Zilog Z08470 Bedienungsanleitung Seite 238

  • Herunterladen
  • Zu meinen Handbüchern hinzufügen
  • Drucken
  • Seite
    / 326
  • Inhaltsverzeichnis
  • LESEZEICHEN
  • Bewertet. / 5. Basierend auf Kundenbewertungen
Seitenansicht 237
Z80 Instruction Set UM008007-0715
226
Z80 CPU
User Manual
r identifies registers B, C, D, E, H, L, or A assembled as follows in the object code field:
Description
The contents of operand m are rotated right 1 bit position through the Carry flag. The con-
tents of bit 0 are copied to the Carry flag and the previous contents of the Carry flag are
copied to bit 7. Bit 0 is the least-significant bit.
Condition Bits Affected
S is set if result is negative; otherwise, it is reset.
Z is set if result is 0; otherwise, it is reset.
H is reset.
P/V is set if parity even; otherwise, it is reset.
N is reset.
C is data from bit 0 of source register.
Example
The HL register pair contains 4343h and memory location 4343h and the Carry flag con-
tain the following data.
Register r
B 000
C 001
D 010
E 011
H 100
L 101
A 111
Instruction M Cycles T States 4 MHz E.T.
RR r 2 8 (4, 4) 2.00
RR (HL) 4 15 (4, 4, 4, 3) 3.75
RR (IX+d) 6 23 (4, 4, 3, 5, 4, 3) 5.75
RR (lY+d) 6 23 (4, 4, 3, 5, 4, 3) 5.75
101110 11
76 4 10253
C
0
Seitenansicht 237
1 2 ... 233 234 235 236 237 238 239 240 241 242 243 ... 325 326

Kommentare zu diesen Handbüchern

Keine Kommentare