Home » Archimedes archive » Acorn User » AU 1998-06 A.adf » Regulars » StarInfo/Mellor/c/SyrupSmall
StarInfo/Mellor/c/SyrupSmall
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Archimedes archive » Acorn User » AU 1998-06 A.adf » Regulars |
| Filename: | StarInfo/Mellor/c/SyrupSmall |
| Read OK: | ✔ |
| File size: | 0FF6 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
/* SyrupSmall source code By Philip Mellor
Written within 24 hours of buying Easy C++ ! */
#include "stdio.h"
#include "roslib.h"
#include "swis.h"
#include "math.h"
#include "kernel.h"
#include "stdlib.h"
/* global variables */
int bank_num=1;
int swap_banks()
{
_kernel_swi_regs r_in, r_out;
bank_num = 3 - bank_num;
r_in.r[0] = 112;
r_in.r[1] = bank_num;
_kernel_swi(6, &r_in, &r_out);
}
int main(void)
{ _kernel_swi_regs r_in, r_out;
/* select screen mode 15 first to ensure 2x80k screens */
os_mode(15);
os_mode(13);
os_cursor(0);
r_in.r[0] = 2;
_kernel_swi(OS_ReadDynamicArea, &r_in, &r_out);
if (r_out.r[1] < (160*1024))
{ printf("You need at least 160k screen memory.");
exit(EXIT_FAILURE);
}
/* some lovely variables */
int num, mx, my, sx, sy, xpos, offset;
int oldangle, angle, a;
/* set up all that memory gubbins */
int *ptr;
ptr = malloc(256);
char *screen_address;
char *screen_address_bank;
char *screen_address_temp;
/*find out the location of the screen memory*/
*(ptr) = 148;
*(ptr+1) = -1;
r_in.r[0] = ptr;
r_in.r[1] = ptr;
_kernel_swi(OS_ReadVduVariables, &r_in, &r_out);
int start = *(ptr);
screen_address=(char *)start;
/*select the screen bank*/
r_in.r[0] = 112;
r_in.r[1] = 3-bank_num;
_kernel_swi(6, &r_in, &r_out);
/*find out the location of the screen bank memory*/
*(ptr) = 148;
*(ptr+1) = -1;
r_in.r[0] = ptr;
r_in.r[1] = ptr;
_kernel_swi(OS_ReadVduVariables, &r_in, &r_out);
start = *(ptr);
screen_address_bank=(char *)start;
/*select the first bank*/
r_in.r[0] = 112;
r_in.r[1] = bank_num;
_kernel_swi(6, &r_in, &r_out);
/* calculate colour look-up table */
int red, green, blue, c2;
struct colourdata {
int d1 [256];
int d2 [256];
};
struct colourdata colour;
float fraction;
for (float c=0; c<256; c+=1)
{
/* use the ever-popular ColourTrans_ConvertHSVToRGB
to choose the colours */
fraction = c*1.40625*65536;
r_in.r[0] = fraction;
r_in.r[1] = 65000;
r_in.r[2] = 255;
_kernel_swi(ColourTrans_ConvertHSVToRGB, &r_in, &r_out);
red = r_out.r[0];
green = r_out.r[1];
blue = r_out.r[2];
/* a bit of a cheat to select the colour
but never mind, it works, and that's the main thing... */
r_in.r[0] = (red<<8) + (green<<16) + (blue<<24);
r_in.r[3] = 256;
r_in.r[4] = 0;
