[comp.binaries.mac] Macintosh Technical Notes - 129 _SysEnvirons: System 6.0 and Beyond

bytebug@dhw68k.cts.com (Roger L. Long) (04/04/89)

[Macintosh Technical Notes - 129 _SysEnvirons: System 6.0 and Beyond - 2/89]

This  Technical  Note  discusses  changes  and   enhancements   in   the
_SysEnvirons call in System Software 6.0 and later.

Changes since October  1988:   Added  a  machineType  constant  for  the
Macintosh SE/30.

---
(This file must be converted with BinHex 4.0)

:#941-6)j,R0TG!"6593K8dP8)3#3"!m6!*!%"1&6593K!!%!!!m6FNaKG3%!N!J
#%e41,M%b15jI8hPc4@jfDA*[ER24'%#"d5J!N!-$!"iB2J!#a)`!(DJJ!!868J!
H%N`$6!%!!#`!!3#3!afS1PG28N40380"!!#J(*lpS"bip!#3"KHH!*!'$Sd!!**
f!*!'4`S!$!"i!5!!!!)!%[ll"q!I[i)*,eJ"J)4L3JY#!#$3Q,"M`J%G+eEX+%#
E!"6r`[d6*b#I!#-$MK4!-H#KJ*!!&NQD4!%a)CQ1"J-)"AVL!85$(T15"*!!)3#
NT%#85TfU&#3-!&D96J!")#U!#!S!8+!B30NrH3$SR3dJc&mBK3dA-N6D8fN%*`!
J*"5!$S#!X`"-!&BVMkeEMh)CZZLi@#S&-`,J*C`!*S!"`),4%QD,'!#$K'2pFKK
J%)Dm(c(Q[FJa$p5$,r9qj(P8j)FG1P-Hk3!31iqJ$fdHf*!!p`k'J4`2K(c)-q9
6JLi2C#38###X@!!jp(e*3'r5S8J2QV#C8f+42'$ebVbUBbrD!b[b[X8i6kq'2@p
LrSM4)qFH*(Tre*'("R0J!!md!%L3!0"Re`R!`%eM5F$J@#%N8)BEGNa4a!``J0!
$#$FN)1)H6B3a4KTZd2('('L!S1%,(2E4`(3,AJ4!#IA3)8F)-0Mc3Klc[-,G+IC
!3`mCF@Jb4L42F'H0Ir0m`0SM0aa)SfHJ!E$##$()N!#$$JPm-88HFa5"B4Tb[1(
'($U!i#+CG*64"JJfZ0"K''k3!!'#%'ANS5BC$A!38%)5'$4@!!f%4CeeBiRaaD1
3!%BUkD589QVTTCKQUQQNEXkiD*B6d20'(8,%!N3p)836"!mIk'$PS*iCfK&e%pj
8d)b`6YK4)k!!--KF$H54DjD1EQVXXFJQZfQRX$*kkj@k*S3SY&NQ%)!j!9J(3!)
!a!#!&J!)!S!T!$`$`$d"J"!!%J(%%8!Q!TJ3,`!l5&''(@R-8BDHBZ3"jK&eT-%
''fA)dFBE)$`K"aeTk!'##5!3%BBGCB!J44KNM-&''QDB88B#4T3KKKaeK#&((L$
%N!!$$MRJ5QZ@3e`lJ,EF$[&YZ11@HfkkklElEVccEL#cVGZ5j3R3*P!eeE6$ALH
Ybc9HCkdjT(A%V5P)ckZd8R*3J8Dq)&"4aKKSZ*(''''`!B)6Em3*!KRjMP(((2V
1!3,CH*j4KYeikRNK'RL1)HH&G0L0)JKdS&'aQ'5DL@qDDpkGYYU(McP(R(01mBB
CG0aKFX9ehTNR#'b%%DFF,XbS)*EAqF#J"3!SSHX83`$ZKYjfci'Li!Q2SD)B"DH
m-JjYJK!%'@6X#d)B),4KiYGZP%&&(R"82)DDPq0*"`KQ[#%(iSU$81+*+DlBiSX
FTXi3"J[+ZS'Z*E`1!!bk6MfceGhH,#kjjU+V,V[ZJTHmNTD3!)d)B3#5D8!6JR#
%*!`"#Jk-3!$qBBRV))SK,lZ1"aKATM0"MQqMFd)ClL#qjk&SEjj+L!0NGF'Q88!
!PZ#Jip#%24#!,A%9bekH6+BRck&-4@mV`qRDF%,`9FaMTUZ$(2Df2$Z%3@"K%!2
"3+#QjB(J$'QJQ"ZDCm,SX@"jSdY$iEKi1,c*`85RbaI$aQ"$ZbA1G$EFh[95K++
5$3aPphS$'bMQ4S6")8hi5Ti434!p`G(0C#K$8IF-CVSd9$%-GSXH#Ce(YK1#8%q
@`jb,0YHjcbd2$Y8cQ3[F&!5lH5m0@(6$j&!f4m&PF9pIP+%(DhL(8E&"6f3EfaS
'56%jk%j0pST$(IB@*ch"`@4KD)-3J`I%j!faL(F!h2B)4M'eEFk'EPLNmaK@46r
9!34h+&M&rPL'Bbj46d#d(4N)pN8ae'&lLE[Kf-U@"Q&@6*PiXPXGi%#'4Yi1",*
mA!dA#B*l&3aPNJ3"i14!"XmY%34rI!-CkZ!lii&bLK'GU#&(#B)VL2&mF*,6*MR
R80$C+CD@Qq%(XDNML9*8H4F5k*UX8,"IEP%'L2-M)0-J5%9kEjZ1h')84l@pK#k
dSCk%*$JVKU+@DT5TG0J"q-#@d&lD&!4,T)-5)iG$%-`KQ49,+BEXa8DP@M@S+8X
G!+J30GJa3&IrH&d!&M#K!("!VLbSDbINQSUkdZ0e0kR9@bmLJ2H"4J"q!1`KG-@
d$,l`"Ra+TGRqHBH2[ZPb)Y8F56dC1KI%i)Y"Z'M&e-3'P#f4B*!!C#,cUPT6Y&i
cS$5-A$3[90$ERE"J+$S$&pGJ2G[K,UGac*f1++V9Kk)J$5iSJ`Zq10XYiK"P'00
63Xf3!)Bbh,+2Ph8F@9-JeFN9&!pUc#d)cNT,JDNYUeYGhKMNGNDhqC54h"5U')J
