Brother International HL-1260 Service Manual - Page 140
Memory Map
View all Brother International HL-1260 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 140 highlights
3) The attached Printer SIMM map shows the memory map for 2 SIMMs combined. (6) ROM block ROMs store the CPU control program and font data. ROMs are two 16Mbit masked ROMs and two 8Mbit masked ROMs. Optional sockets are available for two 8Mbit EPROM (µPD27C8000DZ-120 - NEC or equivalent) for expansion. ROM access time should be less than 120nsec. 8Mbit EPROMs can be used instead of a 16Mbit masked ROM. (7) DRAM block DRAMs are used for receiving buffer or working area of the CPU. The DRAM block contains four 4Mbit DRAMs, thus having 2MB memory capacity in total. The refreshing method is CBR (Cas Before Ras). DRAM access time should be less than 80nsec. $0000-0000 $0400-0000 $0410-0000 $0800-0000 ROMOA, OB, 1A, 1B ROM1B Not used MIO MIO-EOT SELROM0(External battery terminal) $0000-0000 $003F-FFFF Program ROM (4MB) $0040-0000 $0060-0000 $007F-FFFF Font ROM (2MB) Optional ROM (2MB) SELROM1(External battery termial) $0C00-0000 FC (64 MB) $1000-0000 FC (64MB) $13C0-0000 $13E0-0000 Not used $1400-0000 Built-in RAM2MB IRASO $1800-0000 SIMM (max64MB) $1C00-0000 $1D00-0000 $1E00-0000 $1F00-0000 $1FFF-FFFF Reserve (64MB) ASIC internal register Gate Array (16MB) CDCC read buffer BOOT-ROM $1C00-0000 $1CFF-FFFF Soft Support Function Not used Timer Serial CDCC MED Relation Not used HRC/GSC Memory Wait Control Interrupt control Interrupt mask Memory bank LSB control LSB setting CPU write for LSB Not used Figure 3.2 Memory Map III - 3