(HP71B) ASM question

[ThomasF]

One way to be sure, is to update the code and verify the result.

Comment out the following line, should result in the X value untouched:

Code:

       GOSBVL SPLITA
       C=B    W
       D=C    W
       C=A    W
       A=R1
       B=A    W
       A=R0
*       GOSBVL MP2-15
       GOSBVL PUTABX
       D1=D1+ 5
       RTNCC

1.0 2.0 3.0 4.0 FVARIABLE TBX TBX 7.0 STO X<>Y FSTA.
T: 2
Z: 3
Y: 7
X: 4
L: 4
OK { 0 }
TBX RCL*
OK { 0 }
FSTA.
T: 2
Z: 3
Y: 7
X: 4 <-- Should be 4 after this
L: 4
OK { 0 }

Comment out the following lines, should result in the value of TBX in X:

Code:

       GOSBVL SPLITA
*       C=B    W
*       D=C    W
*       C=A    W
*       A=R1
*       B=A    W
*       A=R0
*       GOSBVL MP2-15
       GOSBVL PUTABX
       D1=D1+ 5
       RTNCC

1.0 2.0 3.0 4.0 FVARIABLE TBX TBX 7.0 STO X<>Y FSTA.
T: 2
Z: 3
Y: 7
X: 4
L: 4
OK { 0 }
TBX RCL*
OK { 0 }
FSTA.
T: 2
Z: 3
Y: 7
X: 7 <-- Should be 7 after this
L: 4
OK { 0 }