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<DIV><FONT color=#000000 size=2>What is really cool is that someone actually
used that AND is working to improve it even more!</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT> </DIV>
<DIV><FONT size=2>Thanks John & Zonn,</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Kev</FONT></DIV>
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style="BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; PADDING-LEFT: 5px">
<DIV><FONT face=Arial size=2><BR><BR></DIV></FONT>Thanks to Kev and Zonn for
the original DUMPER.ZIP setup. <BR><BR>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. <BR><BR>Next
using two 74LS86 gates to set the <U>OE</U> (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 <U>OE</U> 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.<BR><BR>Now I don't have to replace lots of sockets/PROMs with
corroding legs...<BR><BR>John :-#)#<BR><BR>At 04:26 PM 01/08/2002 -0700,
Zonn wrote:<BR><BR><BR>
<BLOCKQUOTE class=cite cite type = cite>On Thu, 01 Aug 2002 16:07:07
-0700, John Robertson <jrr@flippers.com> wrote:<BR><BR>>To
continue this a bit, I wrote a simple dumper (based on the one in the
<BR>>Programming manual) that runs a fair bit faster than Kev's, the
only <BR>>problem is that is sends unformatted ASCII text to my
terminal program, but <BR>>I have no simple converters to fix this to
binary...<BR>><BR>>Here is the .s
code<BR>><BR>><BR>>PROGRAM 0 68
BYTES<BR>><BR>> DPY-FIRST /1 LAST
/2 :Sets Start and End
of ROM<BR>> REG1 = REG1 AND
FFF0 :<BR>><BR>>1:
LABEL 1<BR>> READ @ REG1<BR>>
AUX-$E+<BR>> INC REG1<BR>>
DPY-$1
:Displays next memory read<BR>> IF REG2 >= REG1
GOTO 1<BR>> STOP<BR>><BR>>A bit shorter...and
faster dumping, can anyone (Zonn?) edit the small <BR>>Hex32Bin.EXE
or Hex2BIN32.EXE to just handle raw ASCII conversion to
Binary?<BR><BR>Sure, just send me an example of the raw ASCI dump, and
I'll modify the program<BR>to convert the
data.<BR><BR>-Zonn</BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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Received on Thu Aug 01 19:20:32 2002
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