58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
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#include <proto/exec.h>
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#include <proto/dos.h>
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#include <exec/exec.h>
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#include <clib/exec_protos.h>
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#include <clib/graphics_protos.h>
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#include <hardware/dmabits.h>
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#include <hardware/custom.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define MEMORY_SIZE (100)
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extern struct Custom custom;
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UBYTE *buffer;
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UBYTE *target;
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void cleanUp() {
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if (buffer) FreeMem(buffer, MEMORY_SIZE);
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if (target) FreeMem(target, MEMORY_SIZE);
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}
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int main() {
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atexit(cleanUp);
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buffer = AllocMem(MEMORY_SIZE, MEMF_CLEAR);
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target = AllocMem(MEMORY_SIZE, MEMF_CLEAR);
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strcpy((char*)buffer, "Agnus copied me since I am in Chip RAM. Thanks, Agnus!");
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strcpy((char*)target, "Oh no, the blitter can't work with me since I'm in Fast RAM (or Slow RAM).");
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// Agnus blitter stuff
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OwnBlitter(); WaitBlit(); // Wait for the blitter to finish up its current operation.
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custom.bltcon0 = 0x09f0;
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custom.bltcon1 = 0;
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custom.bltapt = buffer;
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custom.bltdpt = target;
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custom.bltamod = 0;
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custom.bltdmod = 0;
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custom.bltafwm = 0xffff;
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custom.bltalwm = 0xffff;
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// Setting bltsize starts the blitter operation
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custom.bltsize = (1 * 64) + (MEMORY_SIZE / 2); // 1 "row", convert byte width to words
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DisownBlitter(); WaitBlit(); // Wait before we do anything else with the Chip RAM we (might) have.
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printf("\n%s\n\n", target);
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if (buffer) FreeMem(buffer, MEMORY_SIZE);
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if (target) FreeMem(target, MEMORY_SIZE);
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buffer = 0;
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target = 0;
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}
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