Lance Tagliapietra wrote:

>>>>Lance Tagliapietra wrote:
>>>>
>>>>  
>>>>
>>>>        
>>>>
>>>I bought one of those $7 proms.  I have access to an S4 Dataman 
>>>programmer at work on the assumption that it can program those.
>>>I have not checked the docs for the programmer yet, but hope to
>>>this between the holidays as it should be a bit quieter then.
>>>
>>>As I recall, it should also be able to read out the contents of
>>>a prom.
>>>
>>>I'll report back after Christmas about this.
>>>      
>>>
>
>Reporting back: I checked the dataman web site, and even
>sent an email to their technical support.  Unfortunately,
>the S4 model does not support the 74S288 32x8-bit PROM.
>I was a bit disappointed at the news.  The next model
>program up from the S4 does support that part, but that
>is not the model to which I have access. 
>
>Even worse, I have not been able to locate any datasheets
>for the part.   I am not beyond building a programmer for
>the part, but the datasheet would be required.
>
>--Lance
>  
>
I suspected as much about the PROM programmer you mentioned. Alas.

As to datasheets, Jameco does have PDFs of the four-sheet electrical 
datasheet, but nothing in there about the programming algorithm. I 
gather from loose talk on the 'net that that's particularly critical.

Oh, well. I haven't made any progress recompiling the kernel driver to 
force an address into the stack, using Ignatios' recommended patch. The 
system keeps locking up during the compile process. (I'm guessing either 
a bank of marginal ZIPs in my A3000, or a SCSI command lockup, except 
I'm booting with "-I ff" so synchronous shouldn't be an issue. Frustrating.)

I'll keep plugging, I guess. I think I'll eventually settle for a 
soft-configurable (/etc/something) configuration, using (speculating 
here) maybe modifications to "ifconfig" to permit address changes in the 
"ether" address family, like Solaris. I'd love to find a way to program 
the appropriate part or replace it with something functionally 
equivalent. (A PAL/GAL?)

    >JS<