Epson ActionDesk 4000 Product Information Guide - Page 7

Epson ActionDesk 4000 System Memory Map 000FFFFFFh 000FF0000h OOOFEOOOOh System BIOS ROM: 84KB Duplicated from OFOOOOh Resewed for system board: 84KB Duplicated from OEOOOOh Extended memory 64MB (Maximum system memory) 001OOO0Oh 1MB OOOFOOOOh System BIOS ROM: 84KB Default Shadow RAM duplicated at FFOOOOh OOOC8O0Oh OOOCO0OOh 000B8000h OOOBOOOOh OOOAOOOOh Unused or l/O expansion ROM: 160KB Reserved for ROM on l/O adapters VGA BIOS ROM: 32KB Default Shadow RAM VGA text (color): 32KB Unused or VGA text (monochrome): 32KB Video memory: 64KB Reserved for graphics display buffer 640KB Conventional system memory: 640KB 00000000h System l/O Address Map Hex address 000-01F 020 - 03F 022 - 024 040 - 05F 080-08F 070 - 07F (CMOS) 080 - 09F 1 OAO-0BF 084, 0BB 0BC OCO - ODF OF0 OF1 0F8 - 0FF 1 Assigned device 1 DMA controller 1,8237 lnterrupt controller 1,8259, master Chip set configuration register Timer, 8254 Keyboard controller, 8042 Real-time clock NMI (non-maskable Interrupt) mask DMA page register, 74LS612 1 Interrupt controller 2,825QA 1 AD12 control register 1 AD12 control register DMA controller 2,8237 Clear math coprocessor busy Reset math coprocessor Math coprocessor Information Reference List Engineering Change Notices None. Technical Information Bulletins None. Product Support Bulletins None. Related Documentation TM-ACTD4 Epson ActionDesk 4000 Service Manual PL-ACTD4 Epson ActionDesk 4000 Parts Price List 4002497 Epson ActionDesk 4000 User's Guide 9/15/93 Epson ActionDesk 4000-7