NorthStar Z80 Manual page 19

F. Check for the following signals at the Z80 chip:
Signal
PHI
Ml/
INT/
NMI/
WAIT/
• 'RST/
Vcc
ground
Location
pin 6
pin 27
pin 16
T;>in 17
pin 24
pin 26
pin 11
pin 29
Description
AC, (+125ns,250ns)
AC, (-500ns,2750ns)
HIGH
HIGH
HIGH
HIGH
+5V
GND
G. The following signals should be observed on the mot:-herboard
bus lines:
Signal
XRDY
VI0/
VII/
VI2/
VI3/
VI4/
VI5/
VI6/
VI7/
NMI/
STAT-DSBL/
CC-DSBL/
ADDR-DSBL/
DO-DSBL/
PHLDA
PWAIT
PINTE
SMI
SOUT
SINP
SMEMR
SHLTA
SSW-DSBL/
PMREQ/
PRFSH/
MWRITE
RUN
PINT/
PHOLD/
PSYNC
PWR/
PDBIN
SwO/
Location
pin 3
pin 4
pin 5
pin 6
pin
7
pin 8
pin 9
pin 10
pin 11
pin 12
pin 18
pin 19
pin 22
pin 23
pin 26
pin 27
pin 28
pin 44
pin 45
pin 46
pin 47
pin 48
pin 53
pin 65
pin 66
pin 68
pin 71
pin 73
pin 74
pin 76
pin 77
pin 78
pin 97
Description
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
LOW
LOW
HIGH
AC, (+500ns,2750ns)
LOW
LOW
AC , (+375 n s , 2750 ns)
LOW
HIGH
AC, 4 -pulses every 2750ns
AC, (-475ns,2750ns)
AC, (+250ns twice,2750ns)
HIGH
HIGH
HIGH
AC, 3 +pulses every 2750ns
AC, (-250ns twice, 2750ns)
AC, (+360ns, 275011s)
AC, (-250ns twice, 2750ns)
North Star Z80A PROCESSOR BOARD
18