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F8 Rom Sec Is BAD

EF ROM diags2e

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#1 Bloodnose OFFLINE  

Bloodnose

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Posted Sun Feb 19, 2017 12:19 PM

Using "Master Diagnostics IIe" (Diags2E.dsk from http://apple2online....ts/diags2e.zip)performing the "Motherboard ROM test" I receive "F8 Rom Sec is BAD".

I assumed this ROM was contained in the EF ROM chip, and swapping the chip with one from another board (same ROM part 342-0134-A) results in the same error.

 

The motherboard is a 1982 unenhanced Rev B, original chips.

 

I could not find documentation for "Master Diagnostics IIe".

 

Might this ROM code be located in another chip?

In case of a false positive report from this software, is there another utility known to test ROMs comprehensively?

Apple's "Apple IIe Diagnostics, V2.1" doesn't report an error during the "ROM/ CPU Test".

 

The system otherwise operates normally, except for the random wonky lock-up or dump to the monitor.

 

Attached File  F8 Rom Sec Is BAD 25%.JPG   83.87KB   2 downloads



#2 trash_44fr OFFLINE  

trash_44fr

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Posted Fri Feb 24, 2017 2:43 PM

Hello Bloodnose,

 

Using the Master Diagnostics IIe image in an emulator, I experienced exactly the same behaviour with an unenhanced //e. The ROM test is okay with an enhanced //e so your Apple is probably ok.

You can try the XPS diagnostics which works great with an unenhanced //e (but not with an enhanced one).

 

 

#3 Bloodnose OFFLINE  

Bloodnose

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Posted Thu Mar 2, 2017 1:56 PM

Thank you for the emulator idea.  It is a good comparison.

XPS diagnostics only tests the C0 and E0 ROMs.

I will keep looking for a diagnostic tool that is more comprehensive.



#4 Bloodnose OFFLINE  

Bloodnose

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Posted Thu Mar 2, 2017 2:26 PM

Thank you for the emulator idea.  It is a good comparison.

XPS diagnostics only tests the C0 and E0 ROMs.

I will keep looking for a diagnostic tool that is more comprehensive.

I found the "APPLE ][ DEALER SERVICE PROGRAMS" ftp://ftp.apple.asimov.net/pub/apple_II/images/disk_utils/diagnostics/Apple%20%5d%5b%20Dealer%20Service%20Programs.dsk

which tests the F8, and it passes.





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