Chapter 4: Address Selection - Acces 104-QUAD-8 User Manual

Chapter 4: Address Selection

The card occupies 32 bytes of I/O space. The card base address can be selected anywhere within the
I/O address range 100-3E0 hex. If in doubt of where to assign the base address, refer to the table below
and the FINDBASE program.
HEX RANGE USAGE
000-00F 8237 DMA Controller 1
020-021 8259 Interrupt
040-043 8253 Timer
060-06F 8042 Keyboard Controller
070-07F CMOS RAM, NMI Mask Reg, RT Clock
080-09F DMA Page Register
0A0-0BF 8259 Slave Interrupt Controller
0C0-0DF 8237 DMA Controller 2
0F0-0F1 Math Coprocessor
0F8-0FF Math Coprocessor
170-177 Fixed Disk Controller 2
1F0-1F8 Fixed Disk Controller 1
200-207 Game Port
238-23B Bus Mouse
23C-23F Alt. Bus Mouse
278-27F Parallel Printer
2B0-2BF EGA
2C0-2CF EGA
2D0-2DF EGA
2E0-2E7 GPIB (AT)
2E8-2EF Serial Port
2F8-2FF Serial Port
300-30F
310-31F
320-32F Hard Disk (XT)
370-377 Floppy Controller 2
378-37F Parallel Printer
380-38F SDLC
3A0-3AF SDLC
3B0-3BB MDA
3BC-3BF Parallel Printer
3C0-3CF VGA EGA
3D0-3DF CGA
3E8-3EF Serial Port
3F0-3F7 Floppy Controller 1
3F8-3FF Serial Port
Table 4-1: Hex Ranges
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Manual 104-QUAD-8