_kernel_swi(ColourTrans_SetGCOL, &r_in, &r_out);
os_circlefill(0,1023,32); /* hello mr. bodge... */
c2 = (float) c;
colour.d1[c2] = *(screen_address + 321); /* selects 2 colours */
colour.d2[c2] = *(screen_address + 322); /* so we can do dithering */
}
/* quick mr bodge! remove your evidence! */
os_cls();
os_gcol(0,63);
os_tint(2, 3);
/* keep on going 'till we hit Escape */
while (!os_inkey(-113))
{
/* change the offset every loop to add to
the colour cycling effect type thing */
offset+=1;
if (offset>255)
offset=0;
xpos = 80;
for (int i=(320*48)+79; i<(320*208)-160; i+=2)
{
xpos+=2;
if (xpos==240)
{ xpos = 80;
i+=480;
}
/* read screen memory and smooth it all out... */
num =(
*(screen_address_bank + i - 2)
+ *(screen_address_bank + i + 2)
+ *(screen_address_bank + i + 640)
+ *(screen_address_bank + i - 640)
) >> 2;
/* re-write it again */
*(screen_address_bank + i) = num;
/* offset it by the colour shift offset effort gubbins */
num+=offset;
if (num>255)
num-=255;
if (num<0)
num+=255;
/* plot 4 pixels on screen with dithering (d1 and d2) */
*(screen_address + i) = colour.d1[num];
*(screen_address + i + 1) = colour.d2[num];
*(screen_address + i +320) = colour.d2[num];
*(screen_address + i + 321) = colour.d1[num];
}
/* wait for that there v-sync */
os_cli("fx19");
/* mousetrap! */
_kernel_swi(OS_Mouse, &r_in, &r_out);
/* plot the mouse 'pointer' onto the screen bank */
swap_banks();
os_circlefill(r_out.r[0], r_out.r[1], (r_out.r[2]+2)*8 );
swap_banks();
/* round and round we go... */
}
/* that's all folks */
}
00000000 2f 2a 20 20 20 20 20 20 53 79 72 75 70 53 6d 61 |/* SyrupSma|
00000010 6c 6c 20 73 6f 75 72 63 65 20 63 6f 64 65 20 20 |ll source code |
00000020 42 79 20 50 68 69 6c 69 70 20 4d 65 6c 6c 6f 72 |By Philip Mellor|
00000030 0a 20 20 20 57 72 69 74 74 65 6e 20 77 69 74 68 |. Written with|
00000040 69 6e 20 32 34 20 68 6f 75 72 73 20 6f 66 20 62 |in 24 hours of b|
00000050 75 79 69 6e 67 20 45 61 73 79 20 43 2b 2b 20 21 |uying Easy C++ !|
00000060 20 2a 2f 0a 0a 23 69 6e 63 6c 75 64 65 20 22 73 | */..#include "s|
00000070 74 64 69 6f 2e 68 22 0a 23 69 6e 63 6c 75 64 65 |tdio.h".#include|
00000080 20 22 72 6f 73 6c 69 62 2e 68 22 0a 23 69 6e 63 | "roslib.h".#inc|
00000090 6c 75 64 65 20 22 73 77 69 73 2e 68 22 0a 23 69 |lude "swis.h".#i|
000000a0 6e 63 6c 75 64 65 20 22 6d 61 74 68 2e 68 22 0a |nclude "math.h".|
000000b0 23 69 6e 63 6c 75 64 65 20 22 6b 65 72 6e 65 6c |#include "kernel|
000000c0 2e 68 22 0a 23 69 6e 63 6c 75 64 65 20 22 73 74 |.h".#include "st|
000000d0 64 6c 69 62 2e 68 22 0a 0a 2f 2a 20 67 6c 6f 62 |dlib.h"../* glob|
