Well, here's a trace if it means anything to you...doing a load psw...if i understand the opcode, we load the doubleword from the address of the 2nd operand in the operation...it contains all 0s: I 00C Tracing active at IPL 0000003 FILES CHANGED -> 00010028 TPROT E50150000000 10000000 00000000 CC 2 *** 00010028 PROG 0005 -> 00010060 ADDRESSING -> 000100D8 MVPG B2540012 00000000 00000000 *** 000100D8 PROG 0001 -> 000100E0 OPERATION -> 0028744C ???? 0000 *** 0028744C PROG 0001 -> 000100E0 OPERATION HCPGIR453W CP entered; program interrupt loop -> 000100E0 LPSW 8200D0E6 00159552 *** 000100E0 PROG 0006 -> 000100E0 SPECIFICATION D T0000D0E6 R0000D0E0 00000000 00000000 00000000 00000000 06 *................* D T00100E0 R000100E0 8200D0E6 07070707 00080000 80011000 06 *b..W............* D T0159552 R00159550 43105000 432B1000 A7210004 A784001D 06 *..&.....x...xd..* B HCPGIR453W CP entered; program interrupt loop -> 000100E0 LPSW 8200D0E6 00159552 *** 000100E0 PROG 0006 -> 000100E0 SPECIFICATION D P PSW = 00080000 800100E0 -- Todd Blevins On Fri, 12 Apr 2002, Post, Mark K wrote: > q cpu > CPUID = FF04379796720000 > We are running under VM > This machine has no IEEE fpu > ... > Detected 2 CPU's > Boot cpu address 0 > cpu 0 phys_idx=0 vers=FF ident=043797 machine=9672 unused=0000 > cpu 1 phys_idx=1 vers=FF ident=043797 machine=9672 unused=0000 > > I have 128MB defined as I mentioned earlier. > > Mark > > -----Original Message----- > From: Todd Blevins [mailto:tblevins@cisco.com] > Sent: Friday, April 12, 2002 12:20 PM > To: Post, Mark K > Subject: RE: [Redhat-s390-list] latest from rawhide > > > > What kind of system did you ipl these on? > >