80
HCD-ZX80D/ZX100D
Pin No.
Pin Name
I/O
Description
81
VSS-CPU
-
Ground terminal (for CPU)
82
XOUT
O
System clock output terminal (4 MHz)
83
XIN
I
System clock input terminal (4 MHz)
84
VCC-CPU
-
Power supply terminal (+3.3V) (for CPU)
85 to 100
G24 to G9
O
Grid drive signal output to the fluorescent indicator tube