k5%T#Vf)aMDdb8e43,GV3$"!efIDZqFEY[4HS9I4F*0Y'46QJ%N@V$#*eSkFRJRD
9[&[d*PE,B-r,FG3)h[YZ-Z(!c[q#3-0S'aK!a5T6Ze8fFH0Y,6!j2%c-kZP$-D#
L8%Y)2K@a#!4*5!)H[LK'F*Th`mAGXAe21,hU84(!-4eIN!$ad&rD*Qj8CfK421f
fj1JKMRUMGA!U)kaJ3M)iH40@(N%aR,)R$c,&E&!V!2$#ZV%X3AjAd*8Uj$H,ZLE
f)J&34&dK)9G5e&8CFUe'AE-K9h%`&QTe&J!(XM!UVk,"PRUD@mABM02AXMLfqU5
MfN*,iSUGYJbTj4XK4aJm$(28AQIJ)F(SjZB,bhL,QLE$&bmGcPjqdC[IQ`-R5fT
T6)-!H""GSMQ9Pmkq6E%1dF0$pAbR2#HbSFCJe"1,M1d'"MZ2YmZM@ahD!)IimQf
qlq3HY(dAe,5*%@9L5+fHUXMH*I+h$0)H'adDLEd2KaMI)biaadimUQ!2fj2e*Pa
T0ba-0+Q@adde(j!!Nr$&1&e1[!6YX[6!$!)II#M+*JSb&dflYcU``F!C,VKA$rj
3(H9"[%!Nf4BIbF9+HMQDCfY4C9AFlHh0BCp`m"im`iI%iM+ab%YXq",Rm%9K)ik
Bh![a(+E0XE1Tf`hX9T1lkB#bibChZ3U&T"'J8)9G3h))H[4H&)M`45'1`38T8+X
0SMD@ZpS)"AA0-k$G8+X!!2B!Y8S!B#I`D'U**3!$S23hYfeb2DA0KhE,j4KffGA
mIT!!TVj%Dh14[&@-TfP1X&fTlV"HXDkHiGS9Hh`Bb-4j1841U@fJD)X1c'qKfLh
SG%Z$&-[!A-YD(RZB[bU+i)BfK[fcUer,-Y6C2,%RPQlhEII[`,X+jpDrISXaRB*
eUI#'0`J"P5"!!64U8!-Bb#!&"C9$QP#(UlRA'3"f"`$X9U!V)-L2#EU+K2a!SDY
cb'mHKHG#cb+!pN-cq3-Zqk-crY-c!B3d!,!!m1!*44!-L%!&9N)VKL*"&!3!$L"
#*)4fDl*[+6)(+F5",!4TZR)0AR0%HX3'Ee"Crq4*#49k064(1M4'IE-m$p9cEr-
'FV0IaB403,BQ2&8aia0a,#*9['C3F["VPFCiYl4K([-p3*3%4#K)4eJq,2*&9U"
(ieBa9["&D%GZM53'![0Z)!!`4EJad@-h+!"+Se3$d)!$,"!$Rp8P+I"&&KBq5cG
J!0C9Pq-pH5"R+N"hmLFr)U!V4r!Jek&hef%(M$J@KK#!MJ8!$C!!!"VAC'@!JV)
#!KD#)9)QC"i#!M8`)PRSBbdbC6,50,!M0&4MJ"Y`J$M$2c[c2qhLJ"N%1`+3!!!
P'#d&-9KqpaR"k"J!-!+ID!FfJ!-``#'M5!1Q1!6*Z)`G%P''*'abX)UXQ"3b%!P
B-!)*`Jd!)!+cBSM&SLcQH)lSL#R-mLP18c48F#d"F"-(!!$cZ!8"N!!1%Y3VJY!
VM"!+!&"""P!!*!%$rUJ*'[%2p0!4'T!!%,f##3B4&[0BMrF)%K3`)c$!%cB3!,)
3!2$3+jR3+jI!Mri)N!!#Z4F%#3!'Z4(8!3"4`*!!!)!*-i)"2#%S$U!!TfJq$H#
4"AQ3!1l3%5d*!!fT!KM`!'*$0QD6BQ[60R[MN5!jNJ&4NRjaNLRT%"h""Li*N`Q
b![(`!4Y!"!EPJYAc289*6dJj"8!RG%`*!*F`McFK!&cK!dAM!`'3!!fp`LX!B*H
rXLd"`!p9Na"6Xc@!D6pdB5h8i)#!U63bi!P3i)d5i!rKf"%-!J!bX!Rm`"8#S!3
!`!E#B"#Im4Nbd!Nmi)d#!*F-X*PB`MkI53-V8""AJ31Qk4($+#d6-!'r'*R$H*Z
$Y4F0))`0J#ZeqCZhq3"'-B`'X*X03!J--#2$H!!0)!J-)!M0#Bb$9Cc2DCbr+3!
0-!M!QCY!)Cbr13#lkCcE+Bc55ClQ1Ckr+5hPLCk(fClZqCl`UBfHJ!JKJ"AL)Si
0`3SGmCNS!!CI)3hC!TPV*CQGJ!2e'4QH-3adiCq*53EH1!$Um*L6!3!-fJN`)*S
EB32&%&J!-!H5'3R-m+"fN!#JG2%("!S#hNJ!Ri'I@'+LL3N-$dS+!'!%#SSPLd#
J$,#D!D!0!1!#0ISCPr#KS*!!SMa!SKda#T,T#Cb3!+)9`D)C!!")qTNXN!#LDJ!
!L&!e-m),"%S%+BS@F!!5(C%-"-S"hPJ!BL#K@#+Q-K!+h-!9%@!'Q@QDRe%0")S
%SJQ1$2#M!"!1"-S%CFS*4QS8l8#JL`N!"B!+!)!#a-#K$r'C9&#Q#*+R"Q%'!E!
4RpQ0KXS0!Z!19F-!!H!'"-S&hSJ!bQ#N@"!!HN#JB$#UeL!!LY#T!5!0"1UJ$qL
INJS!5a!!hN#JD1#0#m!'!Q!&R5S!+8#JE1#0$5!-4RS#!P!$"!S(b1S-!H!$`mS
&"%S(h[J!RIQM!S!'")S(fFSqYqSAG%#J'*!!V53JSIrJ#`*3VSQ*#@9+#2,A%8C
4%*r*"pPUV4L`U&Mb!!(`QB#3!+hPHUXP!!"#mjQ%N!#YJ'!CB2SC32#[RB!)hJJ
"KQ#NRm%%%-X)%bX*!)!"`m#KTrUCN!!`XDS!!#S3-eK#"K",#GiB!+i!!#b!XTm
""a!,VhRKQ,Ik'A`!XCb`QJpJ"!RbX9L##"!lT&r"&5iJX`"!#4",#LQk'$N,P"#
,#JrUVH-+!+`!X3J`XG5!TTq4YC0*$jEj%*V*Q3#!#a!,"+XT!,B!!"SJY*p"$"!
,#cVUV64D)p!!XE3JQJLL!$9D%)9i*3)3S9Fb!1@k&`P"!,Z"Z)CUN!#-#`(fd"%
Em48HX"4Ii3@5'a&(J`aIS!6)D`!!!:
---

