I/O Map; I/O Addresses - Sanyo MBC-550 Series User Manual

I/O MAP
I/O Addresses
A0=0
8259* PIC
8259* PIC
AO=1
OOOO
Command/Staius
HB8877A FPC
W88877* FTC Track
HB8877A FOC
Sector
Data HB8877* FOC
V RAM pjg* t«l«cl
PA. . Joy stick
PB. . .Printer data
8255 m
8255 PPI
PC...
8255 PPI
PPI control
8255 PPI
Counter 0
8253 PIT
Counter 1 8253 PIT
Counter 2
8253 PIT
PTT control
8253 PIT
Data (RS-232C)
8251 USABT
Command/Status
8251 USAftT
HD4CS0S CKTC
Address register
Data
HD4C50S cure'
Data (Keyboard)
Command/Status
8251 ',S*kT
8251 US*8T
mr
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