Z80 Datasheet, PDF (166/330 Pages) Zilog, Inc. – Z80 CPU PERIPHERALS

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+5V
G1
Y0
CE0
G2A Y1
CE1
G2B _Y2
CE2
LS138
C
Y3
CE3
LA4
B
Y4
LA3
A
RETI
Y5
LS06
IORQ
DS
AS
LA5
From Z8000
Data Bus
IORQ
CLOCK
+5V
PRE
D
Q
LS74
CLK _Q
CLR
LS04
LS32
LS10
PRE
D
Q
LS74
CLK Q
+5V ^CLR
LS10
LS32
LS06
IORQ ^{To Z80}
Peripherals
LS08
RD
R/W
(Vectored Interrupt Acknowledge from ST3-ST0)
VIACK
Figure 57. Z8000/Z80 Peripheral Interface
UM008101-0601
Direct Memory Access