6818
Real-time clock with 50 bytes RAM.
+-----+--+-----+
|1 +--+ 24| VCC
X1 |2 23| SQW
X2 |3 22|
AD0 |4 21| /RCLR
AD1 |5 20| VBAT
AD2 |6 146818 19| /INT
AD3 |7 18| /RST
AD4 |8 17| DS
AD5 |9 16| GND
AD6 |10 15| R//W
AD7 |11 14| AS
GND |12 13| /CE
+--------------+

6845
6800 family CRT Controller.
+-----+--+-----+
GND |1 +--+ 40| VSYNC
/RST |2 39| HSYNC
LPSTB |3 38| RA0
MA0 |4 37| RA1
MA1 |5 36| RA2
MA2 |6 35| RA3
MA3 |7 34| RA4
MA4 |8 33| D0
MA5 |9 32| D1
MA6 |10 6845 31| D2
MA7 |11 CRTC 30| D3
MA8 |12 29| D4
MA9 |13 28| D5
MA10 |14 27| D6
MA11 |15 26| D7
MA12 |16 25| /CE
MA13 |17 24| A0
DISPEN |18 23| IORQ
CURSOR |19 22| R/W
VCC |20 21| CLK
+--------------+

6850
6800 family asynchronous communications interface.
+-----+--+-----+
GND |1 +--+ 24| /CTS
RxD |2 23| /DCD
RxCLK |3 22| D0
TxCLK |4 21| D1
/RTS |5 20| D2
TxD |6 19| D3
/IRQ |7 6850 18| D4
CE0 |8 17| D5
/CE2 |9 16| D6
CE1 |10 15| D7
RS |11 14| E
VCC |12 13| R//W
+--------------+

6852
6800 family synchronous serial data adapter.
+-----+--+-----+
GND |1 +--+ 24| /CTS
RxD |2 23| /DCD
RxCLK |3 22| D0
TxCLK |4 21| D1
SM /DTR |5 20| D2
TxD |6 19| D3
/IRQ |7 6852 18| D4
TUF |8 17| D5
/RST |9 16| D6
/CE |10 15| D7
RS |11 14| E
VCC |12 13| R//W
+--------------+

8243
8048 Port expander.
+-----+--+-----+
P5.0 |1 +--+ 24| VCC
P4.0 |2 23| P5.1
P4.1 |3 22| P5.2
P4.2 |4 21| P5.3
P4.3 |5 20| P6.0
/CE |6 19| P6.1
PROG |7 8243 18| P6.2
P2.3 |8 17| P6.3
P2.2 |9 16| P7.3
P2.1 |10 15| P7.2
P2.0 |11 14| P7.1
GND |12 13| P7.0
+--------------+

8250
Asynchronous serial interface controller.
+-----+--+-----+
D0 |1 +--+ 40| VCC
D1 |2 39| /RI
D2 |3 38| /DCD
D3 |4 37| /DSR
D4 |5 36| /CTS
D5 |6 35| MR
D6 |7 34| /OUT1
D7 |8 33| /DTR
RCLK |9 32| /RTS
RxD |10 16450 31| /OUT2
TxD |11 8250 30| INTR
CE0 |12 29|
CE1 |13 28| A0
/CE2 |14 27| A1
/CLKOUT |15 26| A2
X1 |16 25| /ADS
X0 |17 24| CSOUT
/WR |18 23| DDIS