// NOT COMPLETE! // Data file for Carpinelli Relatively Simple example // Carpinelli, pp 233ff // changes ram, name M, size 65536 8 register, name AC, size 8 register, name R, size 8 register, name AR, size 16 register, name PC, size 16 register, name DR, size 8 register, name IR, size 8 register, name TR, size 8 flag, name Z assembler word, bytes 1 format, name f0, words 1, fieldCount 0, codeBits 0 7 format, name f1, words 3, fieldCount 1, codeBits 16 23, f1 0 15 value label NOP , f0, 00 // no operation LDAC, f1, 010000 // load AC from memory STAC, f1, 020000 // store AC to memory MVAC, f0, 03 // move AC to R MOVR, f0, 04 // move R to AC JUMP, f1, 050000 // jump to G JMPZ, f1, 060000 // jump to G if z=1 JPNZ, f1, 070000 // jump to G if z=0 ADD , f0, 08 // add R to AC SUB , f0, 09 // subtract R from AC INAC, f0, 0A // increment AC CLAC, f0, 0B // clear AC AND , f0, 0C // and R with AC OR , f0, 0D // or R with AC XOR , f0, 0E // xor R with AC NOT , f0, 0F // complement AC HLT , f0, FF // HALT endAssembler helpComputer Computer Simulator - Carpinelli Very Simple Computer
The computer is defined in:
Computer Systems: Organization and Architecture
John D. Carpinelli
Addison-Wesley, 2001 endHelp helpAssembler Help for Carpinelli's Relatively Simple computer assembly language.

This computer has the following commands:
Instruction
 Hex
 Code
 Operation
NOP
 0
 0000 0000
 No operation
LDAC
 1
 0000 0000 G AC <-- M[G]
STAC
 2
 0000 0010 G M[G] <-- AC
MVAC
 3
 0000 0011
 R <-- AC
MOVR
 4
 0000 0100
 AC <-- R
JUMP
 5
 0000 0101 G goto G
JMPZ
 6
 0000 0110 G if (Z=1) then goto G
JPNZ
 7
 0000 0111 G if (Z=0) then goto G
ADD
 8
 0000 1000
 AC <-- AC + R, if (AC+R=0) then Z <-- 1, else Z <-- 0
SUB
 9
 0000 1001
 AC <-- AC - R, if (AC-R=0) then Z <-- 1, else Z <-- 0
INAC
 A
 0000 1010
 AC <-- AC + 1, if (AC+1=0) then Z <-- 1, else Z <-- 0
CLAC
 B
 0000 1011
 AC <-- 0, Z <-- 1
AND
 C
 0000 1100
 AC <-- AC AND R, if (AC?R=0) then Z <-- 1, else Z <-- 0
OR
 D
 0000 1101
 AC <-- AC OR R, if (AC?R=0) then Z <-- 1, else Z <-- 0
XOR
 E
 0000 1110
 AC <-- AC XOR R, if (AC?R=0) then Z <-- 1, else Z <-- 0
NOT
 F
 0000 1111
 AC <-- AC', if (AC'=0) then Z <-- 1, else Z <-- 0
HALT
 FF
 1111 1111
 halt processor
endHelp