Wishlist of instructions for the Z80
                    ====================================

Sometime in about 1985 or 1986, Greg Heslington and I put together a list of
additional instructions that it would be useful if the Z80 had. We worked
out that almost all of them could be actually assembled to Z80 code by an
assembler that understood the additional instructions, for instance, by
defining macros.

8-bit data movement
-------------------
LD r,r        LD r,n        LD r,(rr+n)   LD (rr+n),r   LD r,(nn)     LD (nn),r

16-bit data movement
--------------------
LD rr,rr      LD rr,nn      LD rr,(rr+n)  LD (rr+n),rr  LD rr,(nn)    LD (nn),rr
PUSH rr       POP rr

8-bit arithmetic
----------------
alu r,r       alu r,n       alu r,(rr+n)  alu (rr+n),r  alu r,(nn)    alu (nn),r
INC r         DEC r         INC (rr+n)    DEC (rr+n)    INC (nn)      DEC (nn)

16-bit arithmetic
-----------------
alu rr,rr     alu rr,nn     alu rr,(rr+n) alu (rr+n),rr alu rr,(nn)   alu (nn),rr
INC rr        DEC r         INC (rr+n)    DEC (rr+n)    INC (nnnn)    DEC (nnnn)

Rotations/Bit operations
------------------------
rot r         rot (rr+n)    rot (nn)      bit n,r       bit n,(rr+n)  bit n,(nn)

Exchanges
---------
EX r,r        EX r,(rr+n)   EX r,(nn)     EX rr,rr      EX rr,(rr+n)  EX rr,(nn)

Program control
---------------
CALL rr       CALL nn       CALL (rr+n)    CALL (nn)
CALL cc,rr    CALL cc,nn    CALL cc,(rr+n) CALL cc,(nn)
JP rr         JP nn         JP (rr+n)      JP (nn)
JP cc,rr      JP cc,nn      JP cc,(rr+n)   JP cc,(nn)
RET           RET cc        JR nn          JR cc,nn

Block Copy/Etc
--------------
{LD,CP}{I,D}{,R}

Input/Output
------------
IN r,(rr)     OUT (rr),r    IN r,(nn)     OUT (nn),r
IN{I,D}{,R}   OT{I,D}{,R}

Other Instructions
------------------
SCF    CCF    NEG    CPL    RLD    RRD    DAA    NOP
DJNZ   RST nn EI     DI     IM n   RETN   RETI
LD A,R LD R,A LD A,I LD I,A EXX    EX AF,AF'

Abbreviations
-------------
r:   A   F   B   C   D   E   H   L   IXL IXH IYL IYH
rr:  AF  BC  DE  HL  IX  IY  SP  PC
alu: ADD ADC SUB SBC AND XOR OR  CP
rot: RLC RRC RL  RR  SLA SRA SLS SRL
bit: BIT RES SET
cc:  C   NC  Z   NZ  P   M   PE  PO
nn:  16-bit immediate
n:   8-bit immediate