System information

Memory Maps
Memory Maps B-507
Table B-3 Cisco 2500 Memory Map
Address Description Comments
00000000–0017FFFF CPU and packet memory (DRAM) 1.5 MB
01000000–011FFFFF ROM monitor and system image code space (EPROM) 2 MB
02000000–02007FFF Configuration RAM 32 KB
02100000–0213FFFF Control registers and I/O devices Details follow
02110000 Control register 1 —
02110002 Control register 2 —
02110040 PROM cookie —
02110100 Status register —
02120040 Timer control register —
02130000–02130003 Ethernet controller —
02130000–0213000F Token Ring controller —
02130040–02130043 Serial controller —
02130080 Serial control register 1 —
02130081 Serial control register 2 —
Address Bit Width Description Comments
00000000–00FFFFFF 32 DRAM 2, 4, 8, or 16 MB
00000000–001FFFFF 32 DRAM 2 MB —
00000000–003FFFFF 32 DRAM 4 MB —
00000000–007FFFFF 32 DRAM 8 MB —
00000000–00FFFFFF 32 DRAM 16 MB —
00000000–001FFFFF 8/16 Boot Flash memory 1 or 2 MB, when Flash
memory PCMCIA card is
not installed
00000000–001FFFFF 16 Flash memory PCMCIA card Boot mode
01000000–011FFFFF 16 Boot EPROMs for ROM
monitor and RXBOOT images
1 or 2 MB ROM; 2 MB
Flash memory
01000000–011FFFFF 16 Flash memory PCMCIA card When installed
02000000–0201FFFF 8 Configuration NVRAM 32 or 128 KB
02000000–02007FFF 8 Configuration NVRAM (32 KB) —
02000000–0201FFFF 8 Configuration NVRAM (128 KB) —
02100000–0213FFFF 8/16 Onboard I/O registers and chips —
03000000–03FFFFFF 32 Flash memory RAM (SIMMs) 4, 8, or 16 MB
03000000–033FFFFF 32 Flash memory RAM (4 MB) —
03000000–037FFFFF 32 Flash memory RAM (8 MB) —
03000000–03FFFFFF 32 Flash memory RAM (16 MB) —