Thanks to Kev and Zonn for the original DUMPER.ZIP setup.

I just fixed a rotten Atari Football (4 player) by first downloading the PROMs (16 of the suckers 1K X4) directly from the board, then burning the image into a single 2764.

Next using two 74LS86 gates to set the OE (the first one picking off Program 0 and 1, XORing them, then use the second XOR gate to invert (tie one input high) and the resulting output drives the OE just fine. Grab A11 and A12 lines (bend the legs out of the 2764) and tie pins 26, 27, 28 & 1 all together and it works just fine to replace the 16 PROMs.

Now I don't have to replace lots of sockets/PROMs with corroding legs...

John :-#)#

At 04:26 PM 01/08/2002 -0700, Zonn wrote:

On Thu, 01 Aug 2002 16:07:07 -0700, John Robertson <jrr@flippers.com> wrote:

>To continue this a bit, I wrote a simple dumper (based on the one in the
>Programming manual) that runs a fair bit faster than Kev's, the only
>problem is that is sends unformatted ASCII text to my terminal program, but
>I have no simple converters to fix this to binary...
>
>Here is the .s code
>
>
>PROGRAM 0   68 BYTES
>
>    DPY-FIRST /1 LAST /2         :Sets Start and End of ROM
>    REG1 = REG1 AND FFF0         :
>
>1: LABEL 1
>    READ @ REG1
>    AUX-$E+
>    INC REG1
>    DPY-$1                     :Displays next memory read
>    IF REG2 >= REG1 GOTO 1
>    STOP
>
>A bit shorter...and faster dumping, can anyone (Zonn?) edit the small
>Hex32Bin.EXE or Hex2BIN32.EXE to just handle raw ASCII conversion to Binary?

Sure, just send me an example of the raw ASCI dump, and I'll modify the program
to convert the data.

-Zonn