API Networks CS20 Bad Memory or ROM

Skip to first unread message


Nov 13, 2012, 3:38:48 PM11/13/12

After my API Networks CS20 was sitting on my shelf unplugged for a couple years, I turned it on a couple days ago and received the following output on my serial console:


Bad Memory or ROM?
J14 J16 J18 J20(Bank0)
57 57 57 57
J15 J17 J19 J21(Bank1)
57 57 57 57.3f.06

I tried moving the eight RAM modules around (2GB installed) to different slots, removing all of them completely, putting a jumper across pins 1 and 2 on J2, replacing the 3V battery, but the bad memory message still appears. Typing a carriage return after that message above drops me to the SROM mini-debugger:

SLRP V02050202
Break (ff) from 00004740

From which I can run all the mini-debugger commands. As near as I can tell, I need to reflash the firmware, and the user's guide specifies that jumpers must be placed across pins 1/2 and 3/4 in J2 in order to "failsafe reflash from CDROM (COM1)". Here's where I am stuck. What should be on the CD? I burned the ISO hosted at:


to a CD-R with cdrecord under Linux, put the proper jumpers in place, but the "Bad Memory or ROM?" message still appears on boot with the CD-R in the drive, and I am still dropped to the SROM mini-debugger as before. I'm fairly certain that the CD-ROM drive functions, as the status LED on it flashes often during POST.

Any help is greatly appreciated. I'd love to get this guy back up and running.


Reply all
Reply to author
0 new messages