Compaq Presario 1900 Series, Maintenance & Service Guide, Models: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and

System DMA

United States April 15, 1999

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Maintenance & Service GuidePresario 1900 SeriesModels: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and 1925

Home Page Notice Preface Product Description Troubleshooting Illustrated Parts Catalog Removal & Replacement Procedures Specifications Pin Assignments Battery Pack Operations

System I/O Address

I/O Address	System Function (Shipping Configuration)
0000 – 000F	Direct Memory Access Controller
0020 – 0021	Programmable interrupt controller
0040 – 0043	System timer
0060 – 0060	Standard 101/102-Key or Microsoft Natural Keyboard
0061 – 0061	System speaker
0064 – 0064	Standard 101/102-Key or Microsoft Natural Keyboard
0070 – 0071	System CMOS/real time clock
0081 – 008F	Direct memory access controller
00A0 – 00A1	Programmable interrupt controller
00C0 – 00DF	Direct memory access controller
00E0 – 00E1	Motherboard Resources
00F0 – 00FF	Numeric Data Processor
0170 – 0177	Intel 82371AB/EB PCI Bus Master IDE Controller
01F0 – 01F7	Intel 82371AB/EB PCI Bus Master IDE Controller
0201 – 0201	Gameport Joystick
0274 – 0277	IO read data port for ISA Plug and Play enumerator
0376 – 0376	Intel 82371AB/EB PCI Bus Master IDE Controller
0378 – 037F	Printer Port (LPT1)
03B0 – 03BB	NeoMagic NMG5 Graphics Controller
03C0 – 03DF	NeoMagic NMG5 Graphics Controller
03F0 – 03F5	Standard Floppy Disk Controller

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