23xx to 27xx EPROM adaptors

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MADrigal
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23xx to 27xx EPROM adaptors

Post by MADrigal » Sat May 11, 2013 4:17 pm

I just made a couple of EPROM adaptors to allow me read:

- 2332 masked PROM on a rom-programmer set to read the 2732 UV-erasable EPROM
- 2364 masked PROM on a rom-programmer set to read the 2764 UV-erasable EPROM

This is the 2332-to-2732 diagram

Code: Select all

       2332/2532 (4kx8 PROM)            2732 (4kx8 EPROM)

        +-----+--+-----+                +-----+--+-----+
    A7  |1    +--+   24| VCC        A7  |1    +--+   24| VCC
    A6  |2           23| A8         A6  |2           23| A8 
    A5  |3           22| A9         A5  |3           22| A9 
    A4  |4           21| CE2        A4  |4           21| A11
    A3  |5           20| /CE1       A3  |5           20| /CE + VPP
    A2  |6    2332   19| A10        A2  |6    2732   19| A10 
    A1  |7           18| A11        A1  |7           18| /OE 
    A0  |8           17| D7         A0  |8           17| D7  
    D0  |9           16| D6         D0  |9           16| D6  
    D1  |10          15| D5         D1  |10          15| D5
    D2  |11          14| D4         D2  |11          14| D4  
VSS/GND |12          13| D3     VSS/GND |12          13| D3  
        +--------------+                +--------------+


ADAPTOR CONNECTIONS

2332 SIDE           2732 side
=============================
18 (A11)            21 (A11)
20 (/CE1)           18 (/OE) + 20 (/CE + VPP, passthrough)
21 (CE2, remove)    nc
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MADrigal
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Re: 23xx to 27xx EPROM adaptors

Post by MADrigal » Sat May 11, 2013 4:32 pm

And this is the 2364-to-2764 diagram.

Please notice that the 2364 layout is about the "DIP-24" version, not the "DIP-28" version!

Code: Select all

       2364/2564 (8kx8 PROM)            2764 (8kx8 EPROM)
       * DIP-24 PACKAGE *
                                        +-----+--+-----+
                                    VPP |1    +--+   28| VCC
        +-----+--+-----+            A12 |2           27| /PGM
    A7  |1    +--+   24| VCC        A7  |3           26| NC
    A6  |2           23| A8         A6  |4           25| A8
    A5  |3           22| A9         A5  |5           24| A9
    A4  |4           21| A12        A4  |6           23| A11
    A3  |5           20| /CS        A3  |7    2764   22| /OE
    A2  |6           19| A10        A2  |8           21| A10
    A1  |7    2364   18| A11        A1  |9           20| /CE
    A0  |8           17| D7         A0  |10          19| D7
    D0  |9           16| D6         D0  |11          18| D6
    D1  |10          15| D5         D1  |12          17| D5
    D2  |11          14| D5         D2  |13          16| D4
VSS/GND |12          13| D3     VSS/GND |14          15| D3
        +--------------+                +--------------+



ADAPTOR CONNECTIONS

2364 SIDE           2764 side
=============================
12 (VSS/GND)        20 (/CE) + 14 (VSS/GND, passthrough)
18 (A11)            23 (A11)
21 (A12)            2  (A12)
24 (VCC)            27 (/PGM) + 28 (VCC, join to 27)
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Mobsie
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Re: 23xx to 27xx EPROM adaptors

Post by Mobsie » Sat May 11, 2013 4:33 pm

WOW!
Thank you.
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