8.9.2.2 Register Names
You can use the predefined symbols r0, r1, r2, r3, r4, r5, r6, and r7 to refer to the H8/500 registers.
The H8/500 also has these control registers:
-
cp
- code pointer
-
dp
- data pointer
-
bp
- base pointer
-
tp
- stack top pointer
-
ep
- extra pointer
-
sr
- status register
-
ccr
- condition code register
All registers are 16 bits long. To represent 32 bit numbers, use two adjacent registers; for distant memory addresses, use one of the segment pointers (cp
for the program counter; dp
for r0
– r3
; ep
for r4
and r5
; and tp
for r6
and r7
.