📄 os-faq-pnp.html
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<html><head> <title>Operating Systems FAQ :: PNP</title> <link rel=stylesheet type="text/css" href="default.css"></head><body><TABLE border="0" width="100%"> <TR> <TD><H2><A name="prog_pnp">Where can I find programming info :: PNP</A></H2> </TD> </TR> <TR> <TD>You can get the official Plug-and-Play documentation from the Microsoft ftp site. These documents are .EXE (self extracting) MS-Word format files.<P>The documents are the industry (MS) specifications for PNP on BIOS, SCSI, Peripherals, etc.</P><P><A href="ftp://ftp.microsoft.com/developr/drg/Plug-and-Play/Pnpspecs/">ftp.microsoft.com/developr/drg/Plug-and-Play/Pnpspecs/</A></P><P>also Craig Hart has a good page on PNP programming at <A href="http://members.hyperlink.net.au/~chart/pnpinfo.htm">http://members.hyperlink.net.au/~chart/pnpinfo.htm</A></P> </TD> </TR></TABLE><p> <p><TABLE border="0" width="100%"> <TR> <TD><H2><A name="pnp_pmode">I heard you can do PNP BIOS calls in pmode?</A></H2> </TD> </TR> <TR> <TD>Yes, just like PCI bios32 calls you can do PNP calls in pmode. <p>Once you have the BIOS32 service directory (see PCI example routine) you can call it with the PNP Auto Config magic. <PRE> void bios32_scan_pnp_entry(void){ ULONG cseg_size, offset, base_addr; /* call the BIOS32 BSD for the PCI address BSD calls terminate in RETF not RET */ /* eax is loaded with "$ACF" magic */ asm("movl $0x46434124, %%eax\n" "lcall _bios32_call\n" : "=c" (cseg_size), "=d" (offset), "=b" (base_addr) : : "eax", "ebx", "ecx", "edx", "ebp", "memory" ); /* setup two new selectors of pnp_code32, pnp_data32, etc. */}</PRE>Once you have determined that PNP BIOS calls exist for pmode applications, you can call the PCI v2.0c+ calls (see INT 0x1A, function 0xB400 to 0xB407 in Ralf Brown's INT List).<p>Note, not many BIOS seem to support PNP Bios32 calls, so you may have to resort to using pmode16 calls directly tothe PNP bios (requiring a 286 TSS). </TD> </TR></TABLE></body></html>⌨️ 快捷键说明
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