mirror of
https://github.com/deater/dos33fsprogs.git
synced 2025-01-01 05:31:52 +00:00
Merge branch 'master' of github.com:deater/dos33fsprogs
This commit is contained in:
Vince Weaver
commit
99c3070717
52
disk/prorwts/Makefile
Normal file
52
disk/prorwts/Makefile
Normal file
@ -0,0 +1,52 @@
|
||||
include ../../Makefile.inc
|
||||
|
||||
EMPTY_DISK = ../../empty_disk/
|
||||
LINKER_SCRIPTS = ../../linker_scripts/
|
||||
CADIUS = ~/research/apple2/cadius/bin/release/cadius
|
||||
PRODOSDIR = ../../utils/prodos-utils/
|
||||
PRODOS = ../../utils/prodos-utils/prodos
|
||||
|
||||
all: prorwts_test.2mg
|
||||
|
||||
# Note: cadius, put #XXYYYY after filename for type/value
|
||||
|
||||
#prorwts_test.po: disk01_files/LEVEL_ARRIVAL prorwts_ca65.o
|
||||
# $(PRODOSDIR)/mkprodosfs prorwts_test.po -n Test
|
||||
|
||||
prorwts_ca65.o: prorwts_ca65.s
|
||||
ca65 -o prorwts_ca65.o prorwts_ca65.s -l prorwts_ca65.lst
|
||||
|
||||
###
|
||||
|
||||
prorwts_test.2mg: \
|
||||
PROBOOTHD SEASONS
|
||||
$(CADIUS) CREATEVOLUME prorwts_test.2mg Test 32MB
|
||||
dd conv=notrunc if=PROBOOTHD of=prorwts_test.2mg bs=1 count=512 oseek=64
|
||||
# $(CADIUS) CREATEFOLDER prorwts_test.2mg /Test/DISK01
|
||||
# $(CADIUS) CREATEFOLDER prorwts_test.2mg /Test/DISK39
|
||||
# $(CADIUS) CREATEFOLDER prorwts_test.2mg /Test/DISK40
|
||||
# $(CADIUS) CREATEFOLDER prorwts_test.2mg /Test/DISK41
|
||||
# $(CADIUS) CREATEFOLDER prorwts_test.2mg /Test/DISK43
|
||||
$(CADIUS) ADDFILE prorwts_test.2mg /Test/ SEASONS#061000
|
||||
|
||||
|
||||
###
|
||||
PROBOOTHD: proboothd.o
|
||||
ld65 -o PROBOOTHD proboothd.o -C $(LINKER_SCRIPTS)/apple2_800.inc
|
||||
|
||||
proboothd.o: proboothd.s
|
||||
ca65 -o proboothd.o proboothd.s -l proboothd.lst
|
||||
|
||||
####
|
||||
|
||||
SEASONS: seasons.o
|
||||
ld65 -o SEASONS seasons.o -C ../../linker_scripts/apple2_1000.inc
|
||||
|
||||
seasons.o: seasons.s
|
||||
ca65 -o seasons.o seasons.s -l seasons.lst
|
||||
|
||||
|
||||
####
|
||||
|
||||
clean:
|
||||
rm -f *~ *.o *.lst PROBOOTHD SEASONS
|
||||
10
disk/prorwts/README
Normal file
10
disk/prorwts/README
Normal file
@ -0,0 +1,10 @@
|
||||
|
||||
some test code for using large 32MB prodos hard-drive images
|
||||
|
||||
this is based on the prorwts code by qkumba, and also the
|
||||
4cade/total-replay code by 4am and qkumba
|
||||
|
||||
currently code here only work on hd image, and unlike 4cade
|
||||
won't work as double-clicking a disk image on a IIgs as that's not
|
||||
really a use case I would ever do
|
||||
|
||||
99
disk/prorwts/hardware.inc
Normal file
99
disk/prorwts/hardware.inc
Normal file
@ -0,0 +1,99 @@
|
||||
;; HARDWARE LOCATIONS
|
||||
|
||||
KEYPRESS = $C000
|
||||
KEYRESET = $C010
|
||||
|
||||
;; SOFT SWITCHES
|
||||
