protech PC-550, User Manual, Page: 91 / 106

Appendix B TECHNICAL SUMMARY
PC-550 USER
′
S MANUAL
Page: B-5
I/O & MEMORY MAP
Memory Map :
MEMORY MAP ASSIGNMENT
0000000-009FFFF System memory used by DOS and
application
00A0000-00BFFFF Display buffer memory for VGA/ EGA /
CGA / MONOCHROME adapter
00C0000-00DFFFF Reserved for I/O device BIOS ROM or
RAM buffer.
00E0000-00EFFFF Reserved for PCI device ROM
00F0000-00FFFFF System BIOS ROM
0100000-FFFFFFF System extension memory
I/O Map :
I/O MAP ASSIGNMENT
000-01F DMA controller (Master)
020-021 Interrupt controller (Master)
022-023 Chipset controller registers I/O ports.
040-05F Timer control regsiters.
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
2F8-2FF Serial port-2
360-36F Net work ports
378-37F Parallel port-1
3B0-3BF Monochrome & Printer adapter
3C0-3CF EGA adapter
3D0-3DF CGA adapter
3F0-3F7 Floppy disk controller
3F8-3FF Serial port-1