kdj11-sd eproms

Eric Josephson ericj at speakeasy.org
Sat Mar 5 22:29:19 CST 2005


I recently attempted to modify a decserver board
to use the 11/53 roms.  I installed the pullup and
burned the images into a pair of am27128A-2dc eproms,
but when I powered up the board it couldn't pass test
#1 with the "KDJ11-D/S 1.00" message.

I reverified the contents of the eproms and thought
that I must've damaged the board when installing the
pullup.  Just to be sure though, I remapped the 11/53
images with "cat 261E5.bin 261E5.bin > 1.bin",
"cat 262E5.bin 262E5.bin > 2.bin", then erased the
original 27256's and burned the new images into them.
After reinstalling these I powered up, and the board
came up okay:

	9 8 7 6 5 4 3 2 1

	Commands are Help, Boot, List, Map, Test and Wrap.
	Type a command then press the RETURN key:

So my question is, did I botch the pullup install
or did I use the wrong eproms?  What eproms should
work in the kdj11-sd?  The originals were am27256dc.

My next step is to test a teac fd55gfr 149-u5 floppy
drive for use as an rx33.  It appears to have the
correct jumpers, but I haven't seen it listed as
one known to work.  Can anyone confirm whether
this model can be configured as an rx33?

Thanks,

--
Eric Josephson



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