bytebug@dhw68k.cts.com (Roger L. Long) (05/01/89)

[Macintosh Technical Notes - 129 _SysEnvirons: System 6.0 and Beyond - 4/89]

This  Technical  Note  discusses  changes  and   enhancements   in   the
_SysEnvirons call in System Software 6.0 and later.

Changes since February 1989:   Added  a  machineType  constant  for  the
Macintosh IIcx.

---
(This file must be converted with BinHex 4.0)

:#941-6)j,R0TG!"6593K8dP8)3#3"!pM!*!%'@G6593K!!%!!!pMFNaKG3%!N!J
#%e41,M%b15jI8hPc4@jfDA*[ER-!#J!*KeS!N!-$!!Q0cJ!!rcB!#4fZ!!0Fk!!
*KeS$@J%%!#!!!3#3!`NGb&G28N40380"!3#J@X3aS&dEK!#3"KGm!*!'$Yd!!-c
Q!*!'c+B!$!#)!5!!!!)!%[jEq)pI`B3AZ!!!-6%C!!Zb!#$3Q,"M`J%GN3!3f9'
!0J%SrSAl*dj!2J&'"K`TJ'+!3`%K4hSdLI*K3M)G$3BB'[6%JiF'25SY#5"$!%K
+J5bG5R8T5"B!VJC0+)%F!+N!*%!$3!%!KJ#irXN$3%pY!'(q6#KNZ0#RA3"e!8`
J!3"#`J+1!!K3#m!%iEEbhXEY52FIJ!iG)AY-5S(*!,pkD36!30M`@X4[26UQQe!
!K`%'BFMl%@2HLacc3$hi8Zp(RNG&IYLK-q@4$J#em`Mkd1D"$AR[B"M)m8$)Kca
62LASmN"'3S%!&#3X1iAHMM(fiJ!ka!-#[6$f50bcmL62JpDIF-clp*YHKNL3!-$
BXlCXcJFUphJ#36%iQ#"$!e3)%-X$6E!a4`Q,2*!!"$fFh21)#r#-C9C#$"K8&JF
-E&GBL"F04'*C)L43KKYff)!$$$2!!%)2)0#3!-!H63cK)S`b`L(('f18-FFFEmM
44`-"FCL3!!8!I+!LLe-8%H1-)0a`Ba0KM*'''h5m-3FD)%6j3Sa()SNGL8cQS-m
A#G!cb5'4-1JJK2)!8dmCVp4K6c32@#(20c(858m0pRJMaKpLk#((2C!!d20((AP
S-!F''BDP*&Q#-B"6@4+Ff0'Cfi'58!K2fS(P'%NN-3BH90T`CCCEG[NP#+QZ@QD
5!+"C8!-'BDFGTPjm)Hb`a"CVl,()*U[XXX`f+kbC#IeD9JRed#&(#$$Bmd)Hmlc
5jLRf3%-2'A&S-NBN6l4T$D2cI!$E)cG8LUZR,363$8JGE5$!!I[fbqqrrJEm,`"
21'[``3JIh!#dZBVSj)UQCTNUUc6@m+U@A(S*jX5hJPTL!,c1+f,"#CGXXXN05#)
bTL$ljA&CFY5c""i28-(",(bSmB!68N"`#52hB"%))-Z!*piBN!"-B!X2a%f!`J%
`V!""2Ip-F3mQp&Kp4K%i-+!'+(-mB$8Q)B4E6`h5h'0(%-BKTe`1#SK"!A*)5R"
T@6lSUS5R1036`MeR"!+*YYakkfJGHS6b4"Y3d%22#IH!)JmBp"Ka6aJ25*''-Re
%!mmR3C!!SmGlmmRh#F1HVM"#$$,NS%-#Adb4aaa&X*M'Mfl-S3-)BFj14aPYJ'#
$#c+'i3BC)!K44Kj[()mNVK*i#)!$p)4c$ab$&LM$)mpMji$d#GLE9%)*#'`q`1M
[#m!2pZ*,r[R`Thr!VYIGrDRp)$[f-J!Ha$jllADiAI2Q!!,M)Fm*CEJ$#%k&KLd
*L@(IBeN$p(Fh!B6#Il5c(Hi)Q!B#dJ%0C3$"(1KJ`$$)!APh#%-H30!P%*!!S3b
