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Chook
Joined: 29 Oct 2008
Posts: 2250
Location: Australia
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 Posted: Sun Jun 21, 2009 9:44 am Post subject: IBM 486DLC/SLC cpus |
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Does anyone know much about these chips? There doesn't seem to be a lot of info around about them. I have two that are on small pcbs with a 387 socket. From the little info I can find, the one without the heatsink is a 486SLC2 20/40 and the one with a heatsink is a 486SLC3 20/60.
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General failure reading disk in drive A
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thomsonicus
Joined: 11 Dec 2007
Posts: 226
Location: Poland
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| Posted: Sun Jun 21, 2009 12:36 pm Post subject: |
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Built with complementary metal oxide semiconductor (CMOS) technology, the IBM 386SLC had a 161-square millimeter die. It was available with clock speeds of 16, 20, and 25 MHz. The 25 MHz model produced only 2.5 watts of dissipated power, making it specially well suited for laptops and other portable devices.
Despite the the fact that the SLC and DLC chips are bus compatible with i386SX and i386DX respectively, they can not be used as drop-in replacements as they are not pin-compatible.
IBM 486SLC
Is an improved version of the IBM 386SLC, based on the Intel core. IBM 486SLC featured 16Kb of L1 cache and the i486 instruction set. It had 1.349 mln. transistors and a 69mm² die. It was manufactured in 1992. It came in a 100-pin PQFP packge, with 33 MHz FSB speed. The 486SLC was also available in a clock-doubled version, the 486SLC2 (50,66 MHz), and later in a clock tripled-version, the 486SLC3 (60,75,100 MHz). It is suspscted the clock tripled 486SLC3 part did not in fact actually exist as a stand alone product. All known instances of 486SLC3 CPUs are reportedly in the 132pin PQFP packaging with the extra address lines not connected (a 486BL3 running in 16-bit mode).
IBM 486DLC (Blue Lightning)
The 486DLC is a fully 32-bit version of the 486SLC, with 1.4 mln transistors on the 82mm² die and 0.8µm CMOS. It came in a 132-pin QFP package. In July, 1993 IBM produced clock-doubled and clock-tripled versions of the chip, the 486DLC2 (486BLX2) and the 486DLC3 (486BLX3) respectively. The chips were available from 50 to 100 MHz and were sold by IBM only. IBM later marketed 168-pin PGA Blue Lightning 486 CPUs, but these are technically not related to earlier Blue Lightning models as they are based on the Cyrix CPU core. |
wikipedia
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Mixeur
Joined: 06 Jan 2005
Posts: 4038
Location: Sochaux, France
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Chook
Joined: 29 Oct 2008
Posts: 2250
Location: Australia
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| Posted: Sun Jun 21, 2009 10:18 pm Post subject: |
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The partnumber of the SLC3 is 61g2099.
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General failure reading disk in drive A
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Thu Mar 10, 2011 7:30 pm Post subject: |
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This maybe useful to others
| IBMMuseum wrote: | More detail on the IBM BIOS call, especially as it relates to PS/2s, is here. For the IBM CPUs based on the modified Intel 386SX codemask (there are both IBM and Intel copyright dates marked on the chips), the first character of the four hexadecimal digit CPUID will be 0xA.
The second digit is the CPU family ('3' for the 386SLC, and '4' for the 486SLC2 and 486SLC3).
Third digit is the amount of internal clock-multiplying ('0' for the 386SLC, '2' for the 486SLC2, and '3' for the 486SLC3).
Last digit is the core revision (usually '1' for the released 386SLC, '1' or '2' for the releases of the 486SLC2, denoting an 'A' or 'B' step respectively, and typically '9' for the released 486SLC3). |
from this Computer forum thread
http://www.vintage-computer.com/vcforum/showthread.php?23678-Valuepoint-processor-upgrades&p=171022#post171022
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http://www.x86-guide.net/Neon-WA/en/collection.html |
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