CLR80COL = $C000 ; (w) PAGE1/PAGE2 normal
|
||||
SET80COL = $C001 ; (w) PAGE1/PAGE2 switches PAGE1 in Aux instead
|
||||
READMAINMEM = $C002 ; (w) to read from main mem ($0200..$BFFF)
|
||||
READAUXMEM = $C003 ; (w) to read from aux mem ($0200..$BFFF)
|
||||
WRITEMAINMEM = $C004 ; (w) to write to main mem ($0200..$BFFF)
|
||||
WRITEAUXMEM = $C005 ; (w)to write to aux mem ($0200..$BFFF)
|
||||
SETSTDZP = $C008 ; (w) to use main mem stack/zp ($00FF-$01FF)
|
||||
EIGHTYCOLOFF = $C00C ; (w) use 40 cols / exit DHGR
|
||||
EIGHTYCOLON = $C00D
|
||||
PRIMARYCHARSET = $C00E ; (w) to disable mousetext
|
||||
TBCOLOR = $C022 ; IIgs text foreground / background colors
|
||||
NEWVIDEO = $C029 ; IIgs graphics modes
|
||||
SPEAKER = $C030
|
||||
CLOCKCTL = $C034 ; bits 0-3 are IIgs border color
|
||||
CYAREG = $C036 ; iigs motor detect and clock speed
|
||||
SET_GR = $C050
|
||||
SET_TEXT = $C051
|
||||
FULLGR = $C052
|
||||
TEXTGR = $C053
|
||||
PAGE1 = $C054
|
||||
PAGE2 = $C055
|
||||
LORES = $C056 ; Enable LORES graphics
|
||||
HIRES = $C057 ; Enable HIRES graphics
|
||||
AN3 = $C05E ; Annunciator 3
|
||||
|
||||
PADDLE_BUTTON0 = $C061
|
||||
PADDL0 = $C064
|
||||
PTRIG = $C070
|
||||
|
||||
; $C081 for setting language card
|
||||
; $C082 for setting READ_ROM_NOWRITE
|
||||
|
||||
|
||||
|
||||
|
||||
;; MONITOR ROUTINES
|
||||
|
||||
HLINE = $F819 ; HLINE Y,$2C at A
|
||||
VLINE = $F828 ; VLINE A,$2D at Y
|
||||
CLRSCR = $F832 ; Clear low-res screen
|
||||
CLRTOP = $F836 ; clear only top of low-res screen
|
||||
SETCOL = $F864 ; COLOR=A
|
||||
ROM_TEXT2COPY = $F962 ; iigs
|
||||
INIT_TEXT = $FB2F ; set lo-res/page1 and call text
|
||||
TEXT = $FB36
|
||||
GR = $FB40
|
||||
TABV = $FB5B ; VTAB to A
|
||||
ROM_MACHINEID = $FBB3 ; iigs
|
||||
BELL = $FBDD ; ring the bell
|
||||
BASCALC = $FBC1 ;
|
||||
VTAB = $FC22 ; VTAB to CV
|
||||
HOME = $FC58 ; Clear the text screen
|
||||
WAIT = $FCA8 ; delay 1/2(26+27A+5A^2) us
|
||||
CROUT1 = $FD8B
|
||||
SETINV = $FE80 ; INVERSE
|
||||
SETNORM = $FE84 ; NORMAL
|
||||
COUT = $FDED ; output A to screen
|
||||
COUT1 = $FDF0 ; output A to screen
|
||||
SETKBD = $FE89 ; set input to keyboard
|
||||
SETVID = $FE93 ; set output to video screen
|
||||
|
||||
COLOR_BLACK = 0
|
||||
COLOR_RED = 1
|
||||
COLOR_DARKBLUE = 2
|
||||
COLOR_PURPLE = 3
|
||||
COLOR_DARKGREEN = 4
|
||||
COLOR_GREY = 5
|
||||
COLOR_MEDIUMBLUE = 6
|
||||
COLOR_LIGHTBLUE = 7
|
||||
COLOR_BROWN = 8
|
||||
COLOR_ORANGE = 9
|
||||
COLOR_GREY2 = 10
|
||||
COLOR_PINK = 11
|
||||
COLOR_LIGHTGREEN = 12
|
||||
COLOR_YELLOW = 13
|
||||
COLOR_AQUA = 14
|
||||
COLOR_WHITE = 15
|
||||
|
||||
COLOR_BOTH_BLACK = $00
|
||||
COLOR_BOTH_RED = $11
|
||||
COLOR_BOTH_DARKBLUE = $22
|
||||
COLOR_BOTH_DARKGREEN = $44
|
||||