rNd-E(-K#%),!$'8)!ahU)!FK&G!1B8J$'m)J"MD%X(N&"-%CdQ#(&B'J$9PUS"[
+`))#(Jm%DD!$!D'i*4#-!3dQc&)-1dL(0)`"Lai%)af`Z-Ba0+q-EUK$'0M!KK@
@`3j[B%-62IJ'%2MS$3&mB3e$1-8J$FQ%+pb5'BS%a6)L-3`%R+)#SIK&"a,3J,d
E)I$#p!Bcd#'&25`J(1#3!%-jZ)"h35"JNG+`4$I-XBjHE&k3!*KB"M*8%B-!&'$
Z3(#(0p5"$FMlBKR'X)C"JU#*FTK$'TSRK6,%S3j#qKhbi"$'0X#`$(*JB4pI'--
C6T'ADJ5"%C[)"K"d%SYZ@+3-GEK-0i#!HAAJ*6C$k+-b8,1(b'XK')pRa#U+S3j
Vr'!(@6K-0,JK$Fm-S6@04m!k`)%-l(6$'8#!5`d1m)C&!X%GXEP#5B)!M#F%*6e
r4)BkM''034LP%Ie)8T-+kC3JZ%)@`53l63C[#ThmT!P$1$`Bh,+QZG`J1UheKT)
'#AR)9#B5C@"1-fM8SVQc!MD9kXi@rM'3!#&8*#2Cq8Jaq(+0(J8T'84D3!,H)DY
FDQQ3!0LiJaS1e+0*E5F)HVK$1HcbJb'F3aLXQ8N!0[1-N!!mjP6P'J-A2)m+Pf)
5!cce$c3&B!%R#J#)PK3!&N5f%ij04@6TJ5DFR%J!'HJX#MkEL-j+`P-JUer$b#+
!'bL[P3H9+#pRQXRIh65RC1fT#f*3aC6#BDA0Jf82M3K*(iB""(!G,",2@G%!#[8
1)(6RLPTC"QaZDD*3A%-)[fLm-rL`K9NNi!MPB0+kKK!&DA""'9a34HJk%DmV$!-
CN!$R861NS3c!j'0I@I6A&,6eP4V&!aQ[+pKNYY1X3L`RAARScLb0JBFk4+Xk'bP
A)Rl9Q*58BJJKTNYVFNQM6A4R'Takcc@Hmi-k41H%ZHV1&%Eb$5D@!bZhp-S9[Y#
q8d5H1SdC9b6#Fkl1K1B)B@U%M*B"$h[p,4@ak03IM`(!cG8PJMpBB+Sf-k'D4"k
0BQ$1"Lm39KQEeF5UQ-ACdK()GI9bKKe)K6b3!,+T6idBUT,!USe@&3fq2!1B",V
&+0+3!!jZ2U+-@ePMAJE@$6"fB4P`A%Z-CV2(lZ6bL@hiC$SD0L&1X0m5G(8&6kP
#9l1)V"mFUiM)3X+aT)LX-KaEMFKQ`l(L3'hh+XL",2K5K(Mq*I,U-)F33KS%6'8
Z8+(D8#i*%35qAHP`FpMV5b)hJGLXFMYKfX`cQ*!!$%BF%Tca+QdNmVU@9F6c@C&
C4AKQNdLH*1ZAI!P-%)KKT2EFD6llZ%pXKl!18m3$+8rDD##b3FK@40kkGBhF4'F
hK*!!R%-GfJ!(4ql5`J#p)Ej2fXijCR'&BLJZmT!!q'!jp2$$4pih#4dq"b)E'FN
-lbH6hqR,Fq0fTelNiFIT)0`JhmkiAmDBV$D@K#VqES3%h['DTpMQ0rZ!4K!l9DU
HU%)J+j`0DqbLZ8AimP"D+`m%EL&jhIP)TPIbQp!e)jMZN!$JJUp4iD-X8N"YL%-
GmY#(CHlK-fmqKbS5LD!MG,3)pceL-dVF$44[RX8"$3,dUTHp(i@N%D"3KA"$FJK
j,&)8L&"&')l""5QiY!hX0pN5MABl!HJdCGh`f3"dpJ#I68"R*b"Ve8Cf!,D1jm$
E2FF8cXk,)#5Q-6Qm3DND')RZGHH#l4Vd(`8[bN*9*Z"$b1dcr"[KE,!p!BIrm#f
D&%aDADI$bqT(,bQcL%XQ1j9j2d$I8a@GC$"M4#I+l3EU1CVGEM!3K8K%PGYjjGb
ZY)*Kb1",5KG+q%8&Er!'3X"+K3F009!$-#!$+D"4(PFNP`B!QlGD(k)V+q!T3+!
V61!TND!VS1!Tjk!Vmp"k+e-@8G!qia-qM"!r,$JrH'%0!"!%!q!,!0!!64!%4j!
