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Author Topic: How to detect CPU?  (Read 3294 times)

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Offline Piru

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Re: How to detect CPU?
« on: July 24, 2009, 10:20:31 PM »
Quote from: delshay;516752
i wonder if any program can detect my freescale MC68EC020AA25 located on my A1200 motherboard.
WhichAmiga can at least tell 68EC020 from full 68020.

Regarding WhichAmiga failing on certain configurations: It is a known feature. Unfortunately it's impossible to make such a hacky application work on every imaginable configuration.
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Offline Piru

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Re: How to detect CPU?
« Reply #1 on: July 24, 2009, 11:55:59 PM »
Quote from: Karlos;516759
If you need to differentiate between EC and non-EC versions, AttnFlags is no longer sufficient.

Incidentally, AFB_68060/AFF_68060 didn't seem to be #defined in any of my NDK versions.

68060 was never supported officially by commodore, so the define didn't make any C= NDK, either.

Basically phase5 (and Ralph Schmidt) defined all of that 68060 stuff. See here:

http://www.aminet.net/dev/misc/68060Guide.txt
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Offline Piru

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Re: How to detect CPU?
« Reply #2 on: July 26, 2009, 11:16:13 AM »
Quote from: x303;516874
Taken from RandyAGA.doc:

          LEA     $DFF000,A5
           MOVE.W  $7C(A5),D0      ; DeniseID or LisaID in AGA
           MOVEQ   #30,D2          ; Check 30 times ( prevents old denise random)
           ANDI.W  #%000000011111111,d0    ; low byte only
DENLOOP:
           MOVE.W  $7C(A5),D1      ; Denise ID (LisaID on AGA)
           ANDI.W  #%000000011111111,d1    ; low byte only
           CMP.B   d0,d1           ; same value?
           BNE.S   NOTAGA          ; Not the same value, then OCS Denise!
           DBRA    D2,DENLOOP      ; (THANX TO DDT/HBT FOR MULTICHECK HINT)
           ORI.B   #%11110000,D0   ; MASK AGA REVISION (will work on new aga)
           CMPI.B  #%11111000,D0   ; BIT 3=AGA (this bit will be=0 in AAA!)
           BNE.S   NOTAGA          ; IS THE AGA CHIPSET PRESENT?
           ST.B    AGA             ; Set the AGA flag that will be tested later
NOTAGA:                         ; NOT AGA, BUT IS POSSIBLE AN AAA MACHINE!!

You can find it here: http://aminet.net/docs/misc/RandyAGA.lha


That's a bit unreliable, it's better to check Agnus/Alice version.

Code: [Select]

        move.w  $DFF004,d0
        and.w   #$6F00,d0
        cmp.w   #$2200,d0
        beq.b  .aga
        cmp.w   #$2300,d0
 .aga:  seq.b   ISAGA

        ...
        ...

ISAGA:  dc.b    0
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