000000e0 61 6c 20 76 61 72 69 61 62 6c 65 73 20 2a 2f 0a |al variables */.|
000000f0 69 6e 74 20 62 61 6e 6b 5f 6e 75 6d 3d 31 3b 0a |int bank_num=1;.|
00000100 0a 69 6e 74 20 73 77 61 70 5f 62 61 6e 6b 73 28 |.int swap_banks(|
00000110 29 0a 7b 0a 20 20 5f 6b 65 72 6e 65 6c 5f 73 77 |).{. _kernel_sw|
00000120 69 5f 72 65 67 73 20 72 5f 69 6e 2c 20 72 5f 6f |i_regs r_in, r_o|
00000130 75 74 3b 0a 20 20 62 61 6e 6b 5f 6e 75 6d 20 3d |ut;. bank_num =|
00000140 20 33 20 2d 20 62 61 6e 6b 5f 6e 75 6d 3b 0a 20 | 3 - bank_num;. |
00000150 20 72 5f 69 6e 2e 72 5b 30 5d 20 3d 20 31 31 32 | r_in.r[0] = 112|
00000160 3b 0a 20 20 72 5f 69 6e 2e 72 5b 31 5d 20 3d 20 |;. r_in.r[1] = |
00000170 62 61 6e 6b 5f 6e 75 6d 3b 0a 20 20 5f 6b 65 72 |bank_num;. _ker|
00000180 6e 65 6c 5f 73 77 69 28 36 2c 20 26 72 5f 69 6e |nel_swi(6, &r_in|
00000190 2c 20 26 72 5f 6f 75 74 29 3b 0a 7d 0a 0a 69 6e |, &r_out);.}..in|
000001a0 74 20 6d 61 69 6e 28 76 6f 69 64 29 0a 7b 20 5f |t main(void).{ _|
000001b0 6b 65 72 6e 65 6c 5f 73 77 69 5f 72 65 67 73 20 |kernel_swi_regs |
000001c0 72 5f 69 6e 2c 20 72 5f 6f 75 74 3b 0a 0a 2f 2a |r_in, r_out;../*|
000001d0 20 73 65 6c 65 63 74 20 73 63 72 65 65 6e 20 6d | select screen m|
000001e0 6f 64 65 20 31 35 20 66 69 72 73 74 20 74 6f 20 |ode 15 first to |
000001f0 65 6e 73 75 72 65 20 32 78 38 30 6b 20 73 63 72 |ensure 2x80k scr|
00000200 65 65 6e 73 20 2a 2f 0a 20 20 6f 73 5f 6d 6f 64 |eens */. os_mod|
00000210 65 28 31 35 29 3b 0a 20 20 6f 73 5f 6d 6f 64 65 |e(15);. os_mode|
00000220 28 31 33 29 3b 0a 20 20 6f 73 5f 63 75 72 73 6f |(13);. os_curso|
00000230 72 28 30 29 3b 0a 0a 20 20 72 5f 69 6e 2e 72 5b |r(0);.. r_in.r[|
00000240 30 5d 20 3d 20 32 3b 0a 20 20 5f 6b 65 72 6e 65 |0] = 2;. _kerne|
00000250 6c 5f 73 77 69 28 4f 53 5f 52 65 61 64 44 79 6e |l_swi(OS_ReadDyn|
00000260 61 6d 69 63 41 72 65 61 2c 20 26 72 5f 69 6e 2c |amicArea, &r_in,|
00000270 20 26 72 5f 6f 75 74 29 3b 0a 20 20 69 66 20 28 | &r_out);. if (|
00000280 72 5f 6f 75 74 2e 72 5b 31 5d 20 3c 20 28 31 36 |r_out.r[1] < (16|
00000290 30 2a 31 30 32 34 29 29 0a 20 20 7b 20 70 72 69 |0*1024)). { pri|
000002a0 6e 74 66 28 22 59 6f 75 20 6e 65 65 64 20 61 74 |ntf("You need at|
000002b0 20 6c 65 61 73 74 20 31 36 30 6b 20 73 63 72 65 | least 160k scre|
000002c0 65 6e 20 6d 65 6d 6f 72 79 2e 22 29 3b 0a 20 20 |en memory.");. |
000002d0 20 20 65 78 69 74 28 45 58 49 54 5f 46 41 49 4c | exit(EXIT_FAIL|
000002e0 55 52 45 29 3b 0a 20 20 7d 0a 0a 2f 2a 20 73 6f |URE);. }../* so|
000002f0 6d 65 20 6c 6f 76 65 6c 79 20 76 61 72 69 61 62 |me lovely variab|
00000300 6c 65 73 20 2a 2f 0a 20 20 69 6e 74 20 6e 75 6d |les */. int num|