!"%-!"6SB!3(J'246JN'i2b$6+rJcDa3)!-Y!"@bA4fc`"Q3R@c$R8FKh8@k81b6
%*@E93&p83+'%D'Y%"N#bF#XL6HK%+lQ6"S*d+V'L-@dPEKXP"q9fDl1(2$f%3pR
83NQ3!)CV#'Bl9d9@N!"(C!J#9Y!#[!8#N!$(F1`N"N*dF5"`"(@JK[KP59@dBpc
@3hNhDAR9*A+3!!F4U!,fB`'k)J+HNJ5DJLPCi#PiF)TPJ3JNZ$m0N!!!3eF'49F
'50JKQ")qpq)4j5-r,HJ[!+#,lK1-[qL,!b1-1%%q!-!AY&#-!U-Ap1",3K!,31!
hd4!%6+-$mR)QdL-!#B!k)V)!#I"(KN3NFR#,i0-q[1L-aML%4qKk)M)r#3!!@b!
q1$%rme12kH#$SL))SX))S3!!PK!3"9!5-"#3!*UJ%Ip!$afK!3NK+TKJ%0U"Mr3
B!1N!%K5!*$#!!K)B!,)3!2!J+TNJ+TI`M`%jN!!'8*!!TA'3!!#3!*!!'i%G!"!
&$`N!Q)!N'-#4($!p#X#'BBB'$5#5#+Q3!1l3%6)*!"#T!KK3-`9e8*8'!Ni!Bd)
LNL4jNJ4TN!""L3!0d4&X-*-e'4BV%!mIX!&%X&&25%VC4!9,UAlP0!81"3GU*j8
!F!RcJa-#3"%q%)`!i!-"N!!0SY))I5NUJq!BiF-2U0%4i@-19C'B[)L#K[N@!Q!
#MkQBL@Pk)8+C"E&BLRN$*S!&)a!@VJ!!)Y!4*!)!0k!#M%!4!N!+!)!'LQ!3)4)
L0h!#3)#DQ*!!+khC-"K!QKZ!#5Y3%$!!!$K`Qaj4QRc3Q4,!#+!j&CBC!"-`!3A
4R*GCQCLjR01*Q3,3!#&bRC@j-0(CRG4CQ3p`&*C*!0MC!)E3R3I3!),!!)+JRY8
C)JD!RHh*!%KLQGFj#0ijRH&C%2YTQ3-JRp)CS2NTS0mjS!DD%!@+S1mTQ3cDS!l
kS!ak!bc!"L%!!!9`Pk'*&kc3%4*+""34!B)3!!U`#+i*!)J9Qa43S3m!"lP#SKd
""U6*!9"!%38!Sb,3#$MKR$"k!c0!"*e*!'YK!cMD-(0!QKcCQ3q!"5dk2Rp!QLH
`4J$`!"3K!LiD)Nek!aX!$Ee*!,B!!$a3T3#`#+6*!X$3Q`-3)Li!TTF`TLc3Q38
J#%[D%D1JQkc5&kB!QLkD!3!`Ta*+"4a*!&)!!'43Q%M##c(+"K`C!'J!!&b!,b&
L%4,+"Cdj!1`!!&VJSJP4$D6T!6K!%4#!$(KDSTSUS@$`SdB3Tb%5$Q0DR"CDQ`c
JSNI4$Nl+#@kUQLL`JJhM%",+$Ql+$(&k"J'`%9J+$fk+$3+J$iAC)@p!QLR!#Tf
*!0)3TeJ3!([JT!M`V0iJ!)U3!+`"-!fND3+d#J!,X+L[DK",%!$I3*SAf*N,3!F
#B!A*+J#JH!-Vi+-eU!aaHJ)#X(Nh`!(ffJ$@%!!q%+pG`+c3J+4P8Dkj)J"Ti+3
`J+4!8Dlrm!X#8!GMLJ88d4`AJDY(84#aL3Hp54-EkeP4'J#P53")bJGa@J)!X!%
QQ`*-J+5)!!$)kK&!B,)VJ!5HUJkKfM!hfkm--+RJJ+S!`!3QZ`(Nd*N3%"JBX!J
N1kdhN!!#q$#TADS#-e#LC'#b*X!0R5N!@mN#9pX`F+#eK0#C)!N!9PZLI2#bH0#
C%5!A#KXLL2#bR!N!%@!G&Z#d$8-*1!X%CNX-!!#f*3S+*SX#G4X"DN#dV)#c2+#
dF+U`#B%,*UX#`2#K)N'P*#ZjTBQSGKXL'U#h)8)-*XX#6%!4!b!4PcSqd'#b*d!
&T[XE'GS`UaZED0#E!Z#3!%BJTJh$$5E,!C!!d,8`1U**%3#JU&S&!"8*X4&fD`H
L#4&m)!"CX!h%!$TV!!!:
---

