mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-06-27 07:29:29 +00:00
tfv: have RLE image loading working
forgot how much I hate 6502 assembler
This commit is contained in:
Vince Weaver
parent
2bedb2b369
commit
a8970f761b
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@ -44,6 +44,8 @@ unsigned char a,y,x;
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#define COLOR 0x30
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#define FIRST 0xF0
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#define TEMP 0xFA
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static SDL_Surface *sdl_screen=NULL;
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int grsim_input(void) {
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@ -487,45 +489,68 @@ int home(void) {
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int grsim_unrle(unsigned char *rle_data, int address) {
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int i,total=0;
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// int xoffset=0;
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// int yoffset=0;
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int xsize,ysize,end,run,value;
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unsigned char *out_pointer;
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int offset,x=0,y=0;
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unsigned char s;
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// int out_pointer;
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xsize=rle_data[0];
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ysize=rle_data[1];
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ram[GBASL]=0; // input address
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ram[GBASH]=0;
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end=xsize*(ysize/2);
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out_pointer=ram+address;
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offset=2;
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x=0;
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y=0;
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ram[BASL]=address&0xff;
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ram[BASH]=address>>8;
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ram[CV]=0;
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ram[CH]=rle_data[y_indirect(GBASL,y)];
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y++;
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// ysize=rle_data[1];
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y++;
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while(1) {
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run=rle_data[offset];
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offset++;
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value=rle_data[offset];
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offset++;
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a=rle_data[y_indirect(GBASL,y)];
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if (a==0xff) break;
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ram[TEMP]=a;
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for(i=0;i<run;i++) {
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*out_pointer=value;
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out_pointer++;
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total++;
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y++;
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if (y==0) ram[GBASH]++;
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a=rle_data[y_indirect(GBASL,y)];
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y++;
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if (y==0) ram[GBASH]++;
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s=y;
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y=0;
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while(1) {
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ram[y_indirect(BASL,y)]=a;
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ram[BASL]++;
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if (ram[BASL]==0) ram[BASH]++;
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x++;
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if (x>=40) {
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out_pointer+=0x58;
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y+=2;
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if (y>14) {
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y=0;
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out_pointer-=(0x400-0x28);
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// printf("%d %x\n",y,address+(y/2)*0x80);
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if (x>=ram[CH]) {
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if (ram[BASL]>0xa7) ram[BASH]++;
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ram[BASL]+=0x58;
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ram[CV]+=2;
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if (ram[CV]>14) {
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ram[CV]=0;
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if (ram[BASL]<0xd8) {
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ram[BASL]=ram[BASL]-0xd8;
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ram[BASH]=ram[BASH]-0x4;
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}
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else {
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ram[BASL]=ram[BASL]-0xd8;
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ram[BASH]=ram[BASH]-0x3;
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}
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}
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x=0;
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}
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ram[TEMP]--;
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if (ram[TEMP]==0) break;
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}
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if (total>=end) break;
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y=s;
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}
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return 0;
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@ -26,7 +26,8 @@ static unsigned char title_rle[]=
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0x0C,0x00,0x02,0xCC,0x01,0x44,0x01,0x55,0x09,0x00,0x01,0x0D,0x01,0x00,0x01,0xBB,0x03,0xB1,0x01,0xBB,0x01,0x00,0x01,0x0D,0x04,0x00,0x02,0xBB,
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0x0C,0x00,0x01,0x0C,0x01,0x4C,0x01,0x44,0x01,0x55,0x0C,0x00,0x02,0xBB,0x06,0x00,0x01,0x20,0x01,0x22,0x01,0x2B,0x01,0x0B,
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0x0E,0x00, 0x02,0x05, 0x09,0x00, 0x01,0x20, 0x06,0x22, 0x03,0x20,
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0x02,0x22, 0x01,0x02, 0x0a,0x0,
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0x02,0x22, 0x01,0x02, 0x09,0x00,
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0xff,0xff
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// " 55 2222222222222"
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};
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@ -5,10 +5,17 @@ PNG2GR = ../gr-utils/png2gr
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all: tfv.dsk
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tfv.dsk: TITLE.GR ED
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tfv.dsk: TITLE.GR TFV ED
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$(DOS33) -y tfv.dsk BSAVE -a 0xc00 TFV
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$(DOS33) -y tfv.dsk BSAVE -a 0x400 TITLE.GR
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$(DOS33) -y tfv.dsk BSAVE -a 0x900 ED
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TFV: tfv.o
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ld65 -o TFV tfv.o -C ./apple2_c00.inc
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tfv.o: tfv.s title.inc
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ca65 -o tfv.o tfv.s -l tfv.lst
