Rabbit 2000 - 2. Rabbit Design Features

Instruction Reference Manual 9
Document Symbols Key
Table 5: Sym bols
Rabbit Z180 Meaning
b b Bit select (000 = bit 0, 001 = bit 1, 010 = bit 2, 011 = bit
3, 100 = bit 4, 101 = bit 5, 110 = bit 6, 111 = bit 7)
cc cc Condition code select (00 = NZ, 01 = Z, 10 = NC, 11 = C)
d d 8-bit signed displacement. Expressed in two’s complement.
dd ww word register select-destination (00 = BC, 01 = DE, 10 =
HL, 11 = SP)
dd' word register select-alternate(00 = BC', 01 = DE', 10 =
HL')
e j 8-bit (signed) displacement added to PC
f f condition code select (000 = NZ, 001 = Z, 010 = NC, 011 = C,
100 = LZ/NV, 101 = LO/V, 110 = P, 111 = M)
m m the most significant bits(MSB) of a 16-bit constant
mn mn 16-bit constant
n n 8-bit constant or the least significant bits(LSB) of a 16-
bit constant
r, g g, g' byte register select (000 = B, 001 = C, 010 = D, 011 = E,
100 = H, 101 = L, 111 = A)
ss ww word register select-source ( 00 = BC, 01 = DE, 10 = HL, 11
= SP)
v v Restart address select ( 010 = 0020h, 011 = 0030h, 100 =
0040h, 101 = 0050h, 111 = 0070h)
x nbr an 8-bit constant to load into the XPC
xx xx word register select ( 00 = BC, 01 = DE, 10 = IX, 11 = SP)
yy yy word register select (00 = BC, 01 = DE, 10 = IY, 11 = SP)
zz zz word register select (00 = BC, 01 = DE, 10 = HL, 11 = AF)