bytebug@dhw68k.cts.com (Roger L. Long) (10/19/89)

[10/89 Macintosh Technical Notes - 129 _SysEnvirons: System 6.0 and Beyond]

Revised by:	Guillermo Ortiz & Dave Radcliffe	    October 1989
Written by:	Jim Friedlander					May 1987

This  Technical  Note  discusses  changes  and   enhancements   in   the
_SysEnvirons call in System Software 6.0 and later.

Changes since April 1989:  Added machineType constants for the Macintosh
Portable  and  IIci.  Also added keyBoardType constants for the Portable
and ISO keyboards.

---
(This file must be converted with BinHex 4.0)

:#941-6)j,R0TG!"6593K8dP8)3#3""$U!*!%6%a6593K!!%!!"$UFNaKG3%!N!J
#%e41,M%b15jI8hPc4@jfDA*[ER-i13"-[53!2J!$!*!$2XlB!!%!4$I#!%&Hh!"
%S@i$EJ%)!#8!!3#3!d3hh&G28N40380"!3#J#c`cS98eE!#3"KRq!*!'%'3!!#Z
@!*!'&dd!$!$!!5!!!!)!%[jEq)pI`B3CE!&!-K'LX)T)NJ(!`!X!'J!$%Q)8#8#
!0J%SrSAl*dj!2J&'"K`TJ'+!3`%L+9)8D4,P`i4N4"S-3&6SL3F2$CDKa3G!Q9S
)!)d3U3"!KJ#3!%J#!++9T-'ZB%@'M!%5!0Q%AbRSfTU3!!*"#KX$l2SR$`!mZJ'
%rG-RNZ(#Ri!"r!9!J3N!#'M&P+3,`!4MHRMemPASYb42V9mYf"J!U+fq!$`B1ki
,@9jHN[m%-d`SJ-1!S3d-#J6!S#f!#I6He"%5#dLp%0'#m2LJ!akdK,-C')3E)(E
!K,8*Li`KldH-H5pbc!2ei%Zp(hNH&IPKKmk84cS!I-mMk%1E"cEN[B0K)-F$)4r
b62Q8S!#dH5!m"d"9dZ@JcaF*d$2*)C%md!3EFj5`L$c!e&2'+hAB%md$9XMc$AA
!d&1$2Gk)mBFBHXKa$b6dr&&((KV-JB&a!%J!R@d#-)!6A"*%"eGbbiQ8R'fMd,2
$'2E%!FJK2%"!M`G(J$,2"pSpSKeh3@55`30YX(&,$28mN8Fi$%`Kb"JS0%#&!,%
i#+'%$d""K3RfU!$"'#aqNX3amS$c3"#S3*&'**!!f"2,2Cm)B885BBjCjTPTVYQ
QR(6DL5FpRda"$cb')LV'SSqi3#-*d!@CJBm!K"#G"3#`J#SDU`*!"kSPe%1((#(
!B-m,HFcc5S+Rf!-02@6%SFNBN6b4S$8V6PRP$63+L'Tcb0dSAE@dYC8*+!!N%%!
hAb@8J!!QN!"VEVRSRUXZZJ$mm'e))SelJ!$cTQ[[ZZF#%-@liAV,#,d!faZ@9LZ
-%)--1HL3!-!A8q3a4a&Zf*''('qi-BF1))$3m"adP0%'#$Di!!-)BEK""JK#P*&
(a@3di)5!%J4*VE5fHGX0[1,LDm,!2#HNJa4P5$a('5H,NBI#4p54"KYXP#&('fq
!m)3FG+5K"`JQJ%"%'(D8!B)8BC!!-3BEDCKK4KN*2$%'(@q)i63)-H5!3`i0d#c
G!["i8N3`L&"")j!!er+830e$5QFccYd#A#qj2AFeFq&`S9@hhF`j0aZ"&"b4a""
3E"j"!2pB8Y,JP!-J"a9ST$%(#&58-3BDEU3a4KKXJ1$%'af$3)EUBp3aap#V[el
b'@@XA[,*CEL"4XPMH*`m(DZRi3B)G+$K0F-13b`aa4D$-$[6)%L[XF-GIcc&'fE
3F8FBFRJGmXM(Jm"''"h,i8,G0QBVR3qa+S&U!r$i4*Hqe+K`r+e8JDY"!T*RKb,
JJ3j*Q-)6JN!%)5a"$#IV!3KbN!#!233"$R"S'JJFf$'6%3d%5e#C'0l![T1K))*
25%%I'N!iDl'+0N(b&MpH%km!Q+0a26YF[r+L1#"f4B%-R!)Gb!"$#PS3Jb$3)!i
