Disassembling from _HWPriv
  No procedure name
            00051A5A   CMPI.B     #$02,CPUFlag                            | 0C38 0002 012F
            00051A60   BCS.S      *+$002E                    ; 00051A8E   | 652C
            00051A62   CMPI.W     #$000A,D0                               | 0C40 000A
            00051A66   BHI.S      *+$001A                    ; 00051A80   | 6218
            00051A68   LEA        -$0004(A7),A7                           | 4FEF FFFC
            00051A6C   MOVE.L     A0,-(A7)                                | 2F08
            00051A6E   MOVEA.L    $02B6,A0                                | 2078 02B6
            00051A72   MOVEA.L    $01B2(A0),A0                            | 2068 01B2
            00051A76   MOVE.L     $00(A0,D0.W*4),$0004(A7)                | 2F70 0400 0004
            00051A7C   MOVEA.L    (A7)+,A0                                | 205F
            00051A7E   RTS                                                | 4E75
 
            00051A80   JMP        _IOPInfoAccess+0788                     | 4EF9 4080 5448
            00051A86   MOVE.L     #$FFFFFE0A,D0                           | 203C FFFF FE0A
            00051A8C   RTS                                                | 4E75
 
            00051A8E   CMPI.W     #$0007,D0                               | 0C40 0007
            00051A92   BNE.S      *-$000C                    ; 00051A86   | 66F2
            00051A94   JMP        *-$00CC                    ; 000519C8   | 4EFA FF32
            00051A98   CMPI.B     #$04,CPUFlag                            | 0C38 0004 012F
            00051A9E   BGE.S      *+$0018                    ; 00051AB6   | 6C16
            00051AA0   MOVEC      CACR,D0                                 | 4E7A 0002
            00051AA4   BFEXTU     D0{$1F:$01},D1                          | E9C0 17C1
            00051AA8   BCLR       #$00,D0                                 | 0880 0000
            00051AAC   MOVE.L     A0,D2                                   | 2408
            00051AAE   BEQ.S      *+$0006                    ; 00051AB4   | 6704
            00051AB0   ORI.B      #$09,D0                                 | 0000 0009
            00051AB4   BRA.S      *+$0018                    ; 00051ACC   | 6016
            00051AB6   MOVEC      CACR,D0                                 | 4E7A 0002
            00051ABA   BFEXTU     D0{$10:$01},D1                          | E9C0 1401
            00051ABE   BCLR       #$0F,D0                                 | 0880 000F
            00051AC2   MOVE.L     A0,D2                                   | 2408
            00051AC4   BEQ.S      *+$0008                    ; 00051ACC   | 6706
            00051AC6   CPUSHA     IC                                      | F4B8
            00051AC8   BSET       #$0F,D0                                 | 08C0 000F
            00051ACC   MOVEA.L    D1,A0                                   | 2041
            00051ACE   MOVEC      D0,CACR                                 | 4E7B 0002
            00051AD2   MOVEQ      #$00,D0                                 | 7000
            00051AD4   RTS                                                | 4E75

; ------------------------------------------------------------------------------------
; Notes from Joaquin:
;   Line 00051A94 seems to jump into outer space (000519C8).  
;   I haven't disassembled around 000519C8.
;
;   I would be curious to see if _HWPriv is similiar on the Quadra 950.
; 
;   Macintosh IIfx (10/97)
; ------------------------------------------------------------------------------------