Question

Write a machine language program to output your name on the output device. The name you output must be longer than two characters. Write it in a format suitable for the loader and execute it on the Pep/9 simulator.

my name is Kevin

Answer 1

Address	Machine code/object code	Assembly code	Meaning
000	D1 00 1F	LDBA 0x001F,d	Load K
003	F1 FC 16	STBA 0xFC16,d	o/p K
006	D1 00 20	LDBA 0x0020,d	Load e
009	F1 FC 16	STBA 0xFC16,d	o/p e
0C	D1 00 21	LDBA 0x0021,d	Load v
0F	F1 FC 16	STBA 0xFC16,d	o/p v
12	D1 00 22	LDBA 0x0022,d	Load i
15	F1 FC 16	STBA 0xFC16,d	o/p i
018	D1 00 23	LDBA 0x0023,d	Load n
01B	F1 FC 16	STBA 0xFC16,d	o/p n
01E	00	STOP
01F	4B 65 76 69 6E	.ASCII “Kevin”	Ascii of each Character stored in memory
024	zz	.END

Assembly Code

LDBA 0x001F,d
STBA 0xFC16,d
LDBA 0x0020,d
STBA 0xFC16,d
LDBA 0x0021,d
STBA 0xFC16,d
LDBA 0x0022,d
STBA 0xFC16,d
LDBA 0x0023,d
STBA 0xFC16,d
STOP
.ASCII “Kevin”
.END

0000              D1001F              LDBA 0x001F,d
0003            F1FC16                  STBA 0xFC16,d
0006            D10020                  LDBA 0x0020,d
0009            F1FC16                  STBA 0xFC16,d
000C            D10021          LDBA 0x0021,d
000F        F1FC16          STBA 0xFC16,d
0012        D10022          LDBA 0x0022,d
0015        F1FC16          STBA 0xFC16,d
0018        D10023          LDBA 0x0023,d
001B        F1FC16          STBA 0xFC16,d
001E        00              STOP
001F        4B6576696E      .ASCII “Kevin”
0024                                        .END

USing STRO TRAP

Address	Machine code	Assembly code	Meaning
0000	49 00 04	STRO name,d	String output trap
0003	00	STOP
0004	4B 65 76 69 6E	name: .ASCII “Kevin”	Ascii of each Character stored in memory
009		.END