kq-%3HNf*afXK#PA)3MQi%)BbT+(G@1@!"+a"C8,S)KQSN!!(1*5KKML8cZ1X96R
Cd"%!(X$H`b)fXBSCcf5f+m-G30#%-,a1HX@$S`0NeS$83%i!SG#Mp[VB2G94chS
Ji&J@[3L#pH@"HP%M3aRUe`C%AY*VCk0I(GTR2$Z%B@PK%)-)+dBb%*`K$9fEAKX
-Q6ShP)%&*!0N'U!(JPf+6hKb-'6p9&He-B4[GG@MArMSi,f+9Fd0GD!G'ciCY$H
`S@[3M"SF+#Ba8Ci5",jXhZrBpdRTQH%06k0I'QJCKYAjFT!!ZcbN,rpiXSf96f2
S8arl["B'%*D"I5l)@""@"mmdh0)0f[cN'#V@2&`5$CL5j#2h9RF(hE$KC+pch4V
1f68jc''HEJ"D(1T3[)kG$!lX#d-E4[NfYZQ1TNmcj4f@4mfQGDefk!ZI'piCckV
4FQ9ek+66[$E1-X#dI5HckI*-eM4JLU%1e+bH*6[fZYLYe'Xc,GRUkJ!(-XM6$@F
!38DhjdF3%"8%3A2D*qm*JZ9jFAhY!m%ihd#'1U`0"&88i9llUXk%JZ!+`d6$q$M
Q-B#Q$krZ%aP'0cE*M3Ve9Rcek`P,HP*DbJ!%3@8J*HGJ"DGeGRSfh@Xj[HC1H1l
5U01,T@kS59HlNJ'b*1-SDpf!@F+bPJilZ+3PkFTCP)+JIA4BCIHUjl8jb25+fBX
Bd*aC6a!8PjBaZ&p#U'"$fU$U(kX+`!*m&!!1K0G9E3P!*m+E#[,5Be8imC%!6T8
3#k"%[SQ!Vb5Q0EP(hL"P$idG@MZCf-Aqmhb2(5M)41D#'!!cX&kVf$D2@iDQeE0
iY55ZDBdEe,@1YT2@Qelb(PS'TdN[VEXmSrHQ5Va`6R0e(*1$Aj1E9a5N`39PF!%
`GjUm8hibE#HMUaR58'%bZ*LbdR9G#S+V6EMLJCNRYZk'fhU(TG81ZFSPf4KkPmc
FYEDSaT8Y9XqCcejk6E6FQbP[iCV,m*P"VqbMCP#M5Fd[[pDikl-RlN!V"iG+,k)
h(E)[6rC@jNVCT-C&+S@rbM($'J'H6TDT&B&C0K!SqRZeml"PUebp3jp@T5aPE!E
K"YVB%Y+3!0*Mfa`8Qi3Ni)(5e+`bq,!X"e1A'C&XG#0Shmc!3SkKeAKJFiqVTjX
c+&DVUlZe,kRAaJMhqD'!cM-kpba+3Cr`VGHGAJafI8j-DaF!,p-IA*B3UbZJ5K@
aQJ9jr4"H4C!!&a,K*39jP4(HDT!!0a[K&3GrX59I$Q4"0jP%JdG2jMZ[C4X%Rqd
`NYRD[6V`GQQ!"D%)ffGKi'9BN!"[blCKJAD'&MEYGp`fp-%,6JCJ#[`1FC8$-*%
UKd`'&,HV(MJ)h+EApMheK&)pRJJGAJBmZ(&YQk9GU)0jXTMAiD26TQD+#IUl1V3
"$V!ehJV(E!D(V`fPY"[Q*m9`iC24NX[Y@h22Idi(HIV4dC!!lVQNUqTQ5qZQjA0
iZB,"rV`*YfqP%m0`'%ipKP5rBG8JD$8`1mDa+,p9f@A)YGGmS-&H'l,9a3c$*eP
jp$T2Mq8Z6h"HEj@(+0Y8aY1MCq6ekE@GbNkaXUkG'rBm"l,#!CjCa@3UDBcKB5j
DDD`%CYbTee+h3RS12bqEl0aUGGKQR3kIY$'1G9cAHKS"#P8`H6f(i%ei4S%)`"c
P'&b3!!,YfZ#1jUd[!&"!AR2A0`"ZN!"[!1"l!2NQ!,i6f$IP!M#!IbI9k%LRR5H
$CldaM063D1C(TB9SY-4Mdd0V!TC@CN!a(k0TEA95EY!mjh3'E-"5*--'qdGK00B
peG8'IU9BGQCfXE8kVrFlD5",[d4JR4D!&M1!Tb98Zc-lej4@KTBkaYCl"mFeVc3
r+*KpE9CTKSCT'UKFI`4A%6-&&8B&Er!'3Z"3))!#d&!$03!$-T!!!R!P"a4M2j2
cIH)'!1%(!+bb!UJ#",(#"+J5#E%##UKb$V%b$r)(13$J"9m`Kh4BKhCiKhLBKhU
iKhcBKhiiKh#%13#`$+L$5Yl%"Qp3C31QB(6PJ0dc84C6GVc&8DRc1L569kY(6@6
`"VfMCLiP9)&R-@PJ6VlQGkX@A#HAFLX(F2Kh-Zec0LeR8dNJLU5)DVceGfJ!6&E
