IO map

M100/T102/T200 IO Map

IO	M100	T200
80h-8Fh	Device-select signal for optional IO controller unit
90h-9Fh	Device-select signal for optional answering telephone unit	90h - Ram address (4-bit) 91h - Ram data (4-bit) 9Dh - Timer control(4-bit)
A0h-AFh	Bit 0 - ON/OFF of relay for signal selection of telephone unit Bit 1 - Generates ENABLE signal of LSI for MODEM
B0h-BFh	PIO 81c55	PIO 81c55
C0h-CFh	DATA input/output of UART	UART 8251
D0h-DFh	UART settings	Banks Selection
E0h-EFh	Keyboard return	Keyboard return
F0h-FDh	LCD
FEh	LCD	LCD Command/status
FFh	LCD	LCD Data