00000310 2c 20 6d 78 2c 20 6d 79 2c 20 73 78 2c 20 73 79 |, mx, my, sx, sy|
00000320 2c 20 78 70 6f 73 2c 20 6f 66 66 73 65 74 3b 0a |, xpos, offset;.|
00000330 20 20 69 6e 74 20 6f 6c 64 61 6e 67 6c 65 2c 20 | int oldangle, |
00000340 61 6e 67 6c 65 2c 20 61 3b 0a 0a 2f 2a 20 73 65 |angle, a;../* se|
00000350 74 20 75 70 20 61 6c 6c 20 74 68 61 74 20 6d 65 |t up all that me|
00000360 6d 6f 72 79 20 67 75 62 62 69 6e 73 20 2a 2f 0a |mory gubbins */.|
00000370 20 20 69 6e 74 20 2a 70 74 72 3b 0a 20 20 70 74 | int *ptr;. pt|
00000380 72 20 3d 20 6d 61 6c 6c 6f 63 28 32 35 36 29 3b |r = malloc(256);|
00000390 0a 0a 20 20 63 68 61 72 20 2a 73 63 72 65 65 6e |.. char *screen|
000003a0 5f 61 64 64 72 65 73 73 3b 0a 20 20 63 68 61 72 |_address;. char|
000003b0 20 2a 73 63 72 65 65 6e 5f 61 64 64 72 65 73 73 | *screen_address|
000003c0 5f 62 61 6e 6b 3b 0a 20 20 63 68 61 72 20 2a 73 |_bank;. char *s|
000003d0 63 72 65 65 6e 5f 61 64 64 72 65 73 73 5f 74 65 |creen_address_te|
000003e0 6d 70 3b 0a 0a 2f 2a 66 69 6e 64 20 6f 75 74 20 |mp;../*find out |
000003f0 74 68 65 20 6c 6f 63 61 74 69 6f 6e 20 6f 66 20 |the location of |
00000400 74 68 65 20 73 63 72 65 65 6e 20 6d 65 6d 6f 72 |the screen memor|
00000410 79 2a 2f 0a 20 20 2a 28 70 74 72 29 20 3d 20 31 |y*/. *(ptr) = 1|
00000420 34 38 3b 0a 20 20 2a 28 70 74 72 2b 31 29 20 3d |48;. *(ptr+1) =|
00000430 20 2d 31 3b 0a 20 20 72 5f 69 6e 2e 72 5b 30 5d | -1;. r_in.r[0]|
00000440 20 3d 20 70 74 72 3b 0a 20 20 72 5f 69 6e 2e 72 | = ptr;. r_in.r|
00000450 5b 31 5d 20 3d 20 70 74 72 3b 0a 20 20 5f 6b 65 |[1] = ptr;. _ke|
00000460 72 6e 65 6c 5f 73 77 69 28 4f 53 5f 52 65 61 64 |rnel_swi(OS_Read|
00000470 56 64 75 56 61 72 69 61 62 6c 65 73 2c 20 26 72 |VduVariables, &r|
00000480 5f 69 6e 2c 20 26 72 5f 6f 75 74 29 3b 0a 20 20 |_in, &r_out);. |
00000490 69 6e 74 20 73 74 61 72 74 20 3d 20 2a 28 70 74 |int start = *(pt|
000004a0 72 29 3b 0a 20 20 73 63 72 65 65 6e 5f 61 64 64 |r);. screen_add|
000004b0 72 65 73 73 3d 28 63 68 61 72 20 2a 29 73 74 61 |ress=(char *)sta|
000004c0 72 74 3b 0a 0a 2f 2a 73 65 6c 65 63 74 20 74 68 |rt;../*select th|
000004d0 65 20 73 63 72 65 65 6e 20 62 61 6e 6b 2a 2f 0a |e screen bank*/.|
000004e0 20 20 72 5f 69 6e 2e 72 5b 30 5d 20 3d 20 31 31 | r_in.r[0] = 11|
000004f0 32 3b 0a 20 20 72 5f 69 6e 2e 72 5b 31 5d 20 3d |2;. r_in.r[1] =|
00000500 20 33 2d 62 61 6e 6b 5f 6e 75 6d 3b 0a 20 20 5f | 3-bank_num;. _|
00000510 6b 65 72 6e 65 6c 5f 73 77 69 28 36 2c 20 26 72 |kernel_swi(6, &r|
00000520 5f 69 6e 2c 20 26 72 5f 6f 75 74 29 3b 0a 0a 2f |_in, &r_out);../|