COLOR_BOTH_GREY = $55
|
||||
COLOR_BOTH_MEDIUMBLUE = $66
|
||||
COLOR_BOTH_LIGHTBLUE = $77
|
||||
COLOR_BOTH_BROWN = $88
|
||||
COLOR_BOTH_ORANGE = $99
|
||||
COLOR_BOTH_PINK = $BB
|
||||
COLOR_BOTH_LIGHTGREEN = $CC
|
||||
COLOR_BOTH_YELLOW = $DD
|
||||
COLOR_BOTH_AQUA = $EE
|
||||
COLOR_BOTH_WHITE = $FF
|
||||
|
||||
267
disk/prorwts/proboothd.s
Normal file
267
disk/prorwts/proboothd.s
Normal file
@ -0,0 +1,267 @@
|
||||
;license:BSD-3-Clause
|
||||
|
||||
; based on minimal open/read binary file in ProDOS filesystem
|
||||
; from 4cade
|
||||
;
|
||||
;copyright (c) Peter Ferrie 2016-2019
|
||||
|
||||
.include "hardware.inc"
|
||||
|
||||
PROBOOTENTRY = $2000
|
||||
|
||||
; zpage usage, arbitrary selection except for the "ProDOS constant" ones
|
||||
command = $42 ; ProDOS constant
|
||||
UNIT = $43 ; ProDOS constant
|
||||
ADRLO = $44 ; ProDOS constant
|
||||
ADRHI = $45 ; ProDOS constant
|
||||
BLOKLO = $46 ; ProDOS constant
|
||||
BLOKHI = $47 ; ProDOS constant
|
||||
|
||||
A2L = $3e
|
||||
A2H = $3f
|
||||
sizehi = $53
|
||||
|
||||
|
||||
SCRN2P2 = $f87b ; shifts top nibble to bottom
|
||||
|
||||
dirbuf = $1e00 ;for size-optimisation
|
||||
|
||||
; start of boot sector, presumably how many sectors to load
|
||||
; 512 bytes on prodos/hard-disk(???)
|
||||
|
||||
.byte 1
|
||||
|
||||
proboot_start:
|
||||
txa
|
||||
pha ; save slot for later
|
||||
|
||||
; init. is all this necessary?
|
||||
; originally "4cade.init.machine.a"
|
||||
|
||||
cld ; clear direction flag
|
||||
sta $C082 ; read rom / no write (language card)
|
||||
sta PRIMARYCHARSET ; turn off mouse text
|
||||
sta EIGHTYCOLOFF ; disable 80-col mode
|
||||
sta CLR80COL
|
||||
sta READMAINMEM ; make sure not using aux mem
|
||||
sta WRITEMAINMEM
|
||||
sta SETSTDZP
|
||||
|
||||
; more init
|
||||
; originally "4cade.init.screen.a"
|
||||
|
||||
; initializes and clears screen using ROM routines
|
||||
|
||||
jsr INIT_TEXT ; setup text mode
|
||||
jsr HOME ; clear screen
|
||||
jsr SETNORM ; normal text
|
||||
jsr SETKBD ; keyboard input
|
||||
jsr SETVID ; video output
|
||||
|
||||
; set up disk stuff?
|
||||
|
||||
pla ; restore slot
|
||||
sta UNIT ; save for later
|
||||
|
||||
tax
|
||||
; X = boot slot x16
|
||||
|
||||
; Y = 0
|
||||
; 4cade calls a print-title routine here that exits with Y=0
|
||||
|
||||
ldy #0
|
||||
|
||||
; set up ProDOS shim
|
||||
|
||||
; from IIgs smartport firmware manual
|
||||
|
||||
; prodos entry point is $CX00+($CXFF)
|
||||
; so if slot 7, $C700 + value in $C7ff (say, A) so $C70A
|
||||
; smartport entry point is $CX00+(CXFF)+3
|
||||
|
||||
|
||||
setup_loop:
|
||||
txa
|
||||
jsr SCRN2P2 ; shift top nibble of A to bottom
|
||||
and #7
|
||||
ora #$c0
|
||||
sta $be30, Y ; ????
