#include "x16.h"
#include "mem.h"

TEXT apm(SB), $0
       MOVL id+4(SP), BX
       CALL rmode16(SB)

       PUSHR(rBX)
       LWI(0x5300, rAX)
       BIOSCALL(0x15)
       POPR(rBX)
       JC noapm

       PUSHR(rBX)
       LWI(0x5304, rAX)
       BIOSCALL(0x15)
       POPR(rBX)
       CLC

       /* connect */
       LWI(0x5303, rAX)
       BIOSCALL(0x15)
       JC noapm

       OPSIZE; PUSHR(rSI)
       OPSIZE; PUSHR(rBX)
       PUSHR(rDI)
       PUSHR(rDX)
       PUSHR(rCX)
       PUSHR(rAX)

       LWI(CONFADDR, rDI)

       /*
        * write APM data.  first four bytes are APM\0.
        */
       LWI(0x5041, rAX)
       STOSW

       LWI(0x004d, rAX)
       STOSW

       LWI(8, rCX)
apmmove:
       POPR(rAX)
       STOSW
       LOOP apmmove

noapm:
       CALL16(pmode32(SB))
       RET

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