DM&P M6117D Hardware Reference
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Memory Mapping

Address Description
0000:0000-9000:FFFF System RAM
A000:0000-A000:FFFF EGA/VGA Video Memory
B000:0000-B000:7FFF MDA RAM, Hercules graphics display RAM
B000:8000-B000:FFFF CGA display RAM
C000:0000-C000:7FFF EGA/VGA BIOS ROM
C800:0000-E000:FFFF External ROM code. ROM-BIOS looks here (in 2K-block increments) for code to be executed at boot time.
D000:0000-E000:FFFF Expansion ROM space.
F000:0000-F000:FFFF Motherboard BIOS

I/O Mapping

I/O Address Owner
000h - 00Fh 8237 DMA Controller #1
020h - 021h 8259 Master Interrupt Controller
040h - 043h 8253 Programmable Timer
060h - 06Fh 8042 Keyboard Controller
070h - 07Fh RTC, NMI Mask Register
080h - 09Fh DMA Page Registers
0A0h - 0B1h 8259 Slave Interrupt Controller
0C0h - 0DFh 8237 DMA Controller #2
0F0h - 0F1h Math Coprocessor
0F8h - 0FFh Math Coprocessor
1F0h - 1F8h Hard Disk Controller #1
278h - 27Fh Parallel Printer
2E8h - 2EFh Serial Port
2F8h - 2FFh Serial Port
378h - 37Fh Parallel Printer
3B0h - 3BBh MDA Adapter
3BCh - 3BFh Parallel Printer
3C0h - 3CFh VGA/EGA Adapter
3D0h - 3DFh CGA Adapter
3E8h - 3EFh Serial Port
3F0h - 3F7h Floppy Controller #1
3F8h - 3FFh Serial Port

IRQ Mapping

IRQ# Usage
IRQ0 System Timer
IRQ1 Keyboard Controller
IRQ2 Cascade for IRQ8 - 15
IRQ3 Serial Port
IRQ4 Serial Port
IRQ5 LAN Card
IRQ6 Floppy Disk Controller
IRQ7 Parallel Port
IRQ8 Real Time Clock
IRQ9 Redirected to IRQ2
IRQ10 Unassigned
IRQ11 Unassigned
IRQ12 Mouse (if exist)
IRQ13 Math Coprocessor
IRQ14 Hard Disk Controller
IRQ15 Unassigned

Technical Support

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