|
||||
sta slot_smc+2
|
||||
sta entry_smc+2 ; set up smartport/prodos entry point
|
||||
|
||||
slot_smc:
|
||||
lda $cfff
|
||||
sta entry_smc+1 ; set up rest of smartport/prodos entry
|
||||
|
||||
lda fakeMLI_e-$100, Y
|
||||
sta $be00+fakeMLI_e-fakeMLI, Y
|
||||
iny
|
||||
bne setup_loop ; ?????
|
||||
|
||||
; Y is 0 here
|
||||
; ldy #0
|
||||
sty ADRLO
|
||||
stx $bf30 ; ?????
|
||||
sty $200 ; ?????
|
||||
|
||||
opendir:
|
||||
; read volume directory key block
|
||||
ldx #2
|
||||
|
||||
; include volume directory header in count
|
||||
|
||||
firstent:
|
||||
lda #>dirbuf ; load volume block to ADDRH/L (dirbuf/$1e00)
|
||||
sta ADRHI
|
||||
sta A2H
|
||||
jsr seekread
|
||||
|
||||
|
||||
lda #4 ; start at filename offset
|
||||
sta A2L
|
||||
nextent:
|
||||
ldy #0
|
||||
|
||||
; match name lengths before attempting to match names
|
||||
; first byte, bottom nibble is length
|
||||
|
||||
lda (A2L), Y
|
||||
and #$0f
|
||||
tax
|
||||
inx
|
||||
|
||||
try_again:
|
||||
cmp filename, Y
|
||||
beq filename_char_match
|
||||
|
||||
; move to next directory in this block
|
||||
not_found:
|
||||
clc
|
||||
lda A2L
|
||||
adc #$27
|
||||
sta A2L
|
||||
bcc no_cross_page
|
||||
|
||||
; there can be only one page crossed,
|
||||
; so we can increment instead of adc
|
||||
|
||||
inc A2H
|
||||
no_cross_page:
|
||||
cmp #$ff ; 4+($27*$0d)
|
||||
bne nextent
|
||||
|
||||
; read next directory block when we reach the end of this block
|
||||
|
||||
ldx dirbuf+2
|
||||
ldy dirbuf+3
|
||||
bcs firstent
|
||||
|
||||
filename_char_match:
|
||||
iny ; point to next char
|
||||
lda (A2L), Y ; grab value
|
||||
dex ; countdown filename length
|
||||
bne try_again ; if not full match, keep going
|
||||
|
||||
|
||||
stx $ff ; set address $FF in zero page to zero?
|
||||
|
||||
; bytes $11 and $12 in the file entry are the "key pointer"
|
||||
|
||||
ldy #$11
|
||||
lda (A2L), Y
|
||||
tax
|
||||
iny
|
||||
lda (A2L), Y
|
||||
tay
|
||||
|
||||
|
||||
; seedling files = less than 512 bytes, contents are simply key block
|
||||
; storage type is $1
|
||||
; sapling files = 512B - 128k
|
||||
; key block has low bytes of addrss in 0..255 and high in 256..512
|
||||
; storage type is $2
|
||||
; tree files = 128k - 16M
|
||||
|
||||
|
||||
; read the 512-byte block at key pointer into memory
|
||||
; will only work for a "sapling" file?
|
||||
|
||||
readfile:
|
||||
jsr seekread
|
||||
|
||||
inc ADRHI ; point destination past it (so at $2000)
|
||||
inc ADRHI
|
||||
|
||||
; fetch contents of file?
|
||||
; just keep reading 512-byte blocks until done?
|
||||
; this means file will be at $2000?
|
||||
|
||||
blockind:
|
||||
ldy $ff ; use $ff as block index?
|
||||
inc $ff ;
|
||||
|
||||
ldx dirbuf, Y ; low byte of block#
|
||||
lda dirbuf+256, Y ; high byte of block#
|
||||
tay
|
||||
|
||||
bne readfile ; if high byte!=0, read another block
|
||||
|
||||
txa ; if high byte=0 and low_byte=0, done
|
||||
bne readfile
|
||||
|
||||
readdone:
|
||||
jmp PROBOOTENTRY ; would be $2000 if sapling
|
||||
|
||||
;================================
|
||||
; seek read
|
||||
;================================
|
||||
; Y:X = block number to load (???)
