Hitachi SH7750 Programming Manual page 341

Operation
MOVBS4(long d, long n
{
long disp;
disp=(0x0000000F & (long)d);
Write_Byte(R[n]+disp,R[0]);
PC+=2;
}
MOVWS4(long d, long n)
{
long disp;
disp=(0x0000000F & (long)d);
Write_Word(R[n]+(disp<<1),R[0]);
PC+=2;
}
MOVLS4(long m, long d, long n) /* MOV.L Rm,@(disp,Rn) */
{
long disp;
disp=(0x0000000F & (long)d);
Write_Long(R[n]+(disp<<2),R[m]);
PC+=2;
}
MOVBL4(long m, long d)
{
long disp;
disp=(0x0000000F & (long)d);
R[0]=Read_Byte(R[m]+disp);
if ((R[0]&0x80)==0) R[0]&=0x000000FF;
else R[0]|=0xFFFFFF00;
PC+=2;
}
/* MOV.B R0,@(disp,Rn) */
/* MOV.W R0,@(disp,Rn) */
/* MOV.B @(disp,Rm),R0 */
Rev. 2.0, 03/99, page 327 of 396