
asm("    push   es");      /* save segment register */
asm("    mov   ax, 034h"); /* use the Phar Lap Local Descriptor Table (LDT) */
asm("    mov   es, ax");   /*   segment selector 034h to access real memory */
ebx = addr;                /* real memory address desired */
cl = val;                  /* byte value to poke */
asm(ebx, cl, "    mov   byte ptr es:[ebx], cl"); /* poke it */
asm("    pop   es")        /* restore segment register */

