Jameco-electronics Rabbit 3000 Bedienungsanleitung PDF herunterladen (Seite 271)

262 Rabbit 3000 Microprocessor

Symbols

Rabbit Z180 Meaning

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

7-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 '

8-bit (signed) displacement added to PC.

Condition code select:

000 = NZ (non zero), 001 = Z (zero),

010 = NC (non carry), 011 = C (carry),

100 = LZ

(logical zero), 101 = LO

†

(logical one),

110 = P (sign plus), 111 = M (sign minus)

Logical zero if all four of the most significant bits of the result are 0.

†

Logical one if any of the four most significant bits of the result are 1.

MSB of a 16-bit constant.

mn mn

16-bit constant.

8-bit constant or 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

Restart address select:

010 = 0x0020, 011 = 0x0030,

100 = 0x0040, 101 = 0x0050,

111 = 0x0070

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

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