|
||||
; A = page to load to?
|
||||
|
||||
seekread:
|
||||
stx BLOKLO
|
||||
sty BLOKHI
|
||||
lda #1
|
||||
sta command
|
||||
lda ADRHI
|
||||
pha
|
||||
entry_smc:
|
||||
jsr $d1d1
|
||||
pla
|
||||
sta ADRHI
|
||||
rts
|
||||
|
||||
fakeMLI:
|
||||
bne retcall
|
||||
readblk:
|
||||
dey
|
||||
dey
|
||||
sty ADRHI
|
||||
tay
|
||||
jsr $bf00+seekread-fakeMLI
|
||||
retcall:
|
||||
pla
|
||||
tax
|
||||
inx
|
||||
inx
|
||||
inx
|
||||
txa
|
||||
pha
|
||||
;-:
|
||||
rts
|
||||
fakeMLI_e:
|
||||
|
||||
|
||||
filename:
|
||||
; expects PASCAL-string filename
|
||||
; first byte size (max 15)
|
||||
.byte 7,"SEASONS"
|
||||
|
||||
;.if (* > $9f7)
|
||||
; .error "Bootloader is too large"
|
||||
;.endif
|
||||
|
||||
;*=$9f8
|
||||
;!byte $D3,$C1,$CE,$A0,$C9,$CE,$C3,$AE
|
||||
; S A N I N C .
|
||||
;
|
||||
1553
disk/prorwts/prorwts_ca65.s
Normal file
1553
disk/prorwts/prorwts_ca65.s
Normal file
File diff suppressed because it is too large
Load Diff
269
disk/prorwts/seasons.s
Normal file
269
disk/prorwts/seasons.s
Normal file
@ -0,0 +1,269 @@
|
||||
; Apple II Seasons -=DESiRE=- 128B Demo for Outline 2020
|
||||
; based on the code in Hellmood's 64B x86 demo "Autumn"
|
||||
; by deater (Vince Weaver) <vince@deater.net>
|
||||
|
||||
; DOS version is 64 bytes
|
||||
; original Apple II 6502 port was 167 bytes
|
||||
; I got it down to 126 bytes
|
||||
; qkumba got it down to 116
|
||||
; color-cycling brought it back up to 127 bytes
|
||||
|
||||
; To save space, runs from the zero page starting at $50
|
||||
; need to avoid $E0-$E5 used by the hgr/hplot routines
|
||||
|
||||
; Zero Page Addresses
|
||||
|
||||
XCOORDL = $F3
|
||||
XCOORDH = $F4
|
||||
YCOORDL = $F5
|
||||
YCOORDH = $F6
|
||||
EBP1 = $F7
|
||||
EBP2 = $F8
|
||||
EBP3 = $F9
|
||||
EBP4 = $FA
|
||||
COLORL = $FB
|
||||
COLORH = $FC
|
||||
SOUND = $FD
|
||||
FRAMEL = $FE
|
||||
FRAMEH = $FF
|
||||
|
||||
; Soft Switches
|
||||
KEYPRESS= $C000
|
||||
KEYRESET= $C010
|
||||
SPEAKER = $C030
|
||||
|
||||
; ROM routines
|
||||
; Some of these are in the Applesoft ROMs so need at least an Apple II+
|
||||
; or later to run
|
||||
|
||||
TEXT = $FB36 ; Set text mode
|
||||
HGR2 = $F3D8 ; Set full-screen hi-res mode using page 2 ($4000)
|
||||
; 280x192 6-colors
|
||||
HPLOT0 = $F457 ; Plot point, (Y,X) = Horizontal, (A=Vertical)
|
||||
HCOLOR = $F6EC ; Set color in X, must be 0..7
|
||||
|
||||
; use zero-page addressing to save space
|
||||
;.zeropage
|
||||
|
||||
seasons:
|
||||
|
||||
;===================
|
||||
; init screen ; Instruction Length
|
||||
jsr HGR2 ; 3
|
||||
|
||||
; init vars to zero. Apple II doesn't clear RAM
|
||||
; some of these might be necessary?
|
||||
; should we make this a loop?
