PIC18Fxx39 using Table Read Post Inc programming command(Solved)

[SuzyC]

When verifying a program, the TABLE READ POST INCREMENT automatically increments the Table Pointer to the next byte address to be read.

Question:  This command increments TablePointer Low. When this command is repeated until the increment reaches 256, does the TablePointerLow roll-over back to 0 and a carry propagate to increment TablePointer High?

Thanks in advance for your help, the Programming Specsheet is not clear about this.

[Bruce Abbott]

Question:  This command increments TablePointer Low.

It increments TBLPTR, which is a 21 bit register. So no, it doesn't wrap around.

Operation of TBLRD with post increment (PIC18Fxx39 manual page 249):-

(Prog Mem (TBLPTR)) -> TABLAT;
(TBLPTR) +1 -> TBLPTR;

To address the program memory, a pointer called Table Pointer (TBLPTR) is used.
The TBLPTR (a 21-bit pointer) points to each byte in the program memory.

[SuzyC]

Thanks Bruce Abbott,

I didn't realize that this read-postinc programming-use command was also a runtime instruction that works in the same way and the detailed info about it was right under my nose in the 18Fxx39 SpecSheet instead of the programming Specsheet!

What threw me off is that most of the Programming Spec examples manipulating the TABLPTR divide the TABLPTR into Hi, Lo, and Upper bytes and these registers are loaded with address values individually.