Technical Information 1-7n Blanks out the monitorPuts the video controller into sleep mode. The vertical sync clock and blanksignals to the monitor are disabled.n Forces the IDE devices into stand-by modeA suspend command is sent to the IDE devices which put the devices into astand-by mode.I/O AddressingThe processor communicates with I/O devices by I/O mapping. The hexadecimal (hex)addresses of I/O devices are listed in Table Section 1-5.Table Section 1-5 I/O Address MapAddress (Hex) I/O Device Name0000-000F DMA controller 1 (channel 0-3)0020-0021 Interrupt controller 10040-0043 Timer 10048-004B Timer 20060 Keyboard controller byte0061 NMI, speaker controller byte0064 Keyboard controller, CMD/STAT byte0070, bit 7 Enable NMI0070, bit 6:0 Real-time clock address0071 Real-time clock data0073 Reserved for system board Configuration0075 Reserved for system board Configuration (read only)0078 BIOS timer0080-008F DMA page register00A0-00A1 Interrupt controller 200C0-00DE DMA controller 2 (channel 4-7)00F0 Reset numeric error0170-0177 Secondary IDE channel01F0-01F7 Primary IDE channel0278-027B Parallel port 202F8-02FF Asynchronous communications port 2