|
||||
|
||||
; ldx #0 ; 2
|
||||
; stx XCOORDL ; 2
|
||||
; stx YCOORDL ; 2
|
||||
; stx XCOORDH ; 2
|
||||
; stx YCOORDH ; 2
|
||||
; stx EBP1 ; 2
|
||||
; stx EBP2 ; 2
|
||||
; stx EBP3 ; 2
|
||||
; stx EBP4 ; 2
|
||||
; stx COLORH ; 2
|
||||
|
||||
|
||||
seasons_forever:
|
||||
|
||||
; save old Xcoord value to X/Y for later
|
||||
; push/pop is 1 byte each but have to get
|
||||
; value into accumulator first
|
||||
ldx XCOORDL ; 2
|
||||
ldy XCOORDH ; 2
|
||||
|
||||
; 16-bit subtraction x=x-y
|
||||
; need to set carry before subtraction on 6502
|
||||
txa ; 1 (xcoordl in X)
|
||||
sec ; 1
|
||||
sbc YCOORDL ; 2
|
||||
sta XCOORDL ; 2
|
||||
tya ; 1 (xcoordh in Y)
|
||||
sbc YCOORDH ; 2
|
||||
|
||||
; 16-bit arithmatic shift right of X
|
||||
; 6502 has no asr instruction
|
||||
; cmp #$80 sets carry if high bit set
|
||||
cmp #$80 ; 2 ; XCOORDH still in A from before
|
||||
ror ; 1
|
||||
sta XCOORDH ; 2
|
||||
ror XCOORDL ; 2
|
||||
|
||||
; 16-bit add, ycoord=ycoord+oldx
|
||||
clc ; 1
|
||||
txa ; 1
|
||||
adc YCOORDL ; 2
|
||||
sta YCOORDL ; 2
|
||||
tya ; 1
|
||||
adc YCOORDH ; 2
|
||||
|
||||
; 16-bit arithmatic shift right of y-coord
|
||||
cmp #$80 ; 2 ; YCOORDH still in A from before
|
||||
ror ; 1
|
||||
sta YCOORDH ; 2
|
||||
ror YCOORDL ; 2
|
||||
|
||||
; 32 bit rotate of low bit shifted out of Y-coordinate
|
||||
ror EBP1 ; 2
|
||||
ror EBP2 ; 2
|
||||
ror EBP3 ; 2
|
||||
ror EBP4 ; 2
|
||||
|
||||
; branch if carry set
|
||||
bcs label_11f ; 2
|
||||
|
||||
; 16-bit increment of color
|
||||
inc COLORL ; 2
|
||||
bne no_oflo ; 2
|
||||
inc COLORH ; 2
|
||||
no_oflo:
|
||||
|
||||
; 16-bit add of X-coord by 0x80
|
||||
; this keeps the drawing roughly to the 280x192 screen
|
||||
; carry should still be clear (inc doesn't set it)
|
||||
lda XCOORDL ; 2
|
||||
adc #$80 ; 2
|
||||
sta XCOORDL ; 2
|
||||
bcc no_oflo2 ; 2
|
||||
inc XCOORDH ; 2
|
||||
no_oflo2:
|
||||
|
||||
; 16-bit negate of Y-coord
|
||||
sec ; 1
|
||||
lda #0 ; 2
|
||||
sbc YCOORDL ; 2
|
||||
sta YCOORDL ; 2
|
||||
lda #0 ; 2
|
||||
sbc YCOORDH ; 2
|
||||
sta YCOORDH ; 2
|
||||
|
||||
label_11f:
|
||||
|
||||
; skipping the color manipulation done here by original
|
||||
|
||||
; mix colors a bit?
