AppendixA Technical Specifications
Product Architecture
A-8
Cisco 12404 Internet Router Installation and Configuration Guide
OL-11636-01
The MBus connection allows the GRP to download a system bootstrap image,
collect or load diagnostic information, and perform general, internal system
maintenance operations. The GRP plugs into any slot in the card cage in the
Cisco 12404 Internet router. The router is shipped with 20MB of Flash memory
as the default configuration.
GRP Memory
Memory components of the GRP are listed in Table A -4.
TableA-4 GRP Memory Components
Type Size Quantity Description
DRAM 641 to 256 MB
1. 64 MB of DRAM is the default DRAM configuration for the GRP.
1 or 2 64- or 128-MB DIMMs (based on DRAM required) for
main Cisco IOS software functions.
DIMM 3.3-volt, 60 nanosecond device
SRAM 512 KB
(fixed)2
2. SRAM is not able to be upgraded or configured.
SRAM for secondary CPU cache memory functions.
NVRAM 512 KB
(fixed)3
3. NVRAM is not able to be upgraded or configured.
Nonvolatile random-access memory (NVRAM) for the
system configuration file.
Flash Memory
(SIMM)4
4. SIMM socket is wired for a Cisco design and does not accept industry-standard 80-pin Flash SIMMs.
8 MB 1 Contains Cisco IOS software images and other
user-defined files on the GRP.
Flash Memory
(card)
20 MB5
5. 20-MB Flash memory card is the default shipping configuration for the Cisco 12404 Internet router.
Up to 2 Contains Cisco IOS software images and other
user-defined files on up to two PCMCIA-based Flash
memory cards.
Flash boot
ROM
512 KB 1 Flash EPROM for the ROM monitor program boot
image.