Zilog Z80380 Manuel d'utilisateur Page 63

  • Télécharger
  • Ajouter à mon manuel
  • Imprimer
  • Page
    / 268
  • Table des matières
  • MARQUE LIVRES
  • Noté. / 5. Basé sur avis des utilisateurs
Vue de la page 62
5-29
Z380
USER'S MANUAL
ZILOG
DC-8297-03
BIT
BIT TEST
BIT b,dst dst = R, IR, X
Operation: Z NOT dst(b)
The specified bit b within the destination operand is tested, and the Zero flag is set to 1 if
the specified bit is 0, otherwise the Zero flag is cleared to 0. The contents of the destination
are unaffected. The bit to be tested is specified by a 3-bit field in the instruction; this field
contains the binary encoding for the bit number to be tested. The bit number b must be
between 0 and 7.
Flags: S: Unaffected
Z: Set if the specified bit is zero; cleared otherwise
H: Set
V: Unaffected
N: Cleared
C: Unaffected
Addressing Execute
Mode Syntax Instruction Format Time Note
R: BIT b,R 11001011 01bbb-r- 2
IR: BIT b,(HL) 11001011 01bbb110 2+r
X: BIT b,(XY+d) 11y11101 11001011 ——d— 01bbb110 4+r I
Field Encodings: r: per convention
y: 0 for IX, 1 for IY
Vue de la page 62
1 2 ... 58 59 60 61 62 63 64 65 66 67 68 ... 267 268

Commentaires sur ces manuels

Pas de commentaire