Z86319 Datasheet, PDF (20/23 Pages) Zilog, Inc. – PS/2 MOUSE CONTROLLER

Z86319
PS/2 Mouse Controller
Z8 CONTROL REGISTERS (Continued)
R248 P01M
D7 D6 D5 D4 D3 D2 D1 D0
P00-P03 Mode
0 Output
1 Input
Reserved (Must be 0)
Don’t care
Reserved (Must be 0)
Figure 27. Port 0 and 1 Mode Register
(F8H: Write Only)
R249 IPR
D7 D6 D5 D4 D3 D2 D1 D0
Reserved
(Must be 0.)
0000 Reserved
0001 IRQ1>4>5>2
0010 Reserved
0011 IRQ4>1>5>2
0100 IRQ5>2>1>4
0101 IRQ5>1>4>2
0110 IRQ5>2>4>1
0111 IRQ5>4>1>2
1000 IRQ2>1>4>5
1001 IRQ1>4>2>5
1010 IRQ2>4>1>5
1011 IRQ4>1>2>5
1100 IRQ2>5>1>4
1101 Reserved
1110 IRQ2>5>4>1
1111 Reserved
Figure 28. Interrupt Priority Register
(F9H: Write Only)
R250 IRQ
D7 D6 D5 D4 D3 D2 D1 D0
Reserved (Must be 0)
IRQ1 = P33 Input
IRQ2 = P31 Input
Reserved (Must be 0)
IRQ4 = T0
IRQ5 = T1
Reserved (Must be 0)
Figure 29. Interrupt Request Register
(FAH: Read/Write)
Zilog
R251 IMR
D7 D6 D5 D4 D3 D2 D1 D0
1 Enables IRQ
(DX = IRQX)
Reserved (Must be 0)
1 Enable Interrupts
Figure 30. Interrupt Mask Register
(FBH: Read/Write)
R252 Flags
D7 D6 D5 D4 D3 D2 D1 D0
User Flag F1
User Flag F2
Half Carry Flag
Decimal Adjust Flag
Overflow Flag
Sign Flag
Zero Flag
Carry Flag
Figure 31. Flag Register
(FCH: Read/Write)
R253 RP
D7 D6 D5 D4 D3 D2 D1 D0
Don't Care
Register Pointer
Figure 32. Register Pointer
(FDH: Read/Write)
R255 SPL
D7 D6 D5 D4 D3 D2 D1 D0
Stack Pointer Lower
Byte (SP0-SP7)
Figure 33. Stack Pointer
(FFH: Read/Write)
20
PRELIMINARY
DS97KEY1605