do 2517/18/19 use different memory than other 2500s?

I couldn't console into my 2519 from ebay, so I thought I'd see if the
ram and flash were any good, so I put them in a 2502. First it
reported bad ram, but still hung on flash with my good ram back in.

I know the 2519 boots up, because he lights blinked for self test, then
several ports flash looking for a connection, and I got a password
prompt on the aux port.

I found posts saying the console port wiring is different, but I
misplaced my rg45 cable crimper so instead of making a cable I tried
the other solution, setting jumpers to switch the con to the aux port,
but that did not work either.

Lastly, here is what I got when I put the ram and rom in a known good
2502. With ram and flash or just flash in my 2502p, all hung, some not
even putting out the copywrite message):

System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE
Copyright (c) 1986-1995 by cisco Systems
2500 processor with 4096 Kbytes of main memory

System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE
Copyright (c) 1986-1995 by cisco Systems
Bad memory - wrote zero, read 0x00000600 at location 0x000000EC

Hmmmm, since the 2518 only has one flash slot, maybe it can take a 16m
flash, and this is one, and that causes problems in a 2500? Maybe I
should try just the ram in the 2502 (although 4M or ram has no value to
me).

 

You may wish to investigate Cisco Router Memory Tables:

http://www.bradreese.com/cisco-router-memory-tables.htm

as well as the Refurbished Cisco Product Guide:

Page 48 PDF, Page 46 Document

Cisco 2500 Series

http://www.bradreese.com/refurbished-cisco-product-guide.htm

Sincerely,

Brad Reese
BradReese.Com® Cisco Resource Center
United Kingdom: 44-20-70784294
U.S. Toll Free: 877-549-2680
International: 828-277-7272
Fax: 775-254-3558
Website: http://www.BradReese.Com