Re: VIC 20 - BASIC ROM pinout

From: MagerValp (MagerValp_at_cling.gu.se)
Date: 2001-01-16 19:02:18

>>>>> "DG" == Daniele Gratteri <daniele_gratteri@inwind.it> writes:

DG> Can you tell me how to adapt the 2764 for the 2364 socket?

         2764
    +----._.----+          
 1 -|Vpp     Vcc|- 28               2364
 2 -|A12    /pgm|- 27          +----._.----+
 3 -|A7       nc|- 26       A7 | 1       24| Vcc
 4 -|A6       A8|- 25       A6 | 2       23| A8 
 5 -|A5       A9|- 24       A5 | 3       22| A9 
 6 -|A4      A11|- 23       A4 | 4       21| A12
 7 -|A3      /OE|- 22       A3 | 5       20| /CS
 8 -|A2      A10|- 21       A2 | 6       19| A10
 9 -|A1      /CE|- 20       A1 | 7       18| A11
10 -|A0       D7|- 19       A0 | 8       17| D7 
11 -|D0       D6|- 18       D0 | 9       16| D6 
12 -|D1       D5|- 17       D1 |10       15| D5 
13 -|D2       D4|- 16       D2 |11       14| D4 
14 -|Vss      D3|- 15      Vss |12       13| D3 
    +-----------+              +-----------+

Simply match up the pins with the same name and rewire the rest. /pgm
and Vpp on the 2764 should be connected to Vss (ground).

PS: could someone *please* explain why they didn't make them pin
    compatible? Why isn't the world using 2564 EPROMs anyway?

-- 
    ___          .     .  .         .       . +  .         .      o   
  _|___|_   +   .  +     .     +         .   .  Per Olofsson, konstnär
    o-o    .      .     .   o         +          MagerValp@cling.gu.se
     -       +            +    .     http://www.cling.gu.se/~cl3polof/
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