158 lines
2.9 KiB
C
158 lines
2.9 KiB
C
#include <c64/memmap.h>
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#include <c64/charwin.h>
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#include <c64/cia.h>
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#include <c64/vic.h>
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#include <c64/kernalio.h>
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// Common memory area for all overlays
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#pragma region( main, 0x0900, 0x8000, , , { code, data, bss, heap, stack } )
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// Section and region for first overlay bank
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#pragma overlay( ovl1, 1 )
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#pragma section( bcode1, 0 )
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#pragma section( bdata1, 0 )
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#pragma region(bank1, 0x8000, 0xc000, , 1, { bcode1, bdata1 } )
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// Section and region for second overlay bank
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#pragma overlay( ovl2, 2 )
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#pragma section( bcode2, 0 )
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#pragma section( bdata2, 0 )
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#pragma region(bank2, 0x8000, 0xc000, , 2, { bcode2, bdata2 } )
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#pragma overlay( ovl3, 3 )
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#pragma section( bcode3, 0 )
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#pragma section( bdata3, 0 )
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#pragma region(bank3, 0x8000, 0xc000, , 3, { bcode3, bdata3 } )
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#pragma overlay( ovl4, 4 )
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#pragma section( bcode4, 0 )
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#pragma section( bdata4, 0 )
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#pragma region(bank4, 0x8000, 0xc000, , 4, { bcode4, bdata4 } )
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#pragma overlay( ovl5, 5 )
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#pragma section( bcode5, 0 )
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#pragma section( bdata5, 0 )
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#pragma region(bank5, 0x8000, 0xc000, , 5, { bcode5, bdata5 } )
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#pragma overlay( ovl6, 6 )
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#pragma section( bcode6, 0 )
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#pragma section( bdata6, 0 )
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#pragma region(bank6, 0x8000, 0xc000, , 6, { bcode6, bdata6 } )
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// Charwin in shared memory section
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CharWin cw;
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// Now switch code generation to bank 1
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#pragma code ( bcode1 )
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#pragma data ( bdata1 )
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// Print into shared charwin
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void print1(void)
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{
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cwin_put_string(&cw, p"This is first overlay", 7);
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cwin_cursor_newline(&cw);
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}
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// Now switch code generation to bank 2
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#pragma code ( bcode2 )
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#pragma data ( bdata2 )
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void print2(void)
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{
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cwin_put_string(&cw, p"This is second overlay", 7);
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cwin_cursor_newline(&cw);
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}
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#pragma code ( bcode3 )
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#pragma data ( bdata3 )
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void print3(void)
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{
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cwin_put_string(&cw, p"This is third overlay", 7);
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cwin_cursor_newline(&cw);
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}
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#pragma code ( bcode4 )
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#pragma data ( bdata4 )
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void print4(void)
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{
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cwin_put_string(&cw, p"This is fourth overlay", 7);
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cwin_cursor_newline(&cw);
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}
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#pragma code ( bcode5 )
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#pragma data ( bdata5 )
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void print5(void)
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{
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cwin_put_string(&cw, p"This is fifth overlay", 7);
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cwin_cursor_newline(&cw);
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}
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#pragma code ( bcode6 )
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#pragma data ( bdata6 )
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void print6(void)
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{
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cwin_put_string(&cw, p"This is sixth overlay", 7);
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cwin_cursor_newline(&cw);
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}
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// Switching code generation back to shared section
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#pragma code ( code )
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#pragma data ( data )
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// Load an overlay section into memory
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void load(const char * fname)
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{
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krnio_setnam(fname);
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krnio_load(1, 8, 1);
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}
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int main(void)
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{
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// Kernal memory only
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mmap_set(MMAP_NO_BASIC);
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// Init VIC
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vic_setmode(VICM_TEXT, (char *)0x0400, (char *)0x1800);
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// Prepare output window
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cwin_init(&cw, (char *)0x0400, 0, 0, 40, 25);
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cwin_clear(&cw);
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// Call function in overlay 1
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load(P"OVL1");
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print1();
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// Call function in overlay 2
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load(P"OVL2");
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print2();
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load(P"OVL3");
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print3();
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load(P"OVL4");
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print4();
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load(P"OVL5");
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print5();
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load(P"OVL6");
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print6();
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mmap_set(MMAP_ROM);
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return 0;
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}
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