00000530 2a 66 69 6e 64 20 6f 75 74 20 74 68 65 20 6c 6f |*find out the lo|
00000540 63 61 74 69 6f 6e 20 6f 66 20 74 68 65 20 73 63 |cation of the sc|
00000550 72 65 65 6e 20 62 61 6e 6b 20 6d 65 6d 6f 72 79 |reen bank memory|
00000560 2a 2f 0a 20 20 2a 28 70 74 72 29 20 3d 20 31 34 |*/. *(ptr) = 14|
00000570 38 3b 0a 20 20 2a 28 70 74 72 2b 31 29 20 3d 20 |8;. *(ptr+1) = |
00000580 2d 31 3b 0a 20 20 72 5f 69 6e 2e 72 5b 30 5d 20 |-1;. r_in.r[0] |
00000590 3d 20 70 74 72 3b 0a 20 20 72 5f 69 6e 2e 72 5b |= ptr;. r_in.r[|
000005a0 31 5d 20 3d 20 70 74 72 3b 0a 20 20 5f 6b 65 72 |1] = ptr;. _ker|
000005b0 6e 65 6c 5f 73 77 69 28 4f 53 5f 52 65 61 64 56 |nel_swi(OS_ReadV|
000005c0 64 75 56 61 72 69 61 62 6c 65 73 2c 20 26 72 5f |duVariables, &r_|
000005d0 69 6e 2c 20 26 72 5f 6f 75 74 29 3b 0a 20 20 73 |in, &r_out);. s|
000005e0 74 61 72 74 20 3d 20 2a 28 70 74 72 29 3b 0a 20 |tart = *(ptr);. |
000005f0 20 73 63 72 65 65 6e 5f 61 64 64 72 65 73 73 5f | screen_address_|
00000600 62 61 6e 6b 3d 28 63 68 61 72 20 2a 29 73 74 61 |bank=(char *)sta|
00000610 72 74 3b 0a 0a 2f 2a 73 65 6c 65 63 74 20 74 68 |rt;../*select th|
00000620 65 20 66 69 72 73 74 20 62 61 6e 6b 2a 2f 0a 20 |e first bank*/. |
00000630 20 72 5f 69 6e 2e 72 5b 30 5d 20 3d 20 31 31 32 | r_in.r[0] = 112|
00000640 3b 0a 20 20 72 5f 69 6e 2e 72 5b 31 5d 20 3d 20 |;. r_in.r[1] = |
00000650 62 61 6e 6b 5f 6e 75 6d 3b 0a 20 20 5f 6b 65 72 |bank_num;. _ker|
00000660 6e 65 6c 5f 73 77 69 28 36 2c 20 26 72 5f 69 6e |nel_swi(6, &r_in|
00000670 2c 20 26 72 5f 6f 75 74 29 3b 0a 0a 2f 2a 20 63 |, &r_out);../* c|
00000680 61 6c 63 75 6c 61 74 65 20 63 6f 6c 6f 75 72 20 |alculate colour |
00000690 6c 6f 6f 6b 2d 75 70 20 74 61 62 6c 65 20 2a 2f |look-up table */|
000006a0 0a 0a 20 20 69 6e 74 20 72 65 64 2c 20 67 72 65 |.. int red, gre|
000006b0 65 6e 2c 20 62 6c 75 65 2c 20 63 32 3b 0a 20 20 |en, blue, c2;. |
000006c0 73 74 72 75 63 74 20 63 6f 6c 6f 75 72 64 61 74 |struct colourdat|
000006d0 61 20 7b 0a 20 20 20 69 6e 74 20 64 31 20 5b 32 |a {. int d1 [2|
000006e0 35 36 5d 3b 0a 20 20 20 69 6e 74 20 64 32 20 5b |56];. int d2 [|
000006f0 32 35 36 5d 3b 0a 20 20 7d 3b 0a 0a 20 20 73 74 |256];. };.. st|
00000700 72 75 63 74 20 63 6f 6c 6f 75 72 64 61 74 61 20 |ruct colourdata |
00000710 63 6f 6c 6f 75 72 3b 0a 20 20 66 6c 6f 61 74 20 |colour;. float |
00000720 66 72 61 63 74 69 6f 6e 3b 0a 0a 20 20 66 6f 72 |fraction;.. for|
00000730 20 28 66 6c 6f 61 74 20 63 3d 30 3b 20 63 3c 32 | (float c=0; c<2|
00000740 35 36 3b 20 63 2b 3d 31 29 0a 20 20 7b 0a 0a 2f |56; c+=1). {../|
00000750 2a 20 75 73 65 20 74 68 65 20 65 76 65 72 2d 70 |* use the ever-p|