J68lR09E3!Ji'!Y6hG2)N"NZMG5#3!$5M@'')0!I!9'LBa%TbpQD'aM(`P!IITJ*
hC!'a)J+SNJ3k)KeCJ#Ti%)j`J3LS!J-,&$&3!(Y09%%A0'Shd%(Y5$@a*%)TP!F
VT%8[*%&K0%B!F!,VD!Ie5!G1&)p4"$,d#([hk$AjZ)pH0%0`e)d$D3-i!!-c-$)
D4!-Ge!4$B*%B16*lT8ja*`Fc"*!!)3!2N8!Hp'!0cj!!"26!#A!`$rr"(rI`#`m
5)B[`!$$*#Ar3"p&51+aL!LT*([93!'NN"U(`!$h`!$J33([3NXFJ!eJ!#dHCP+&
`$pm`NH,h!3-j"8@3!*%*1Bpl8)Uh#(KJq3)C+C%S1C!![YCUBa"X'Q3$(@Q,UXC
U54#AE#Q8!1#9M[GVVTD3!!T8PRD*Li(RDR[CA3j!$q&`$h!J)MKJ!M,`#2f9%)Y
d,IpJ$9Xa!,i!!!h3"%'J1CcM1D!$&bh`,L5a!BU6,dBN,Zq#%q)#!+5#$DXj,lC
*,`26((B84h981Nr`Km!CR-)CR*ACK3I3,3#`"Gm5!$KaR-HTR1R`1G`L#0c##+%
!!+*M!!A!%c"`RCS!!!M`$r3J%KU3!"$FJJN'84A1QC`"N!!1)8%"G3-$+!!!0K!
!XK!!m-!Yf`)!Pe#GejQGfmNDh3N!hiN!!U)[jJN!Q&!h'$#I(!!!$U!!CRQA$D#
IhJQHrq!1)K%&#BS*+S!"$p!kA58lY'-lZ&-mqXNYPr#I!4'J*6'J"GS3)X%'(BS
r+a!2(l!"4""AL1K',5HLX%1LY6-&VJGl+FUIaiN6!K!J2S#F2K!!fF!YM5#Ph$)
)UB%@$&!EkkHP@GScC9!$5$!9"I!b)T!!S&B+!,mjR'UkTQXU4R")%Q9!"-JJTR!
!!'9U,8j""$``&3rJ"aiK#JC4'l84Td3`&34J",3"U0Q#!AQ+$LY3%%'"!iVU&9f
+&K-`!8,4T9YD%*TDU5A4!,8K!!dJ#*c+TDCD%!q!&*Y+!+$D!)C3UJ"`!+2+!))
`UkGU!+"DU`a30jXUUS-!UjXDV+N+U`13!+[4!DbGHUV"QUc)UUc-ZUc1HUTB'Uf
C+UfYHDhBQUhDfMKaLJXK8"+DHDIr`!SLmD8S%#!6i!)"S!#M%+J!`&eaLJhI1J"
b3"[Y+K*JN!#R32#Y!S!2GPS'1)'Tq9S'3`!(8c%!2%#IT3#E!$!(6J%%1(#`jAQ
RfH+`FFS-8b%!RFN!peSEIq!84F!!"dX+!%!%(3X!Lj!!Tq$`U!+3!"8ZF,+A!,+
&HK$T`E(K-JSJ5`)(kkF8Q`%!J,0a5Jq'qK')`%2Pf4&P8!48m+J"-*kF!#qeSCP
*5`&633(jUJ8R+`j133-4@b2)B+rZUU&P3!0!-"85d"%FLa0)`4Ga#Jp6B3!iJ3+
N%&m"N!!!HFS1EkZ00JX!Ca!!&C!!Tq6`YMBJ!2V!3mV4&((+$914!$!!YJ#!"3'
!#&X,"S[,!`+J#)BE!1#`Y@%+!!YJ$)kl"!(!$PX,"91a!0)J!&CJZ!*`!eZ,"92
K!21jYbFJ!%1`Y@J3Zc33!$l!ZQU`Y3B,!!p3VcEl$m!J!(D`YEJ3)"+J'"C`XJ8
aYS``&3&J"Bk,&-SaYX6`U"*J'"B`YpQb!3%`YX!JTZVJZ#83N!$M@`08`+Fr9,J
N`36VHc)emTdLF,,bqk8X3,f0ZlHe!EPILJ'25J$`!)DM%&m!3!B"3!DBJ!eQ@kB
UX!2Z#JIV1l-4B!qY)X(C`JIVL`"6%3(-!!!4l+k)X-#B`!U2'J'L)-)DA"Z8-,i
d3!NTM!FXl+kJB-,%F,$qi,Le`3SQ6!U21J$S8#-(R#fi!-1Fm-''`3)Y$!$%B-+
BB+KF`--!!!d`M!pL+JdE8F5e`3d`M!SIA*ibd-6SB-,3-"83X,Nkd-6d!-1N)+D
5X"8Y2"4M5`eLDU"!--IC5`-BHa!Xi,J&J3%`c!m"3J"9FEq"'J##r+8%)+BBl,m
"3!)Q$!Y-Ql!D`-8"!!-`6!A-5`d!J,9I!4VV5`(-5m1)M%-mX,iF`,5F!!"'J,-
iK!6V#`,8HllX'XVDL#d"S,8*BD!PS3a8N4!$`#d*J4!(34#X8Fa5%-`!8!!l)5!
8--A&$"(q)!"$c!#,J3!!!:
---