System Interrupts; Dma Mapping - Xycom CHIP4e+ User Manual

Panel Type
Sharp TFT 421/344
Kyocera STN
Kyocera STN
Sharp TFT
Kyocera STN
Sharp TFT

System Interrupts

Table 0-3 describes the interrupts used on the CHIP4e+.
The BIOS setup menu controls the serial and parallel port interrupts. You can map
the two serial ports to any two of the following interrupts: 3, 4, 10, or 11. The
defaults are interrupts 3 and 4. This leaves IRQ10 and IRQ11 unused. You can map
the parallel port to IRQ5 or IRQ7.

DMA Mapping

DMA
Table 0-2. Jumper-Selectable Panel Type
640x480
+5V
640x480
+5V
1024x768
+5V
1024x768
+5V
800x600
+3.3V
800x600
+3.3V
Table 0-3. System Interrupts
Interrupt Function
IRQ0 System Timer
IRQ1 Keyboard
IRQ2 Cascade
IRQ3 Serial Port*
IRQ4 Serial Port*
IRQ5 Parallel Port*
IRQ6 Floppy Controller
IRQ7 Parallel Port*
IRQ8 Real-Time Clock
IRQ9 Unused
IRQ10 Serial Port*
IRQ11 Serial Port*
IRQ12 Mouse Port
IRQ13 Math Coprocessor
IRQ14 Fixed Disk
IRQ15 Unused
*BIOS setup controlled
Table 0-4. DMA Channels
Function
J7 J9 J10 J11
A B B B
A A B B
A B A B
A A A B
B B B A
B A B A
15