+ src = cmd & 0x07;
+ dst = (cmd >> 3) & 0x07;
+ misc = (cmd >> 6) & 0x03;
+ a1ctl = (cmd >> 8) & 0x7;
+ mode = (cmd >> 11) & 0x07;
+ ity = (cmd >> 14) & 0x0F;
+ zop = (cmd >> 18) & 0x07;
+ op = (cmd >> 21) & 0x0F;
+ ctrl = (cmd >> 25) & 0x3F;
+
+ a1_addr = REG(A1_BASE);
+ a2_addr = REG(A2_BASE);