static void xms_helper_init(void)
{
int i;
if (!config.ext_mem)
return;
LWORD(eax) = 0; /* report success */
if (config.xms_size)
return;
config.xms_size = EXTMEM_SIZE >> 10;
x_printf("XMS: initializing XMS... %d handles\n", NUM_HANDLES);
freeHMA = 1;
a20_global = a20_local = 0;
handle_count = 0;
for (i = 0; i < NUM_HANDLES + 1; i++) {
if (handles[i].valid && handles[i].addr)
xms_free(handles[i].addr);
handles[i].valid = 0;
}
smdestroy(&mp);
sminit(&mp, ext_mem_base, config.xms_size * 1024);
smregister_error_notifier(&mp, xx_printf);
}
/*
xms_alloc Allocate XMS Memory
Prototype in: xms.h
Parameters Passed: unsigned size - size of the XMS memory to alloc
Return Value: LPTR 100000L to the new block if sucessful
LPTR -1L if unsucessfull
Remarks:
*/
LPTR xms_alloc(unsigned size)
{
union REGS r;
if (!xms_addr)
xms_init();
if (handle)
xms_free(1);
r.h.ah=9;
r.x.dx=size;
xms_call(&r);
if (!r.x.ax)
return (LPTR)-1L;
handle=r.x.dx;
return (LPTR)0x100000L;
}