|
||||
|
||||
; 16-bit shift of color
|
||||
; 2nd is a rotate as asl doesn't shift in cary
|
||||
|
||||
lda COLORL ; 2
|
||||
asl ; 1 ; shl %ax
|
||||
rol COLORH ; 2
|
||||
eor COLORH ; 2
|
||||
sta COLORL ; 2
|
||||
|
||||
; get color mapping
|
||||
; using a color lookup table looks best but too many bytes
|
||||
; you can approximate something close to the lookup with
|
||||
; two extra instructions
|
||||
|
||||
and #$7 ; 2
|
||||
smc:
|
||||
ora #$2 ; 2
|
||||
tax ; 1
|
||||
|
||||
; if using color lookup table
|
||||
; tay ; 1
|
||||
; ldx color_lookup,Y ; 3 (could be 2 if we run in zero page)
|
||||
|
||||
; if ycoord negative, loop
|
||||
lda YCOORDH ; 2
|
||||
bmi seasons_forever ; 2
|
||||
|
||||
; if top bits of xcoord, loop
|
||||
lda XCOORDH ; 2
|
||||
and #$f0 ; 2
|
||||
bne seasons_forever ; 2
|
||||
|
||||
put_pixel:
|
||||
|
||||
; actually set the color
|
||||
jsr HCOLOR ; 3 ; color is in X
|
||||
|
||||
; set up paramaters for HPLOT ROM call
|
||||
ldx XCOORDL ; 2 ; x coord in (y:x)
|
||||
ldy XCOORDH ; 2
|
||||
lda YCOORDL ; 2 ; y coord in A
|
||||
jsr HPLOT0 ; 3
|
||||
|
||||
; flip palettes when color at $4200 (roughly 0,32 on screen)
|
||||
; changes. This is sort of arbitrary, but having a 16-bit counter
|
||||
; takes too many instructions and Apple II doesn't have a
|
||||
; programmable timer
|
||||
|
||||
lda $4200 ; 3 ; check colors at 0,32
|
||||
bmi seasons_forever ; 2
|
||||
|
||||
; flip between blue/purple and orange/green palettes
|
||||
; with self-modifying code. 2 bytes are saved when
|
||||
; we execute in the zero page
|
||||
lda smc+1 ; 2
|
||||
eor #$3 ; 2
|
||||
sta smc+1 ; 2
|
||||
|
||||
; the adc/sbc in HPLOT0 leave the V flag clear
|
||||
; so we can save a byte (over jump) by using bvc
|
||||
bvc seasons_forever ; 2
|
||||
|
||||
|
||||
|
||||
|
||||
; Thankfully not necessary for a 128B demo?
|
||||
; lda KEYPRESS ; 3 ; see if key pressed
|
||||
; bpl seasons_forever ; 2 ; loop if not
|
||||
; bit KEYRESET
|
||||
exit_to_prompt:
|
||||
; jsr TEXT ; 3 ; return to text mode
|
||||
; jmp $3D0 ; 3 ; return to Applesoft prompt
|
||||
|
||||
|
||||
;========================================================
|
||||
;========================================================
|
||||
; color lookup tables used when testing
|
||||
; some of them look better, but make the executable bigger
|
||||
; than the AND/OR version of setting colors
|
||||
|
||||
|
||||
; Apple II Hi-Res Colors
|
||||
; It's all NTSC artifacting and complex
|
||||
; There can be color-clash at a 3.5 pixel level
|
||||
; Adjacent on pixels make white, adjacent off make black
|
||||
; Simplistic summary, you can have these 8 colors (6 unique)
|
||||
; 0 = Black0
|
||||
; 1 = Green
|
||||
; 2 = Purple
|
||||
; 3 = White0
|
||||
; 4 = Black1
|
||||
; 5 = Orange
|
||||
; 6 = Blue
|
||||
; 7 = White2
|
||||
|
||||
color_lookup:
|
||||
|
||||
; colorful palette
|
||||
; .byte $01,$01,$02,$03, $05,$05,$06,$07
|
||||
|
||||
; blue and purple palette
|
||||
; .byte $02,$02,$03,$06, $06,$06,$02,$07
|
||||
|
||||
; qkumba ora2 white/blue/purple
|
||||
; .byte $02,$03,$02,$03, $06,$07,$06,$07
|
||||
|
||||
; ora1 white/orange/green
|
||||
; .byte $01,$01,$03,$03, $05,$05,$07,$07
|
||||
|
||||
; better mixed orange/green/white
|
||||
; .byte $01,$03,$03,$03, $05,$05,$07,$07
|
||||
|
||||
; orange and green palette
|
||||
; .byte $01,$01,$03,$05, $05,$05,$01,$07
|
||||
|
||||
; .byte $01,$00,$01,$00, $05,$00,$05,$00
|
||||
|
||||
; "Leaf" Locations
|
||||
; TOP-LEFT ?? CENTER-TOP TOP-RIGHT LEFT ?? CENTER-BOTTOM ??
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user