[This file was provided by Wim Osterholt (2:512/56.198).]
 0000-001F ---- DMA 1   (first Direct Memory Access controller 8237)
 0010-001F ---- DMA controller (8237) on PS/2 model 60 & 80
 0018   w   PS/2 extended function register
 001A       PS/2 extended function execute
 0020-003F ---- PIC 1   (Programmable Interrupt Controller 8259)
 0022-002B ---- Intel 82355, part of chipset for 386sx
 0040-005F ---- PIT  (Programmable Interrupt Timer  8253, 8254)
 0060-006F ---- Keyboard controller (8041, 8042)  (or PPI (8255) on XT)
 0070-007F ---- CMOS RAM/RTC (Real Time Clock  MC146818)
 007C-007D ---- HP-Vectra  PIC 3   (Programmable Interrupt Controller 8259)
 0080   w   Manufacturing Diagnostics port
 0080-008F ---- DMA page registers   (74612)
 0090-009F ---- PS/2 POS (Programmable Option Select)
 00A0-00AF ---- PIC 2   (Programmable Interrupt Controller 8259)
 00C0     ----  TI  SN746496 programmable tone/noise generator  PCjr
 00C0-00DF ---- DMA 2   (second Direct Memory Access controller 8237)
 00F0-00F5 ---- PCjr Disk Controller
 00F0-00FF ---- coprocessor (8087..80387)
 0100-0107 ---- PS/2 POS (Programmable Option Select)
 0140-014F ---- SCSI (alternate Small Computer System Interface) adapter
 0140-0157 ---- RTC (alternate Real Time Clock for XT)   (1st at 0340-0357)
 0170-0177 ---- HDC 2   (2nd Fixed Disk Controller)   same as 01Fx (ISA, EISA
 01F0-01F7 ---- HDC 1   (1st Fixed Disk Controller)   same as 017x (ISA, EISA
 0200-020F ---- Game port reserved I/O address space
 0210-0217 ---- Expansion unit (XT)
 0240-0257 ---- RTC (alternate Real Time Clock for XT)   (1st at 0340-0357)
 0258-025F ---- Intel Above Board
 0278-027E ---- parallel printer port, same as 0378 and 03BC
 02A2-02A3 ---- MSM58321RS clock
 02B0-02DF ---- alternate EGA,  primary EGA at 03C0
 02C0-02Cx ---- AST-clock
 02E0-02EF ---- GPIB (General Purpose Interface Bus, IEEE 488 interface)
 02E0-02EF ---- data aquisition  (AT)
 02E8-02EF ---- serial port, same as 02F8
 02F8-02FF ---- serial port, same as 0378 and 03F8
 0300-031F ---- prototype cards
 0300-030F ---- Philips CR-ROM player CM50
 0320-0323 ---- XT HDC 1   (Hard Disk Controller)
 0330-0331 ---- MIDI interface
 0338     ----  AdLib soundblaster card
 0330-033F ---- Philips CR-ROM player CM50
 0340-034F ---- SCSI (1st Small Computer System Interface) adapter
 0340-0357 ---- RTC (1st Real Time Clock for XT), (alternate at 0240-0257)
 0348-0357 ---- DCA 3278
 0360-036F ---- PC network (AT)
 0370-0377 ---- FDC 2  (2nd Floppy Disk Controller 8272)  same as 03F0
 0378-037A ---- parallel printer port, same as 0278 and 03BC
 0380-038F ---- 2nd Binary Synchronous Data Link Control adapter (see 03A0)
 0390-039F ---- Cluster adapter (AT)
 03A0-03AF ---- 1st SDLC (Binary Synchronous Data Link Control adapter)
 03B0-03BF ---- MDA  (Monochrome Display Adapter based on 6845)
 03BC-03BF ---- parallel printer port, same as 0278 and 0378
 03BF   r/w Hercules configuration switch register
 03C0-03CF ---- EGA  (1st Enhanced Graphics Adapter)    alternate at 02C0
 03D0-03DF ---- CGA   (Color Graphics Adapter)
 03E8-03EF ---- serial port, same as 03F8
 03F0-03F7 ---- FDC 1  (1st Floppy Disk Controller 8272)  same as 0370
 03F8-03FF ---- serial port (8250, 8251, 16450, 16550), same as 02F8 and 0378
        Adresses above 03FF apply to EISA machines only !
 0401-04D6 ---- used by EISA systems only
 0461   r/w Extended NMI status/control register
 0481   r/w DMA channel 2 address byte 3 (high)
 04D0   w   IRQ 0-7 interrupt edge/level registers
 0620-0627 ---- PC network (adapter 1)
 06E2-06E3 ---- data aquisition (adapter 1)
 0790-0793 ---- cluster (adapter 1)
 0800-08FF ---- I/O port access registers for extended CMOS RAM or SRAM
 0A20-0A23 ---- Token Ring (adapter 1)
 0AE2-0AE3 ---- cluster (adapter 2)
 0C00   r/w page register to write to SRAM or I/O
 0C80-0C83 ---- system board ID registers
 1390-1393 ---- cluster (adapter 3)
 2100-210F ---- IBM XGA (eXtended Graphics Adapter  8514/A)
 2390-2393 ---- cluster (adapter 4)
 3220-3227 ---- serial port 3, description same as 03F8
 3540-354F ---- IBM SCSI (Small Computer System Interface) adapter
 4220-4227 ---- serial port, description same as 03F8
 42E0-42EF ---- GPIB (General Purpose Interface Bus, IEEE 488 interface)
 5220-5227 ---- serial port, description same as 03F8
 62E0-62EF ---- GPIB (General Purpose Interface Bus, IEEE 488 interface)
 82E0-82EF ---- GPIB (General Purpose Interface Bus, IEEE 488 interface)
 82F8-82FF ---- serial port, description same as 03F8
 A220     ????  soundblaster support in AMI Hi-Flex BIOS  ????
 A2E0-A2EF ---- GPIB (General Purpose Interface Bus, IEEE 488 interface)
 AFFF   r/w plane 0-3 system latch (video register)
 B220-B227 ---- serial port, description same as 03F8
 C220-C227 ---- serial port, description same as 03F8
 D220-D227 ---- serial port, description same as 03F8
 C2E0-C2EF ---- GPIB (General Purpose Interface Bus, IEEE 488 interface)
 E2E0-E2EF ---- GPIB (General Purpose Interface Bus, IEEE 488 interface)