00000760 6f 70 75 6c 61 72 20 43 6f 6c 6f 75 72 54 72 61 |opular ColourTra|
00000770 6e 73 5f 43 6f 6e 76 65 72 74 48 53 56 54 6f 52 |ns_ConvertHSVToR|
00000780 47 42 0a 20 20 20 74 6f 20 63 68 6f 6f 73 65 20 |GB. to choose |
00000790 74 68 65 20 63 6f 6c 6f 75 72 73 20 2a 2f 0a 0a |the colours */..|
000007a0 20 20 66 72 61 63 74 69 6f 6e 20 3d 20 63 2a 31 | fraction = c*1|
000007b0 2e 34 30 36 32 35 2a 36 35 35 33 36 3b 0a 20 20 |.40625*65536;. |
000007c0 72 5f 69 6e 2e 72 5b 30 5d 20 3d 20 66 72 61 63 |r_in.r[0] = frac|
000007d0 74 69 6f 6e 3b 0a 20 20 72 5f 69 6e 2e 72 5b 31 |tion;. r_in.r[1|
000007e0 5d 20 3d 20 36 35 30 30 30 3b 0a 20 20 72 5f 69 |] = 65000;. r_i|
000007f0 6e 2e 72 5b 32 5d 20 3d 20 32 35 35 3b 0a 20 20 |n.r[2] = 255;. |
00000800 5f 6b 65 72 6e 65 6c 5f 73 77 69 28 43 6f 6c 6f |_kernel_swi(Colo|
00000810 75 72 54 72 61 6e 73 5f 43 6f 6e 76 65 72 74 48 |urTrans_ConvertH|
00000820 53 56 54 6f 52 47 42 2c 20 26 72 5f 69 6e 2c 20 |SVToRGB, &r_in, |
00000830 26 72 5f 6f 75 74 29 3b 0a 20 20 72 65 64 20 3d |&r_out);. red =|
00000840 20 72 5f 6f 75 74 2e 72 5b 30 5d 3b 0a 20 20 67 | r_out.r[0];. g|
00000850 72 65 65 6e 20 3d 20 72 5f 6f 75 74 2e 72 5b 31 |reen = r_out.r[1|
00000860 5d 3b 0a 20 20 62 6c 75 65 20 3d 20 72 5f 6f 75 |];. blue = r_ou|
00000870 74 2e 72 5b 32 5d 3b 0a 0a 2f 2a 20 61 20 62 69 |t.r[2];../* a bi|
00000880 74 20 6f 66 20 61 20 63 68 65 61 74 20 74 6f 20 |t of a cheat to |
00000890 73 65 6c 65 63 74 20 74 68 65 20 63 6f 6c 6f 75 |select the colou|
000008a0 72 0a 20 20 20 62 75 74 20 6e 65 76 65 72 20 6d |r. but never m|
000008b0 69 6e 64 2c 20 69 74 20 77 6f 72 6b 73 2c 20 61 |ind, it works, a|
000008c0 6e 64 20 74 68 61 74 27 73 20 74 68 65 20 6d 61 |nd that's the ma|
000008d0 69 6e 20 74 68 69 6e 67 2e 2e 2e 20 2a 2f 0a 20 |in thing... */. |
000008e0 20 72 5f 69 6e 2e 72 5b 30 5d 20 3d 20 28 72 65 | r_in.r[0] = (re|
000008f0 64 3c 3c 38 29 20 2b 20 28 67 72 65 65 6e 3c 3c |d<<8) + (green<<|
00000900 31 36 29 20 2b 20 28 62 6c 75 65 3c 3c 32 34 29 |16) + (blue<<24)|
00000910 3b 0a 20 20 72 5f 69 6e 2e 72 5b 33 5d 20 3d 20 |;. r_in.r[3] = |
00000920 32 35 36 3b 0a 20 20 72 5f 69 6e 2e 72 5b 34 5d |256;. r_in.r[4]|
00000930 20 3d 20 30 3b 0a 20 20 5f 6b 65 72 6e 65 6c 5f | = 0;. _kernel_|
00000940 73 77 69 28 43 6f 6c 6f 75 72 54 72 61 6e 73 5f |swi(ColourTrans_|
00000950 53 65 74 47 43 4f 4c 2c 20 26 72 5f 69 6e 2c 20 |SetGCOL, &r_in, |
00000960 26 72 5f 6f 75 74 29 3b 0a 0a 20 20 6f 73 5f 63 |&r_out);.. os_c|
00000970 69 72 63 6c 65 66 69 6c 6c 28 30 2c 31 30 32 33 |irclefill(0,1023|
