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lec03_zlab1diy - Traditional DIY approach DIY approach Do...

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1 Traditional DIY approach DIY approach Do everything by yourself – Design hardware CPU, Peripherals I/O and Memory address mapping – Entire software ROM Bios or Monitor program Interrupt processing Application functions In charge of entire CPU control flow
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2 com1 Video adaptor RTC 8253 8259 1 K Interrupt Vector Table Expansion Card BIOS System BIOS Video RAM HW Config. (x86 PC) 0x00000000 1M=0x000fffff Up to 4 G =0xffffffff 0x00010000 0x00020000 0x00030000 0x00040000 0x00050000 0x00060000 0x00070000 0x00080000 0x00090000 0x000a0000 0x000b0000 0x000c0000 0x000d0000 0x000e0000 0x000f0000 32 bit protected mode addressing area Start at 0x000ffff0 0x000 Video adaptor 8259 IRQ controller 0x020 0x030 8253 Interval Timer 0x040 mc146818 RTC 0x070 0x3C0 COM1 0x3f8 References Detail mapping and control is each component specific For more details, refer Memory map: http://www.osdata.com/system/physical/memmap.htm http://savage.net.au/Ron/html/hex-ram-tutorial.html Port map: http://members.tripod.com/~oldboard/assembly/ports.html CMOS RTC: http://members.tripod.com/~oldboard/assembly/cmos_ram.html http://sunsite.lanet.lv/ftp/mirror/x2ftp/msdos/programming/serial/rtc VGA Adaptor: http://www.osdever.net/FreeVGA/vga/vga.htm
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3 Boot sequence (PC)
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