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61 lines
1.6 KiB
Plaintext
61 lines
1.6 KiB
Plaintext
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; File: StartDisplayMgr.a
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;
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; Contains: This file checks to see if the Display Manager should be installed.
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;
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; Written by: Ian Hendry
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;
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; Copyright: © 1992-1993 by Apple Computer, Inc., all rights reserved.
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;
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; Change History (most recent first):
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;
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; <1> 3/25/93 IH first checked in
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; <1> 3/1/93 IH first checked in
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; 2/12/93 IH new today
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;
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; To Do:
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;
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INCLUDE 'Traps.a'
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INCLUDE 'SysEqu.a'
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StartDisplayManager PROC EXPORT
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Tst.b $172 ; mouse down?
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Bge.s @skipInstall ; If so then do not install
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Move.l #$A89F, D0 ;Unimplemented trap
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_GetTrapAddress
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Move.l A0, D1
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Move.l #$ABEB, D0 ; Display Manager trap
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_GetTrapAddress newTool ; see where trap is
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Cmp.l A0, D1
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Bne.s @skipInstall ; already installed us
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Sub.l #SysEnvRec.sysEnv1Size,SP ; Make room for mySysRec
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Move.l SP,A0 ; point to tempSysEnv record
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Clr.w SysEnvRec.systemVersion(A0) ; Default to failure
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Move.w #curSysEnvVers,D0 ; Get the current version
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_SysEnvirons
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; Result in D0
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Move.w SysEnvRec.systemVersion(A0), D1 ; Get system version in D0
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Add.l #SysEnvRec.sysEnv1Size, SP ; Get rid of tempSysEnv record
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Tst.w D0 ; Check _SysEnvirons error
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Bne.s @skipInstall ; If we got an error, then bail
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Cmp.w #$0710, D1 ; Check if we are 7.1.0 or greater
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Blt.s @skipInstall
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Move.b #1, 4(SP) ; tell LP loader to do it to us!
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Rts
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@skipInstall
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Move.b #0, 4(SP) ; tell LP loader NOT to load us!
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Rts
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ENDPROC
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END ; StartThreadMgr.a
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