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- Xref: sparky comp.os.msdos.programmer:11762 comp.os.msdos.misc:6817 comp.sys.ibm.pc:1062
- Path: sparky!uunet!stanford.edu!apple!netcomsv!cruzio!aki
- From: aki@cruzio.santa-cruz.ca.us
- Newsgroups: comp.os.msdos.programmer,comp.os.msdos.misc,comp.sys.ibm.pc
- Subject: BIOS and how to determine your CPU type
- Keywords: BIOS CPUID INT15H
- Message-ID: <4845@cruzio.santa-cruz.ca.us>
- Date: 3 Jan 93 00:35:49 GMT
- Sender: aki@cruzio.santa-cruz.ca.us
- Reply-To: aki@cruzio.santa-cruz.ca.us
- Lines: 53
-
-
-
- Browsing through Ralf's interrupt list I noticed that some new
- BIOS chips return the CPU type and revision numbers via
- INT 15H AX=C910H.
-
- I would like to see how many have this function available and
- what type of data the call returns. If you have a 386SX+ system,
- please uudecode the program below and run it.
-
- The program (INT15C9.COM) returns three lines of data with the
- contents of the AH, CH and CL registers. AH is 00 if the call
- was successful (otherwise it's usually 86 for invalid command).
- CH indicates the CPU type, which is 3 for 386 and 4 for 486
- (I imagine 5 would be 586). CL contains the revision number for
- the design. Typical values are 30-3F = 486 Overdrive and 23=386SX.
-
- If you run the program and AH is 00, i.e. your BIOS did support
- the call, PLEASE e-mail, mail, fax or phone in your results.
- I would like to know:
-
- a) CH and CL register contents as you can see them on screen
- (for example: 04 03)
- b) Your BIOS make and if you know it, the date
- (for example: AMI 09/12/92)
- c) Your computer make and model (if not "Noname")
- (for example: IBM PS/2 M56)
- d) What CPU you actually have _and_ the clock frequency
- (for example: 50MHz 486DX2)
-
- I will post a summary of responses (nicely tabulated, etc.)
- for everyone to enjoy if I get lots of replies. Otherwise
- expect a summary by e-mail.
-
- *THANK YOU* for your help.
-
- Aki.
-
- PS. Please, if you make a follow-up to this message, LIMIT
- the number of newsgroups. I will cross-post this to several
- newsgroups.
-
- ----CUT HERE (if you want to; you probably don't have to)----
- begin 644 int15c9.com
- MM`FZ5P'-(;@0R3/)S151BL2Z9`'H%`!948K%NF@!Z`H`68K!NFP!Z`$`PU"T
- M"<TA6%"Q!-+H)0\`Z`\`6"4/`.@(`+0)NF$!S2'#NW`!`]B*%[0"S2'#24Y4
- F,34O0SDQ,`T*)$%,/21#2#TD0TP])#`Q,C,T-38W.#E!0D-$148`
- `
- end
- ----CUT HERE----
- --
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