AS2511-RJ stuck in rommon

I was trying to do an ios upgrade on an older AS2511-RJ. Apparently the ios
version that I loaded is to big for this router to boot, it sees the image
and tries to load it, but then says insufficient memory and reboots. I need
to put the old ios image back on it but can't figure out how to do this. If
I send it a break during the reboot, I get the following menu and I am not
sure what to do from there. Does anyone have any insight on how to do this?

 SYSTEM INIT: INSUFFICIENT MEMORY TO BOOT THE IMAGE!

%Software-forced reload

Unexpected exception to CPU vector 34, PC = 31A9086

-Traceback= 31A9086 3190A3A 3192400 318CCEE 32983C4 3297BAA 31A54C8 31A5546
30EDA82 30EDC78

=== Flushing messages (00:00:12 UTC Mon Mar 1 1993) ===

Buffered messages:

Queued messages:

00:00:12: %SYS-3-LOGGER_FLUSHING: System pausing to ensure console debugging
output.

00:00:07: %LINK-3-UPDOWN: Interface Ethernet0, changed state to up
00:00:07: %LINK-3-UPDOWN: Interface Serial0, changed state to down
00:00:12: %SYS-2-MALLOCFAIL: Memory allocation of 10000 bytes failed from
0x318CCE6, alignment 0
Pool: Processor Free: 0 Cause: Not enough free memory
Alternate Pool: I/O Free: 1928 Cause: Not enough free memory

-Process= "Init", ipl= 4, pid= 3
-Traceback= 31909C6 3192400 318CCEE 32983C4 3297BAA 31A54C8 31A5546 30EDA82
30EDC78
System Bootstrap, Version 11.0(10c)XB1, PLATFORM SPECIFIC RELEASE SOFTWARE
(fc1)
Copyright (c) 1986-1997 by cisco Systems
2500 processor with 2048 Kbytes of main memory

%SYS-4-CONFIG_NEWER: Configurations from version 12.0 may not be correctly
understood.
Loading flash:/c2500-c-l.122-29b.bin .
Abort at 0x10E983C (PC)
>
>
>
>help
$ Toggle cache state
B [filename] [TFTP Server IP address | TFTP Server Name]
             Load and execute system image from ROM or from TFTP server
C [address] Continue execution [optional address]
D /S M L V Deposit value V of size S into location L with modifier M
E /S M L Examine location L with size S with modifier M
G [address] Begin execution
H Help for commands
I Initialize
K Stack trace
L [filename] [TFTP Server IP address | TFTP Server Name]
             Load system image from ROM or from TFTP server, but do not
             begin execution
O Show configuration register option settings
P Set the break point
S Single step next instruction
T function Test device (? for help)

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Received on Thu Sep 09 2010 - 09:36:39 ART