Convert the following UNSIGNED numbers:
Decimal Binary Hexadecimal
1236 ________________________ ______________________
__________________ 10 0001 1010 ______________________
__________________ ________________________ 3058
Do the following UNSIGNED integer arithmetic:
BINARY: 1 1 0 1 1 1 0 0 0 0 1
+ 1 1 1 0 - 1 1 1 0 1
HEXADECIMAL 2 A F 9 4 9 C 3 E
+ 4 1 8 D - 3 B 8 7 0
Do the following two's complement arithmetic and determine if overflow
occurred:
3 2 8 A C 1 0 5 7 8 E E B C 0 5
+ 7 F 8 4 6 9 5 1 - 2 0 0 9 8 7 0 1
Answer the following questions using the given PSW and memory contents. Be sure to give the address answers in hexadecimal.
PSW AT ABEND FFC50006 A0000018 REGS 0-3 F4F4F4F4 F4F4F4F4 F4F4F4F4 000009A1 REGS 4-7 F4F4F4F4 F4F4F4F4 F4F4F4F4 F4F4F4F4 REGS 8-11 F4F4F4F4 F4F4F4F4 F4F4F4F4 F4F4F4F4 REGS 12-15 F4F4F4F4 00000078 FFFE7960 00000000 USER STORAGE 000000 5830F048 5A30F04C 5A30F050 5A30F054 5B30F058 5A30F05E 5B30F074 5030F060 000020 5830F06C 5A30F070 5030F068 5830F060 5B30F068 5030F064 E1600000 0000E060 000040 F0480030 07FEF5F5 00000695 00000156 000001BD 00000069 00000070 0000012C 000060 F5F5F5F5 F5F5F5F5 F5F5F5F5 00000447 00000159 000000F7 F5F5F5F5 00000000 000080 F5F5F5F5 F5F5F5F5 F5F5F5F5 F5F5F5F5 F5F5F5F5 F5F5F5F5 F5F5F5F5 F5F5F5F5
What is the address of the instruction that would have been executed next had the program not abended on the current instruction?
________________________________________________________________
What is the length (in bytes) of the instruction that caused the abend?
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What is the condition code (in decimal)?
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What is the address of the instruction that caused the abend?
________________________________________________________________
What type of program interrupt occurred?
Number __________________ Name _______________________________
Write the instruction that caused the abend in EXPLICIT assembler language.
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Explain, in detail, why the program abended.
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Fill in the blanks in the assembly listing below, using IMPLICIT addressing where possible:
LOCATION
COUNTER MACHINE SOURCE
VALUE (HEX) LANGUAGE LANGUAGE
000000 TEST CSECT
000000 USING TEST,15
000000 ______________________ L 3,NUM1
_________________ 5C20 F02C _______________________
_________________ ______________________ D 2,FOURFIVE
_________________ ______________________ LR 4,2
_________________ 1A44 _______________________
_________________ 5940 F030 _______________________
_________________ ______________________ BC B'0100',AROUND
_________________ ______________________ LA 3,1(,3)
_________________ 5030 F038 AROUND _______________________
_________________ ______________________ LNR 5,3
_________________ ______________________ ST 5,NQ
_________________ 07FE _______________________
_________________ ______________________ NUM1 DC F'1685'
_________________ 00000001 ONE DC F'1'
_________________ ______________________ FOURFIVE DC F'45'
_________________ ______________________ TWOFIVE DC 2C'5'
000038 ______________________ Q DS F
_________________ ______________________ NQ DS F
END TEST ,
Using the provided register and storage contents, show the complete contents (n hexadecimal) after execution of the instruction. Results are NOT cumulative.
REGS 0-3 00000004 000000F9 00000000 000000A1 REGS 4-7 FFFFFFFF FFFFFFED 00000010 FF00014A REGS 8-11 07007007 00000000 FFFFFFFF 00000060 REGS 12-15 F4F4F4F4 00000078 FFFE7960 00000000 USER STORAGE 000000 5830F048 5A30F04C 5A30F050 5A30F054 5B30F058 5A30F05E 5B30F074 5030F060 000020 5830F06C 5A30F070 5030F068 5830F060 5B30F068 5030F064 E1600000 0000E060 000040 F0480030 07FEF5F5 00000695 00000156 000001BD 00000069 00000070 0000012C 000060 F5F5F5F5 F5F5F5F5 F5F5F5F5 00000447 00000159 000000F7 F5F5F5F5 00000000 000080 F1F1F1F1 F2F2F2F2 F3F3F3F3 F4F4F4F4 F5F5F5F5 F6F6F6F6 F7F7F7F7 F8F8F8F8 AR 6,1 Reg 6 = ______________________ M 2,=F'3' Reg 2 = ______________________ Reg 3 = ____________________ LA 11,52(,11) Reg 11 = ______________________ LPR 8,5 Reg 8 = ______________________ DR 4,0 Reg 4 = ______________________ Reg 5 = ____________________ L 1,12(6,0) Reg 1 = ______________________
For questions 1 - 6, write the assembly instructions to perform the following tasks. (Be sure to define any extra storage that you may need). Use literals where possible.
Show two ways to initialize register 4 to the value 9.
Put the four bytes starting at address 12 (in decimal) into register 5.
Put the contents of register 9 into storage starting at address 88 (in hexadecimal).
Branch to the label HERE if the condition code is 1 or 3.
Put the value 146 into register 6 without using a literal.
Compare the contents of registers 4 and 8.
For questions 7 - 10, answer the following questions.
a) Assuming signed numbers, is 5FFFFFF7 positive or negative?
b) How can you tell?
Calculate the following D(X,B) address.
Register 0 = 00000005 Register 4 = 00000009 24(4,0) = _________________________________________ (in hexadecimal)
a) What registers will be multiplied using the following code?.
MR 8,5
b) Where will the answer be stored?
a) Where is the dividend located in the following divide instruction?.
DR 2,5
b) Where will the remainder be after execution of the instruction?