John Dondzila wrote:
>
> Does anyone know how to use standard 2716's
> on a Space Invaders board ?
>
> I've been looking all over for pinouts
> for these damn TMS2716's but have had no luck.
A normal (non-TMS) 2716 versus a TMS2716 pins out like this:
<----- normal 2716 -----><---- TMS2716 pin redefinitions ---->
+-----+ +-----+
A7 |1 +--+ 24| VCC <--- Vcc/PE (PE is Program Enable)
A6 |2 23| A8
A5 |3 22| A9
A4 |4 21| VPP <--- Vbb (-5 volts)
A3 |5 20| /OE <--- A10
A2 |6 19| A10 <--- Vdd (+12 volts)
A1 |7 2716 18| /CE <--- S/PGM (chip select/program)
A0 |8 17| D7
D0 |9 16| D6
D1 |10 15| D5
D2 |11 14| D4
GND |12 13| D3
+--------------+
|