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ED: duet.o
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ld65 -o ED duet.o -C ./apple2_900.inc
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187
tfv/tfv.s
Normal file
187
tfv/tfv.s
Normal file
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@ -0,0 +1,187 @@
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.define EQU =
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;; SOFT SWITCHES
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GR EQU $C050
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TEXT EQU $C051
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FULLGR EQU $C052
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TEXTGR EQU $C053
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PAGE0 EQU $C054
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PAGE1 EQU $C055
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LORES EQU $C056
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HIRES EQU $C057
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;; MONITOR ROUTINES
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HLINE EQU $F819 ;; HLINE Y,$2C at A
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VLINE EQU $F828 ;; VLINE A,$2D at Y
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CLRSCR EQU $F832 ;; Clear low-res screen
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CLRTOP EQU $F836 ;; clear only top of low-res screen
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SETCOL EQU $F864 ;; COLOR=A
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BASCALC EQU $FBC1 ;;
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HOME EQU $FC58 ;; Clear the text screen
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WAIT EQU $FCA8 ;; delay 1/2(26+27A+5A^2) us
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SETINV EQU $FE80 ;; INVERSE
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SETNORM EQU $FE84 ;; NORMAL
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COUT1 EQU $FDF0 ;; output A to screen
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;; Zero page addresses
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WNDLFT EQU $20
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WNDWDTH EQU $21
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WNDTOP EQU $22
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WNDBTM EQU $23
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CH EQU $24
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CV EQU $25
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GBASL EQU $26
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GBASH EQU $27
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BASL EQU $28
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BASH EQU $29
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H2 EQU $2C
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V2 EQU $2D
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MASK EQU $2E
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COLOR EQU $30
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FIRST EQU $F0
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TEMP EQU $FA
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RUN EQU $FA
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TEMP2 EQU $FB
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;=============================
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; set low-res graphics, page 0
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;=============================
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jsr HOME
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jsr set_gr_page0
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;=================
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; clear the screen
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;=================
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jsr CLRTOP
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lda #>(title_image)
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sta GBASH
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lda #<(title_image)
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sta GBASL
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jsr load_rle_gr
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lda #$4
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sta BASH
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lda #$0
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sta BASL ; 0x400 is GR page 0
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; Return to BASIC?
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rts
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;=================
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; load RLE image
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;=================
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; Output is BASH/BASL
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; Input is in GBASH/GBASL
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load_rle_gr:
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lda #$0
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tax
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tay ; init X and Y to 0
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sta CV ; ycoord=0
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lda (GBASL),y ; load xsize
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sta CH
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iny ; (we should check if we had
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; bad luck and overflows page)
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rle_loop:
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lda (GBASL),y ; load run value
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cmp #$ff ; if 0xff
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beq rle_done ; we are done
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sta RUN
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iny ; point to next value
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bne rle_yskip1 ; if overflow, increment address
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inc GBASH
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rle_yskip1:
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lda (GBASL),y ; load value to write
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iny
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bne rle_yskip2
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inc GBASH
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rle_yskip2:
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sty TEMP2 ; save y for later
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pha
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lda #$0
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tay
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pla ; convoluted way to set y to 0
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rle_run_loop:
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sta (BASL),y
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inc BASL
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bne rle_skip3
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inc BASH ; write out value
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rle_skip3:
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inx
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cpx CH
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bcc rle_not_eol ; branch if less than
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pha
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lda BASL
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cmp #$a7
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bcc rle_add_skip
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inc BASH
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rle_add_skip:
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clc
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adc #$58
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sta BASL
