IBM 6400-I15 Maintenance Manual - Page 226

CMX Controller Board CAUTION: Do not remove or replace the NVRAM. The NVRAM contains a lithium battery that can explode if it is replaced incorrectly. NVRAM is replaced only at the factory. Bank 1 Bank 0 Bank 1 Bank 0 Notch Latch 1 2 3 Latch Flash Memory: 80-pin SIMM J11 = Bank 0 Must always be filled J10 = Bank 1 Reserved for upgrades DRAM: 72-pin SIMM Security PAL* J16 = Bank 0 (must always be filled) 1MB SIMM standard in LP+ option J15 = Bank 1 Reserved for upgrades If 1 Flash SIMM, use Bank 0 If 2 Flash SIMMs, use both banks, but be sure to place pre-programmed SIMMs in the marked location If 1 DRAM SIMM, use Bank 0 If 2 DRAM SIMMs, use both banks (It does not matter which SIMM goes into which bank) IMPORTANT: No matter what combination of SIMMs is used, J11 and J16 must always be filled. Flash SIMMs from one CMX controller must be placed in the same slots on another controller board. * Security PAL, Base: 14H5509 Security PAL, Graphics: 14H5490 Blank SIMMs: 1MB Flash - 14H5539 2MB Flash - 14H5540 1MB DRAM - 14H5499 2MB DRAM - 14H5481 4MB DRAM - 14H5508 Minimum Memory Requirements: 050, P50, 010, P10, 015 Datastream ASCII ASCII IGP Code V CTA CTA IGP Code V IPDS CTA IPDS CTA IGP Code V Flash Memory 2 MB 2 MB 2MB 2MB 2 MB 3 MB DRAM CT Board Installed Security PAL Vendor P/N 2 MB 3 MB 2MB 3 MB 6 MB 8 MB No No Yes Yes Yes Yes 154143-002 154143-001 154143-002 154143-001 154143-002 154143-001 (14H5509) (14H5490) (14H5509) (14H5490) (14H5509) (14H5490) Figure 34. Memory Modules and Security PAL 226 Replacement Procedures and Illustrated Parts List