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34 Planar Clean Screen PC User’s Manual
Appendix B: Programming Interface
Memory Map
Range CPU address Region Cached
0 to 640K 00000000-0009FFFF DRAM yes
640K to 768K 000A0000-000BFFFF VGA memory no
768K to 816K 000C0000-000CBFFF Shadowed VGA BIOS yes
816K to 896K 000CC000-000DFFFF Unused — Available for ISA bus BIOS Setup
896K to 1M 000E0000-000FFFFF Shadowed System ROM BIOS yes
1M to 8M 00100000-007FFFFF DRAM yes
If no DRAM, ISA memory no
8M to 16M 00800000-00FFFFFF DRAM yes
If no DRAM, ISA memory no
16M to 32M 01000000-01FFFFFF DRAM yes
If no DRAM, ISA memory no
32M to 64M 02000000-03FFFFFF DRAM yes
If no DRAM, ISA memory no
64M to (4.0G–512K) 04000000-FFF7FFFF PCI bus/ISA bus alias no
Top 512K–16K FFF80000-FFFFBFFF System ROM BIOS no
Top 16K FFFFC000-FFFFFFFF Boot Block ROM BIOS no
Assigned and Available IRQs
Com2 Com1 Real IDE
Keyboard Cascade or or Touch Sound Floppy Time Numeric Hard
Timer Controller Interrupt Com4 Com3 LPT Screen Blaster Disk Clock Coprocessor Disk PCMCIA Available
IRQ0 D
IRQ1 D
IRQ2 D
IRQ3 DXX X
IRQ4 XDX X
IRQ5 XXDXX X
IRQ6 D
IRQ7 XXXXX X X
IRQ8 D
IRQ9 XXXXD X
IRQ10 DX
IRQ11 XXXXX XX
IRQ12 NOT AVAILABLE
IRQ13 D
IRQ14 DX
IRQ15 XXX
D
indicates factory default,
X
indicates optional or available IRQs
CS Manual LAYOUT#1787 3/9/98 5:33 PM Page 34