00000980 2c 33 32 29 3b 20 20 20 20 20 20 20 20 20 20 20 |,32); |
00000990 20 20 20 20 20 20 20 20 2f 2a 20 68 65 6c 6c 6f | /* hello|
000009a0 20 6d 72 2e 20 62 6f 64 67 65 2e 2e 2e 20 2a 2f | mr. bodge... */|
000009b0 0a 20 20 63 32 20 3d 20 28 66 6c 6f 61 74 29 20 |. c2 = (float) |
000009c0 63 3b 0a 20 20 63 6f 6c 6f 75 72 2e 64 31 5b 63 |c;. colour.d1[c|
000009d0 32 5d 20 3d 20 2a 28 73 63 72 65 65 6e 5f 61 64 |2] = *(screen_ad|
000009e0 64 72 65 73 73 20 2b 20 33 32 31 29 3b 20 20 20 |dress + 321); |
000009f0 20 2f 2a 20 73 65 6c 65 63 74 73 20 32 20 63 6f | /* selects 2 co|
00000a00 6c 6f 75 72 73 20 2a 2f 0a 20 20 63 6f 6c 6f 75 |lours */. colou|
00000a10 72 2e 64 32 5b 63 32 5d 20 3d 20 2a 28 73 63 72 |r.d2[c2] = *(scr|
00000a20 65 65 6e 5f 61 64 64 72 65 73 73 20 2b 20 33 32 |een_address + 32|
00000a30 32 29 3b 20 20 20 20 2f 2a 20 73 6f 20 77 65 20 |2); /* so we |
00000a40 63 61 6e 20 64 6f 20 64 69 74 68 65 72 69 6e 67 |can do dithering|
00000a50 20 2a 2f 0a 20 20 7d 0a 0a 2f 2a 20 71 75 69 63 | */. }../* quic|
00000a60 6b 20 6d 72 20 62 6f 64 67 65 21 20 72 65 6d 6f |k mr bodge! remo|
00000a70 76 65 20 79 6f 75 72 20 65 76 69 64 65 6e 63 65 |ve your evidence|
00000a80 21 20 2a 2f 0a 20 20 6f 73 5f 63 6c 73 28 29 3b |! */. os_cls();|
00000a90 0a 0a 20 20 6f 73 5f 67 63 6f 6c 28 30 2c 36 33 |.. os_gcol(0,63|
00000aa0 29 3b 0a 20 20 6f 73 5f 74 69 6e 74 28 32 2c 20 |);. os_tint(2, |
00000ab0 33 29 3b 0a 0a 2f 2a 20 6b 65 65 70 20 6f 6e 20 |3);../* keep on |
00000ac0 67 6f 69 6e 67 20 27 74 69 6c 6c 20 77 65 20 68 |going 'till we h|
00000ad0 69 74 20 45 73 63 61 70 65 20 2a 2f 0a 20 20 77 |it Escape */. w|
00000ae0 68 69 6c 65 20 28 21 6f 73 5f 69 6e 6b 65 79 28 |hile (!os_inkey(|
00000af0 2d 31 31 33 29 29 0a 20 20 7b 0a 0a 2f 2a 20 63 |-113)). {../* c|
00000b00 68 61 6e 67 65 20 74 68 65 20 6f 66 66 73 65 74 |hange the offset|
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00000f50 20 62 61 6e 6b 20 2a 2f 0a 20 20 73 77 61 70 5f | bank */. swap_|
00000f60 62 61 6e 6b 73 28 29 3b 0a 20 20 6f 73 5f 63 69 |banks();. os_ci|
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00000fa0 38 20 29 3b 0a 20 20 73 77 61 70 5f 62 61 6e 6b |8 );. swap_bank|
00000fb0 73 28 29 3b 0a 0a 20 20 2f 2a 20 72 6f 75 6e 64 |s();.. /* round|
00000fc0 20 61 6e 64 20 72 6f 75 6e 64 20 77 65 20 67 6f | and round we go|
00000fd0 2e 2e 2e 20 2a 2f 0a 20 20 7d 0a 0a 2f 2a 20 74 |... */. }../* t|
00000fe0 68 61 74 27 73 20 61 6c 6c 20 66 6f 6c 6b 73 20 |hat's all folks |
00000ff0 2a 2f 0a 7d 0a 0a |*/.}..|
00000ff6 
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