as.info: Z8000-Regs

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Register Names

   The Z8000 has sixteen 16 bit registers, numbered 0 to 15.  You can
refer to different sized groups of registers by register number, with
the prefix `r' for 16 bit registers, `rr' for 32 bit registers and `rq'
for 64 bit registers.  You can also refer to the contents of the first
eight (of the sixteen 16 bit registers) by bytes.  They are named `rNh'
and `rNl'.
_byte registers_
     r0l r0h r1h r1l r2h r2l r3h r3l
     r4h r4l r5h r5l r6h r6l r7h r7l
_word registers_
     r0 r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 r11 r12 r13 r14 r15
_long word registers_
     rr0 rr2 rr4 rr6 rr8 rr10 rr12 rr14
_quad word registers_
     rq0 rq4 rq8 rq12