🚀 go-pugleaf

In article <58@nikhefk.UUCP> keeshu@nikhefk.uucp (Kees Huyser) writes:
>
>Someone asked me about the ROM patch I mentioned in a net posting earlier.
>I dug up some information 'bout it.
> 
> The ROM patch involves the Atari U7 ROM (U7 relates to the PCB name for that
> ROM, visible when you open the case of your ST. It's located in the lower left
> corner of the PCB).
>  
>  information is accurate. Just to be on the safe side: I have a 1040 ST 
>  with normal, legal ROM's, but I replaced the U7 with a patched EPROM. 
>  No hardware modifications are necessary, it's a clean job.
>   
>Location $0CD7 (that is, ofcourse, hex) holds value $14 (also hex). When
>changed into $10 (hex again), the disk I/O becomes a real joy. That's it.
>I believe you need a 27256 EPROM to do the job.
>
>

	After pouring over some dumps of both the rom in question and 
of several sections of memory I have failed to locate the bytes indicated
above.  I have determined that either the locations are wrong or the data
above is wrong.  According to what is see here on this end, U7 and U4 
share the same general area of memory.  U7 is mapped to $FCxxxx-L and 
U4 is mapped to $FCxxxx-H.  It sure would be nice to have a dump of that
eprom uuencoded and placed on the net.   Even the first 8 or so bytes
prior and after the byte to be changed would be nice.





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Any opinions expressed above are my own.        Rich Andrews
 They can be yours too.  Please send $19.95 to.....ihnp4!chinet!cabbie
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