Specifications

Little Board/P5i Technical Manual
3–30
3.18 SYSTEM I/O MAP
Table 3–10 lists the I/O port assignments used on the Little Board/P5i.
Table 3–10 I/O Map
I/O Address Function
03F8h - 03FFh Primary serial port
03F2h - 03F7h Floppy disk controller ports
3F2: FDC Digital output register
3F4: FDC Main status register
3F5: FDC Data register
3F7: FDC Control register
03F0h - 03F1h Ampro reserved
03E8h - 03EFh Third serial port
03D0h - 3DFh Video controller
03C0h - 03CFh Flat Panel/CRT VGA display adapter
03B0h - 03BFh Monochrome display adapter
0378h - 037Fh Primary parallel printer port
0320h - 033Fh Ethernet interface (default)
02F8h - 02FFh Secondary serial port
2F0h - 2F3h Ampro reserved
02E8h - 02EFh Fourth serial port
0278h - 027Fh Secondary parallel printer port
1F8h - 1FFh Ampro reserved
01F0h - 01F7h IDE hard disk interface
00F0h - 00FFh Reserved
00C0h - 00DFh DMA controller 2 (8237 equivalent)
00A0h - 00A1h Interrupt controller 2 (8359 equivalent)
0092h Fast A20 gate and CPU reset
0080h - 009Fh DMA page registers (74LS612 equivalent)
0070h - 0071h Real-time clock and NMI mask
0060h - 0064h Keyboard controller (8042 equivalent)
0040h - 0043h Programmable timer (8254 equivalent)
0020h - 0021h Interrupt controller 1 (8359 equivalent)
0000h - 000Fh DMA controller 1 (8237 equivalent)