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inc CV
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inc CV
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lda CV
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cmp #15
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bcc rle_no_wrap
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lda #$0
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sta CV
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sec ; set carry for borrow purpose
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lda BASL
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sbc #$d8 ; perform subtraction on the LSBs
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sta BASL
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lda BASH ; do the same for the MSBs, with carry
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sbc #$3 ; set according to the previous result
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sta BASH
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rle_no_wrap:
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lda #$0
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tax
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pla
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rle_not_eol:
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dec RUN
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bne rle_run_loop
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ldy TEMP2
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sec
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bcs rle_loop
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rle_done:
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lda #$15
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sta CV
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rts
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;==========================================================
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; set_text_page0
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;==========================================================
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;
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set_text_page0:
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bit PAGE0 ; set page0
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bit TEXT ; set text mode
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rts
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;==========================================================
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; set_gr_page0
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;==========================================================
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;
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set_gr_page0:
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;lda #4
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;sta GR_PAGE
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bit PAGE0 ; set page 0
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bit LORES ; Lo-res graphics
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bit TEXTGR ; mixed gr/text mode
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bit GR ; set graphics
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rts
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.include "title.inc"
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38
tfv/title.inc
Normal file
38
tfv/title.inc
Normal file
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@ -0,0 +1,38 @@
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title_image:
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.byte $28
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.byte $01,$00,$19,$20
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.byte $0F,$00,$01,$22,$03,$66,$01,$22,$01,$62
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.byte $01,$66,$01,$62,$01,$22,$01,$66,$03,$22
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.byte $01,$66,$01,$26,$01,$62,$01,$22,$01,$62
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.byte $01,$26,$01,$62,$01,$22,$03,$66,$01,$22
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.byte $01,$55,$01,$00,$03,$11,$01,$44,$03,$22
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.byte $01,$44,$03,$22
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.byte $02,$00,$02,$22,$01,$66,$02,$22,$01,$66
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.byte $01,$62,$01,$66,$01,$22,$01,$66,$03,$22
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.byte $01,$66,$01,$26,$01,$62,$01,$22,$01,$66
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.byte $01,$22,$01,$66,$02,$22,$01,$66,$02,$22
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.byte $01,$55,$01,$00,$01,$01,$01,$11,$01,$41
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.byte $01,$44,$01,$42,$01,$22,$01,$42,$01,$44
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.byte $01,$42,$01,$22,$01,$02
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.byte $02,$00,$02,$22,$01,$66,$02,$22,$01,$66,$01,$22,$01,$66,$01,$22,$03,$66,$01,$22,$01,$66,$01,$62,$01,$26,$01,$22,$01,$26,$01,$62,$01,$26,$02,$22,$01,$66,$02,$22,$01,$55,$02,$00,$01,$11,$03,$44,$01,$22,$03,$44,$01,$22
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.byte $03,$00,$01,$02,$18,$52,$01,$55
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.byte $0E,$00,$1E,$60
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.byte $0A,$00,$01,$66,$03,$22,$01,$66,$01,$26,$01,$22,$01,$26,$01,$66,$01,$22,$01,$26,$01,$66,$01,$22,$01,$66,$03,$22,$01,$66,$01,$26,$01,$22,$01,$26,$01,$66,$01,$26,$02,$62,$01,$66,$01,$22,$01,$66,$01,$22,$01,$66,$01,$55
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.byte $09,$00,$01,$66,$01,$22,$01,$26,$02,$66,$01,$22,$01,$26,$01,$22,$01,$66,$01,$22,$01,$62,$01,$26,$01,$22,$02,$66,$01,$22,$02,$66,$01,$22,$01,$26,$01,$22,$01,$66,$01,$22,$02,$26,$01,$66,$01,$62,$01,$26,$01,$62,$01,$66,$01,$55
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.byte $09,$00,$01,$66,$01,$22,$03,$66,$01,$22,$01,$66,$01,$22,$01,$66,$01,$22,$01,$66,$01,$62,$01,$22,$02,$66,$01,$22,$02,$66,$01,$22,$01,$66,$01,$22,$01,$66,$02,$26,$01,$22,$02,$66,$01,$22,$02,$66,$01,$55
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.byte $09,$00,$01,$06,$1D,$56,$01,$55,$03,$00,$01,$10
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.byte $24,$00,$01,$10,$01,$00,$01,$10,$01,$11,$01,$01
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.byte $05,$00,$08,$CC,$01,$40,$09,$00,$01,$D0,$01,$0D,$01,$00,$01,$D0,$01,$0D,$01,$00,$01,$D0,$05,$00,$01,$11
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.byte $0A,$00,$01,$04,$04,$54,$02,$CC,$01,$44,$01,$55,$06,$00,$01,$D0,$01,$DD,$02,$D0,$01,$DD,$02,$D0,$01,$DD,$01,$D0,$03,$00,$02,$01,$01,$11,$02,$01
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.byte $0C,$00,$02,$CC,$01,$44,$01,$54,$01,$55,$06,$00,$01,$DD,$07,$BB,$01,$DD,$04,$00,$01,$10,$01,$11,$01,$10
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.byte $0C,$00,$02,$CC,$01,$44,$01,$54,$01,$55,$07,$00,$01,$DD,$01,$BB,$01,$BF,$01,$B0,$01,$BB,$01,$BF,$01,$B0,$01,$BB,$01,$DD,$03,$00,$01,$10,$03,$11,$01,$10
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.byte $0A,$00,$02,$CC,$01,$44,$01,$54,$01,$55,$08,$00,$01,$DD,$01,$DB,$01,$BB,$01,$3B,$01,$33,$02,$BB,$01,$DB,$01,$DD,$03,$00,$02,$01,$01,$11,$02,$01
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.byte $0A,$00,$02,$CC,$01,$44,$01,$55,$09,$00,$02,$DD,$05,$BB,$02,$DD,$05,$00,$01,$11
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.byte $0C,$00,$02,$CC,$01,$44,$01,$55,$09,$00,$01,$0D,$01,$00,$01,$BB,$03,$B1,$01,$BB,$01,$00,$01,$0D,$04,$00,$02,$BB
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.byte $0C,$00,$01,$0C,$01,$4C,$01,$44,$01,$55,$0C,$00,$02,$BB,$06,$00,$01,$20,$01,$22,$01,$2B,$01,$0B
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.byte $0E,$00,$02,$05,$09,$00,$01,$20,$06,$22,$03,$20
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.byte $02,$22,$01,$02,$09,$00
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.byte $ff,$ff
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