PCjs Machines
Home of the original IBM PC emulator for browsers.
TI-42 "MBA" Programmable Calculator with Diagnostics
The TI-42 configuration below is identical to our Original configuration, except that it includes diagnostics.
If any errors occur during operation, the Diagnostics window should display the last instruction decoded. The window also accepts a few debugging commands. Use ‘?’ for help.
2nd
Diagnostics
ROM Activity
[No ROM address selected]
Operational Registers
A
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
B
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
C
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Storage Registers
X0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Y0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Y1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Y2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Y3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Y4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Y5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Y6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Y7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0