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Appendix
A-1
EP-8KTA
Appendix A
A-1 MEMORY MAP
Address Range Size Description
[00000-7FFFF] 512K Conventional memory
[80000-9FBFF] 127K Extended Conventional memory
[9FC00-9FFFF] 1K Extended BIOS data area if PS/2 mouse is
installed
[A0000-C7FFF] 160K Available for Hi DOS memory
[C8000-DFFFF] 96K Available for Hi DOS memory and adapter
ROMs
[E0000-EEFFF] 60K Available for UMB
[EF000-EFFFF] 4K Video service routine for Monochrome &
CGA adaptor
[F0000-F7FFF] 32K BIOS CMOS setup utility
[F8000-FCFFF] 20K BIOS runtime service routine (2)
[FD000-FDFFF] 4K Plug and Play ESCD data area
[FE000-FFFFF] 8K BIOS runtime service routine (1)
A-2 I/O MAP
[000-01F] DMA controller.(Master)
[020-021] INTERRUPT CONTROLLER.(Master)
[022-023] CHIPSET control registers. I/O ports.
[040-05F] TIMER control registers.
[060-06F] KEYBOARD interface controller.(8042)
[070-07F] RTC ports & CMOS I/O ports.
[080-09F] DMA register.
[0A0-0BF] INTERRUPT controller.(Slave)
[0C0-0DF] DMA controller.(Slave)
[0F0-0FF] MATH COPROCESSOR.
[1F0-1F8 ] HARD DISK controller.
[278-27F] PARALLEL port 2.
[2B0-2DF] GRAPHICS adapter controller.