1989_MELPS_7700_Software_Manual

APPENDIX B
Series MELPS 7700 Machine Instructions
MACHINE INSTRUCTIONS
Addressing mode
Symbol FunctIon Details IMP IMM A DIR DIR,b DIR,X DIR,Y (DIRI (DIR,xl (DlRI,V
op n #op n # op n #op n # opn # op n # op n #op n # op n # op n #
ADC Acc,C - Acc+M+C Adds the carry, the accumulator and the memory contents 692 2 6542 75 5 2 726 2 61 7 271 B 2
(Note 1,21 The result IS entered Into the accumulator When the 0
flag IS wO". binary additions IS done, and when the 0 flag IS 42 4 3 42 6 3 427 3 42 B 3 42 9 3 4210 3
'T', decimal addition IS done 69 65 75 72 61 71
AND Ace -- Accl\M ObtainS the logical product of the contents of the accumu- 292 2 25 4 2 355 2 326 2 21 7 2 31 B 2
(Note 1,21
lalor and the contents of the memory The result IS entered
mto the accumulator 424 3 426 3 42 7 3 428 3 42 9 3 42 10 3
29 25 35 32 21 31
ASL m=O Shifts the accumulator or the memory contents one bit to OA 2 I 067 2 16 7 2
(Note II [QJ~-O the left "0" IS entered Into bit 0 of the accumulator or the
m=l
memory The contents of bit 15 (bit 7 when the m flag IS 42 4 2
"1") of the accumulator or memory before shift IS entered OA
[QJ~-O mto the C flag
BBC Mb=O'> Tests the specified bit of the memory Branches when aU
(Note 3,51 the contents of the specified bit IS "0"
BBS Mb=l') Tests the specified bit of the memory Branches when all
(Note 3,51 the contents of the specified bit IS "1"
BCC C=O? Branches when the contents of the C flag IS ~O~
(Note31
BCS C=I? Branches when the contents of the C flag IS ~1"
(Note31
BEQ Z=1 " Branches when the contents of the Z flag IS "1"
(Note31
BMI N=I? Branches when the contents of the N flag IS "1"
(Note 31
BNE Z=O? Branches when the contents of the Z flag IS "0"
(Note31
BPL N=O? Branches when the contents of the N flag IS "0"
(Note 31
BRA PC-PC±offset Jumps to the address Indicated by the program counter
(Note 41 PG-PG+I plus the offset value
(carry occured)
PG-PG-I
(borrow occured)
BRK PC-PC+2 Executes software interruption 0015 2
M(SI-PG
S-S-I
M(SI-PCH
S-S-I
M(SI-PCl
S-S-I
M(si-PSH
S-S-I
M(SI-PSl
S-S-I
I-I
PCl-ADl
PCH--ADH
PG-0016
BVC V=O? Branches when the contents of the V flag IS "0"
(Note 31
BVS V=l" Branches when the contents of the V flag IS "1"
(Note 31
CLB Mb-O Makes the contents of the specified bit In the memory "0" 14 8 3
(Note 51
CLC C-O Maltes the contents of the C flag ~O" 18 2 I
CLI 1-0 Makes the contents of the I flag "0" 58 2 I
ClM m-O Makes the contents of the m flag "0" 082 I
CLP PSb-O Specifies the bit POSition In the processor status register by the bit C2 4 2
pattem of the second byte In the Instruction, and sets "0" In that bit
CLV V-O Makes the contents d the V flag MO" sa 2 I
CMP I\cc-M Compares the contents of the accumulator With the contents of C9 2 2 C5 4 2 055 2 026 2 CI 7 2 D1 8 2
(Note 1,21
the memory
42 4 3 42 6 3 427 3 42 8 3429 342 10 3
C9 C5 05 02 CI 01
252