dos33fsprogs/megademo
2018-10-06 15:59:09 -04:00
..
images
apple_40_96.inc
bg_scroll.s megademo: add in mode7 code 2018-10-02 23:04:51 -04:00
bird_mountain.s megademo: add waterfall portion 2018-10-05 23:57:39 -04:00
c64_opener.s
c64_updated.png
c64.png
check_email.s
d_hgr.bmp
deater_hgr.bmp starring: add deater 2018-10-02 00:19:26 -04:00
deater_hgr.png starring: add deater 2018-10-02 00:19:26 -04:00
deater.png starring: add deater 2018-10-02 00:19:26 -04:00
delay_a.s
email_40_96.png
falling_apple.s
FAQ megademo: add FAQ 2018-10-05 16:12:19 -04:00
fireworks.s megademo: initial takeoff code 2018-10-04 00:33:04 -04:00
fs_hgr.bmp
fs_hgr.png
fs.png starring: add deater 2018-10-02 00:19:26 -04:00
fw_background.inc
fw_state_machine.s
fw.s megademo: add in mode7 code 2018-10-02 23:04:51 -04:00
gr_copy.s
gr_fast_clear.s megademo: add in mode7 code 2018-10-02 23:04:51 -04:00
gr_hlin_double.s megademo: add in mode7 code 2018-10-02 23:04:51 -04:00
gr_hline.s
gr_offsets.s
gr_pageflip.s megademo: add in mode7 code 2018-10-02 23:04:51 -04:00
gr_putsprite.s
gr_scroll.s add mode7 code 2018-10-02 23:13:17 -04:00
gr_setpage.s megademo: add in mode7 code 2018-10-02 23:04:51 -04:00
gr_unrolled_copy.s megademo: add waterfall portion 2018-10-05 23:57:39 -04:00
hardware.inc
hgr.s
island_lookup.s megademo: add in mode7 code 2018-10-02 23:04:51 -04:00
island_map.inc megademo: add in mode7 code 2018-10-02 23:04:51 -04:00
KATC.BIN.lz4
lz4_decode.s
Makefile megademo: add waterfall portion 2018-10-05 23:57:39 -04:00
megademo.dsk
megademo.s megademo: more waterfall compaction 2018-10-06 15:43:10 -04:00
mode7_sprites.inc megademo: add in mode7 code 2018-10-02 23:04:51 -04:00
mode7_zp.inc megademo: add in mode7 code 2018-10-02 23:04:51 -04:00
mode7.s add mode7 code 2018-10-02 23:13:17 -04:00
move_letters.s
multiply_fast.s megademo: add in mode7 code 2018-10-02 23:04:51 -04:00
random16.s
README megademo: update README 2018-10-02 00:32:57 -04:00
starring_1.png starring: page flippign works 2018-09-30 23:35:44 -04:00
starring_2.png starring: page flippign works 2018-09-30 23:35:44 -04:00
starring_3_hgr.png starring: page flippign works 2018-09-30 23:35:44 -04:00
starring_3.png
starring_people.s starring: add deater 2018-10-02 00:19:26 -04:00
starring.s starring: page flippign works 2018-09-30 23:35:44 -04:00
starry_sky.scroll megademo: add in mode7 code 2018-10-02 23:04:51 -04:00
takeoff_hgr.png megademo: initial takeoff code 2018-10-04 00:33:04 -04:00
takeoff.png megademo: initial takeoff code 2018-10-04 00:33:04 -04:00
takeoff.s megademo: initial takeoff code 2018-10-04 00:33:04 -04:00
tfv_sprites.inc megademo: add waterfall portion 2018-10-05 23:57:39 -04:00
TODO megademo: initial takeoff code 2018-10-04 00:33:04 -04:00
vapor_lock.s
wait_keypress.s
waterfall_page1.inc megademo: add waterfall portion 2018-10-05 23:57:39 -04:00
waterfall_page2.inc megademo: add waterfall portion 2018-10-05 23:57:39 -04:00
waterfall.s megademo: more size optimization 2018-10-06 15:59:09 -04:00
zp.inc megademo: add in mode7 code 2018-10-02 23:04:51 -04:00


Memory Map:
	$0000-$0100 = ZERO PAGE
	$0100-$0200 = STACK
	$0400-$0800 = TEXT/GR PAGE0
	$0800-$0C00 = TEXT/GR PAGE1
	$0C00-$0fff = we use this as TEXT/GR offscreen buffer
	$1000-$1fff = 4k free
	$2000-$3fFF = HGR1 page	; note we never use HGR2 ($4000-$6000)
	$4000-$9600 = roughly 20k(?)
	$9600-$BFFF = DOS3.3
	$C000-$FFFF = peripherals/ROM

	Largest can load from $4000 to $9600 = 22,016
	Largest can load from $1000 to $9600 = 34,304
	$4000-$C000 = 32768


C64:
Apple II:
Starring:
	Three pages page flipping.  Hires colors subset of Lores so
	can replicate a blocky color image.  Could in theory animate this
	at 60Hz.  Also could flip between 4 pages, but need the 8k of
	HGR page2.

	For cycle-counting timing, jmp one into a bit $C055 instruction
	which is EOR $C0,X (4 cycles)

	Note, discover that the LORES and HIRES pages aren't exact matches
	for each other, even when using same color.  Half-pixel off?

E-mail:
	Half screen text, half 40x96 lores.
	Text is also interlaced top/bottom to create new chars (including
	some lowercase) on Apple II+ and before w/o lower case.
	Trouble as the built-in font is offset a frame on II vs IIe?
	Also annoyance, my GR compressor uses Grey2 (color $a) as encoding,
	which means can't use a GR image to hold plain black spaces (char $a0)