8279

Programmable Keyboard / Display Interface

Pinout

DIP40
         +---\/---+
     RL2 | 1    40| Vcc
     RL3 | 2    39| RL1
     CLK | 3    38| RL0
     IRQ | 4    37| CNTL/STB
     RL4 | 5    36| SHIFT
     RL5 | 6    35| SL3
     RL6 | 7    34| SL2
     RL7 | 8    33| SL1
   RESET | 9    32| SL0
     *RD |10    31| OUT B0
     *WR |11    30| OUT B1
     DB0 |12    29| OUT B2
     DB1 |13    28| OUT B3
     DB2 |14    27| OUT A0
     DB3 |15    26| OUT A1
     DB4 |16    25| OUT A2
     DB5 |17    24| OUT A3
     DB6 |18    23| *BD
     DB7 |19    22| *CS
Vss(GND) |20    21| A0
         +--------+

Frequency

DIP40
Set reader to FREQ, put black probe to GND, red probe to 3 to measure CPU clock

Files

• 
  TMP82C79 Datasheet