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48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/*
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** show some memory stuff
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**
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** 04-Aug-2004, Christian Groessler
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <conio.h>
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#include <atari.h>
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extern int getsp(void); /* comes from ../getsp.s */
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extern char _dos_type; /* bss variable */
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unsigned char data = 0x12; /* data variable */
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unsigned int *APPMHI = (unsigned int *)14; /* 14,15 */
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unsigned char *RAMTOP = (unsigned char *)106; /* in pages */
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unsigned int *LOMEM = (unsigned int *)128; /* used by BASIC */
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unsigned int *MEMTOP = (unsigned int *)741;
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unsigned int *MEMLO = (unsigned int *)743;
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void *allocmem;
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int main(void)
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{
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allocmem = malloc(257);
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clrscr();
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printf(" RAMTOP = %02X (%u) - $%04X (%u)\n",
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*RAMTOP, *RAMTOP, *RAMTOP * 256, *RAMTOP * 256);
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printf(" APPMHI = $%04X (%u)\n", *APPMHI, *APPMHI);
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printf(" LOMEM = $%04X (%u) <BASIC only>\n", *LOMEM, *LOMEM);
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printf(" MEMTOP = $%04X (%u)\n", *MEMTOP, *MEMTOP);
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printf(" MEMLO = $%04X (%u)\n", *MEMLO, *MEMLO);
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printf(" ----------------------\n");
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printf(" main: $%04X (code)\n", &main);
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printf(" data: $%04X (data)\n", &data);
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printf(" _dos_type: $%04X (bss)\n", &_dos_type);
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printf(" allocmem: $%04X (dyn. data)\n", allocmem);
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printf(" sp: $%04X (stack ptr)\n", getsp());
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if (allocmem) free(allocmem);
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if (_dos_type != 1) cgetc();
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return(0);
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}
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