
b55015ff87
no this seems right
...
but it's still coming out different. wtf am i doing wrong
it's gotta be a brainfart
2023-01-28 14:34:52 -08:00
76715a6151
Adjust rounding, loop exits
...
Still slight differences between positive and negative Y halves
Not sure what's wrong
2023-01-28 13:34:50 -08:00
b6ddc0d50e
update readme & doc comments & vars
2023-01-22 14:34:30 -08:00
7009e16235
fix range checks
2023-01-22 13:56:19 -08:00
0afed893a6
whoops
...
now produces correct fractal but iterations outside are
sometimes wrong
probably range errrs in intermediate calc
2023-01-22 12:57:52 -08:00
8af3721308
tweaks
2023-01-22 12:47:24 -08:00
57975b7158
not sure what's wrong have to hceck over
2023-01-22 12:02:15 -08:00
1bef004ccd
precision cleanup
...
using 4.12 and 8.24 consistently
2023-01-22 11:17:51 -08:00
ae9dd0674d
corrupt! but it produces pixels
2023-01-22 10:42:37 -08:00
b4721ae46b
fix pixel shift
2023-01-22 09:37:37 -08:00
dbbec8ed6d
ok two things wrong:
...
1) bit masks are backwards
2) iter always returning 0
2023-01-22 09:34:42 -08:00
d36667938d
run it (fails)
2023-01-22 09:13:19 -08:00
efac8f4f62
now writes pixels sorta
2023-01-22 09:09:12 -08:00
a8872b4e66
hmm
2023-01-22 08:34:06 -08:00
2e5f91a0db
wip gfx
2023-01-22 08:20:59 -08:00
335c4d2c96
and use display list copy in aligned memory
2023-01-22 07:36:08 -08:00
6fc07b9e65
hmm
2023-01-22 07:23:46 -08:00
9cbcf1cb5a
strings fixed but .... something's corrupt in display
2023-01-22 06:35:41 -08:00
0c04e7ddc8
text but it fails cause not ascii lol
2023-01-22 06:12:40 -08:00
7cb879d110
fix graphics set
...
forgot that the OS copies shadow registers over lol
2023-01-22 05:54:50 -08:00
f22653bd87
wip loop
2023-01-21 19:17:30 -08:00
8044dbfc21
whee
2023-01-07 22:57:18 -08:00
a47836a39a
mwahahah
2023-01-07 22:02:26 -08:00
c5a62cfa1d
wip
2023-01-07 21:19:40 -08:00
c3c5968749
experimenting with fixed-point log lookup table
...
probably won't be enough precision to work with
at a size that fits in memory :D
2023-01-07 20:32:59 -08:00
f1adffd175
asdlijf
2023-01-07 20:11:52 -08:00
a34687ba25
hmm
2023-01-07 20:06:12 -08:00
38005a6f7d
hmm
2023-01-07 19:36:11 -08:00
badc730f2b
definitely too long :D
2023-01-07 18:37:55 -08:00
fe23193ce9
woot this one works but is too huge
2023-01-07 18:33:06 -08:00
7da3993bfd
wip
2023-01-07 18:30:32 -08:00
a6c49a2ef9
oh ho
2023-01-07 17:52:14 -08:00
d32b630320
woo
2023-01-07 17:37:41 -08:00
49831dc048
wip logs
2023-01-07 17:20:18 -08:00
b36ab77e97
update readme
2023-01-06 17:28:35 -08:00
32bd5a540c
flesh out the mandelbrot iteration loop
...
some bits i missed increased total to:
1939 - 3007 cycles per iteration
probably still buggy, will test later :D
2023-01-06 17:18:13 -08:00
3d94a9b5d4
show range
2023-01-05 11:58:32 -08:00
c7e7129eb2
whoops missed a few cycs
2023-01-05 11:55:41 -08:00
2340f8210e
update round & sketch out the iter cycle count
2023-01-05 11:36:42 -08:00
7f70f14fc2
one last round sketch
...
combining copy and round
2023-01-05 11:17:13 -08:00
7ac0df0343
Added two version of 16-bit rounding
...
round16_incdec uses inc and dec
round16_addsub uses adc and sbc
the incdec version is the same when no rounding is needed
but saves about 8 cycles on the rounding cases, for an
average savings of 4.5 cycles for randomly distributed inputs
untested so far
2023-01-05 09:06:07 -08:00
6edd2f71d9
whoops added wrong
2023-01-04 21:26:47 -08:00
373e1441d3
comment tweaks
2023-01-04 21:09:45 -08:00
3a0545b673
tyop
2023-01-04 21:04:53 -08:00
1408855eed
Note how many cycles loop unrolling saves
...
+4 cycles one-time setup
ldx #8 ; 2 cyc for first 8
ldx #8 ; 2 cyc for second 8 (different shift behavior)
-5 cycles/iter to get bit now
lsr arg + 1 ; 5 cyc
rol arg ; 5 cyc
+10 cycles/iter to get the bit in a loop
dex ; 2 cyc
bne ; 2 cyc
4 cycles/iter for the loop
4 + (14 * 16) = 4 + 224 = 228
2023-01-04 21:02:18 -08:00
519f8ad635
whoops
2023-01-04 20:57:07 -08:00
efd722eeb2
update cycle count for imul16
2023-01-04 20:37:16 -08:00
41915cf122
save a few bytes by removing a dupe tail from two cases now
2023-01-04 20:33:42 -08:00
38091e535f
hmm
2023-01-04 20:31:39 -08:00
