Filter
Top Products
Advanced/ZP Technical Product Summary • Page 18
Appendix D − Memory Map
Address Range (Decimal) Address Range (hex) Size Description
1024K-131072K 100000-8000000 127M Extended Memory
960K-1023K F0000-FFFFF 64K AMI System BIOS
952K-959K EE000-EFFFF 8K FLASH Boot Block (Available as UMB)
948K-951K ED000-EDFFF 4K ESCD (Plug and 'Play configuration area)
944K-947K EC000-ECFFF 4K OEM LOGO (available as UMB)
896K-943K E0000-EBFFF 48K BIOS RESERVED (Currently available as UMB)
800K-895K C8000-DFFFF 96K Available HI DOS memory (open to ISA and PCI bus)
640K-799K A0000-C7FFF 160K Available HI DOS memory (open to ISA and PCI bus)
639K 9FC00-9FFFF 1K Extended BIOS Data (moveable by QEMM, 386MAX)
512K-638K 80000-9FBFF 127K Extended conventional
0K-511K 00000-7FFFF 512K Conventional
Table D-1. Advanced/ZP Memory Map
The table above details the Advanced/ZE memory map. The ESCD area from ED000-EDFFF is not available for use as an
Upper Memory Block (UMB) by memory managers. The area from E0000-EBFFF is currently not used by the BIOS and is
available for use as UMB by memory managers. Parts of this area may be used by future versions of the BIOS to add
increased functionality.
Appendix E − Interrupts & DMA Channels
IRQ System Resource
NMI Unused
0 Reserved, Interval Timer
1 Reserved, Keyboard buffer full
2 Reserved, Cascade interrupt from slave PIC
3 Serial Port 2
4 Serial Port 1
5 Parallel Port 2
6 Floppy
7 Parallel Port 1
8 Real Time Clock
9 User available
10 User available
11 User available
12 User available
13 Reserved, Math coprocessor
14 Primary IDE if enabled, else available to user
15 Secondary IDE if enabled, else available to user
Table E-1.Advanced/ZP Interrupts
DMA Data Width System Resource
0 8- or 16-bits Open
1 8- or 16-bits Open - Normally used for LAN
2 8- or 16-bits Floppy
3 8- or 16-bits Parallel Port
4 Reserved - Cascade channel
5 16-bits Open
6 16-bits Open
7 16-bits ISA IDE
Table E-2. Advanced/ZP DMA Map