IBM 3301690 user manual 1st MB Memory Address Map, Table C-1 IO Address Map

3301690 CPU Card

C.1 IO Address Map

	I/O address
		Description
	Range
	000-01F	DMA Controller
020-021		Interrupt Controller
040-043		System time
	060-06F	Keyboard Controller
	070-07F	System CMOS/Real time Clock
	080-09F	DMA Controller
	0A0-0A1	Interrupt Controller
	0C0-0DF	DMA Controller
	0F0-0FF	Numeric data processor
	1F0-1F7	Primary IDE Channel
	2F8-2FF	Serial Port 2 (COM2)
	378-37F	Parallel Printer Port 1 (LPT1)
	3B0-3BB	Intel(R) 82915 Graphics Controller
	3C0-3DF	Intel(R) 82915 Graphics Controller
	3F6-3F6	Primary IDE Channel
	3F7-3F7	Standard floppy disk controller
	3F8-3FF	Serial Port 1 (COM1)
Table C-1: IO Address Map

C.2 1st MB Memory Address Map

Memory address	Description
00000-9FFFF	System memory
A0000-BFFFF	VGA buffer
F0000-FFFFF	System BIOS
1000000-	Extend BIOS

Table C-2: 1st MB Memory Address Map

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