235 lines
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235 lines
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<TITLE>Int 15/AH=C9h
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<META NAME="Description" CONTENT="
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Int 15/AH=C9h - Newer PS/2; various BIOSes - GET CPU TYPE AND MASK REVISION -
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AH = C9h
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AL = 10h (may be required on some non-PS BIOSes)
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Return: CF clear if successful
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AH = 00h
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CH = CPU type (see #00528)
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CL = mask revision (stepping level) (see #00529)
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CF set on error
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AH = status (80h,86h = function not supported)
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Notes: the BIOS must save DX at startup in order to be able to support this
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call; PS/2 Models 56, 57, 90, and 95 are known to support it
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<h2>Int 15/AH=C9h
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<h3><font color=#C00040>Newer PS/2; various BIOSes - GET CPU TYPE AND MASK REVISION</font></h3>
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<PRE>
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AH = C9h
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AL = 10h (may be required on some non-PS BIOSes)<br>
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<p><b>Return:</b><br>CF clear if successful
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AH = 00h
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CH = CPU type <a href="rb-1613.htm#Table528" tppabs="http://www.ctyme.com/intr/rb-1613.htm#Table528">(see #00528)</a>
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CL = mask revision (stepping level) <a href="rb-1613.htm#Table529" tppabs="http://www.ctyme.com/intr/rb-1613.htm#Table529">(see #00529)</a>
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CF set on error
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AH = status (80h,86h = function not supported)
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</PRE>
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<p><b>Notes:</b>
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The BIOS must save DX at startup in order to be able to support this
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call; PS/2 Models 56, 57, 90, and 95 are known to support it.
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The PS/2 BIOS merely reads CMOS locations 190h (type) and 191h (rev).
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IBM classifies this function as optional
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<p><b>See Also:</b>
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<a href="rb-1626.htm" tppabs="http://www.ctyme.com/intr/rb-1626.htm">AX=D100h</a> - <a href="rb-1667.htm" tppabs="http://www.ctyme.com/intr/rb-1667.htm">AX=DA92h</a> - MEM 0040h:00BCh
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<PRE>
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<p>
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<a name=table528></a>
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(Table 00528)
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Values for CPU type:
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03h 80386DX or clone
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04h 80486
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05h Pentium
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23h 80386SX or clone
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33h Intel i376
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43h 80386SL or clone
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A3h IBM 386SLC
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A4h IBM 486SLC
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<p>
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<a name=table529></a>
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(Table 00529)
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Values for stepping level:
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---i376 (type code 33h)---
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05h A0
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08h B
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---80386/80386DX (type code 03h)---
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03h Intel B1 to B10, Am386DX/DXL step A
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05h Intel D0
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08h Intel D1/D2/E1, Am386DX/DXL step B
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---80386SL (type code 43h)---
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05h A
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1xh B
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---80386SX (type code 23h)---
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04h Intel A0
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05h Intel B, Am386SX/SXL step A1
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08h Intel C/D1, Am386SX/SXL step B
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09h Intel 386CX/386EX/386SXstatic step A
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---80486DX (type code 04h)---
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00h Intel A0/A1
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01h Intel B2 to B6
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02h Intel C0
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03h Intel C1
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04h Intel D0
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10h Intel cA2/cA3, Cx486SLC step A
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11h Intel cB0/cB1
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---486DX2 (type code 04h)---
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02h Am486DX2 (unknown stepping)
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32h Intel DX2/Overdrive steps A0 to A2
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33h Intel DX2/Overdrive step B1
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---486SX (type code 04h)---
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20h Intel A0
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22h Intel B0
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27h Intel cA0
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28h Intel cB0
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---486SL (type code 04h)---
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40h Intel A
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---IntelSX2 (type code 04h)---
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5xh Intel A
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---IntelDX4 (type code 04h)---
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8xh Intel A
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---487SX (type code 04h)---
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20h Intel A0
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21h Intel B0
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---Pentium (type code 05h)---
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0xh Intel P5 steps Ax (1993)
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1xh Intel P5 steps Bx (1994)
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2xh Intel P54C step A
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---RapidCAD (type code 03h)---
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40h A
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</PRE>
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<p>
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<b>Category: <a href="cat-003.htm" tppabs="http://www.ctyme.com/intr/cat-003.htm">
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Bios</a>
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- <a href="int-15.htm" tppabs="http://www.ctyme.com/intr/int-15.htm">
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Int 15h</a>
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N</a>
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