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Topic: 486DLC

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	Diamond Technologies 486DLC-40, MicroExpress ME 486DLC/40
		At the heart of these two powerhouses is one of the latest Intel-compatible chips to hit the scene, the Cyrix 486DLC microprocessor.
		The 486DLC has a 2K cache, and performance is reduced as a result.
		If you're considering a 486DLC, you'd be well advised to ask the vendor if the system was designed around the chip.
	www.atarimagazines.com /compute/issue151/114_Diamond_Technologies.php (1044 words)

	[No title] (Site not responding. Last check: 2007-10-16)
		In existing 386 systems, DMA transfers (such as those performed by a SCSI controller or a sound board) may force the internal cache of the 486DLC to be flushed as the only means available in a 386 system to enforce consistency between the contents of the on-chip cache and external memory.
		To be on the safe side, the 486DLC should best be used with the Cyrix 387+ (its "Europe-only" name) or with the identical Cyrix 83D87 (US-bound chips manufactured after October 1991): these are not only the highest performing 387 coprocessors on the market, but they also work properly even with the first generation 486DLC.
		With the internal cache enabled, integer performance of the 486DLC can be up to 80% higher compared with a Intel 386DX at the same clock frequency, with the average speed gain for integer applications being 35%.
	www.textfiles.com /computers/cpucmp14.txt (4238 words)

	[No title]
		Although current 386 systems ignore these signals (since they are not defined for the Intel 386DX), future systems designed with the Cyrix chip in mind may take advantage of them and thereby gain increased performance.
		According to Cyrix, this problem only occurs with the first revision of the 486DLC and is fixed on newer ones.
		Compared with the Intel 486DX, the Cyrix 486DLC provides about 70% of the integer performance and about 50% of the floating point performance at the same clock frequency.
	www.anomalies.net /archive/ftp_archives/ftp.mc.hik.se/wiretap-library/Techdoc/Cpu/cyrix.pf (4051 words)

	Reference.com/Encyclopedia/Cyrix Cx486DLC
		The 486DLC can be described as a 386DX with the 486 instruction set and 1K of onboard L1 cache added.
		While some advertisements in PC magazines from smaller manufacturers touted the superiority of their 486DLC over name-brand computers sporting a 486SX, in reality the only advantage the 486DLC offered over the 486SX was the ability to add an inexpensive math coprocessor.
		The 486DLC did not see widespread use among large OEMs, but it was widely known among the hardware enthusiast community that an AMD 386DX-40 or Cyrix 486DLC-33 could keep up with a 486SX-25 at a lower cost, so it gained a small following among budget-minded enthusiasts.
	www.reference.com /browse/wiki/Cyrix_Cx486DLC (431 words)

	Red Hill motherboards
		They are hopelessly off the performance pace now, of course, and unable to run any present-day software, but they were very competitive in their time and to this day remain the simplest, most fuss-free boards we ever worked with.
		In reality this was not so: most DLCs came in PGA form and were sold as individual chips, where the vast majority of 386 parts were surface mounted onto the motherboard at the factory and sold as a unit.
		Clockwise from bottom left: a large empty socket; the 486DLC (you could put a 386DX there instead if desired); the 496SLC chip itself; and two sets of silver pads for factory mounting of a PQFP (surface mounted) CPU, which could be either 386DX (the small inner set of pads) or 486SX.
	www.redhill.net.au /b/b-94.html (1550 words)

	Cyrix Cx486DLC - Wikipedia, the free encyclopedia
		The 486DLC can be described as a 386DX with the 486 instruction set and 1K of onboard L1 cache added.
		Because of the slower 386 bus and the smaller L1 cache, the 486DLC could not compete on a clock-for-clock basis with the 486SX, but a 33 MHz 486DLC could keep pace with a 25 MHz 486SX, cost less, and offered the ability to upgrade further with the addition of an inexpensive math coprocessor.
		While some advertisements in PC magazines from smaller manufacturers touted the superiority of their 486DLC over name-brand computers sporting a 486SX, in reality the only advantage the 486DLC offered over the 486SX was the ability to add an inexpensive math coprocessor.
	en.wikipedia.org /wiki/Cyrix_Cx486DLC (408 words)

	Actix Graphics Engine 32 - Review
		By comparison with an Accelerator card, a 25 MHz 386DX chip was replaced with a 486DLC chip during the evaluation period.
		The 486DLC chip gave a 56 percent improvement in the Norton Sl rating, while the Landmark rating showed an improvement of 112 percent.
		Video response was improved with the 486DLC chip due to the increased processing power of the CPO.
	www.melbpc.org.au /pcupdate/9304/9304article4.htm (1273 words)

	CPU Guide: 386DX-40 and competitors
		Where the Intel 486 (the original, in later days called the 486DX) was essentially a fast 386 with the 387 maths co-pro built in, and the Intel 486SX was the same thing with the co-pro artificially disabled, the 486DLC was a fast 386 with the co-pro mounted on a separate chip.
		It was very cheap for a 50MHz CPU and was mostly sold by low-rent retailers who hoped that no-one would notice it was not in anything like the same performance class as a DX-50.
		Pitted against the mainstream 486SX-33 and 486DLC products of the day, the 16-bit, 25MHz bus of the SLC was a handicap, but the chip could hold its own.
	www.redhill.net.au /c/c-4.html (2703 words)

	Red Hill motherboards
		They are hopelessly off the performance pace now, of course, and unable to run any present-day software, but they were very competitive in their time and to this day remain the simplest, most fuss-free boards we ever worked with.
		In reality this was not so: most DLCs came in PGA form and were sold as individual chips, where the vast majority of 386 parts were surface mounted onto the motherboard at the factory and sold as a unit.
		Clockwise from bottom left: a large empty socket; the 486DLC (you could put a 386DX there instead if desired); the 496SLC chip itself; and two sets of silver pads for factory mounting of a PQFP (surface mounted) CPU, which could be either 386DX (the small inner set of pads) or 486SX.
	redhill.net.au /b/b-94.html (1550 words)

	Mystery 386/286 "Tomato board" - The Vintage Computer Forums
		The socket that you believe to be for 286 CPUs is most likely for a 387 math coprocessor, which use the same sockets as 286 processors.
		The reason that you cannot find a 486 socket on the board is because the 486DLC used a 386 pinout.
		Typically a 486DLC will not function correctly in a standard motherboard and a 486DLC BIOS is required.
	www.vintage-computer.com /vcforum/showthread.php?t=1294 (293 words)

	CPU Guide: 386DX-40 and competitors
		Where the Intel 486 (the original, in later days called the 486DX) was essentially a fast 386 with the 387 maths co-pro built in, and the Intel 486SX was the same thing with the co-pro artificially disabled, the 486DLC was a fast 386 with the co-pro mounted on a separate chip.
		It was very cheap for a 50MHz CPU and was mostly sold by low-rent retailers who hoped that no-one would notice it was not in anything like the same performance class as a DX-50.
		Pitted against the mainstream 486SX-33 and 486DLC products of the day, the 16-bit, 25MHz bus of the SLC was a handicap, but the chip could hold its own.
	redhill.net.au /c/c-4.html (2703 words)

	Driver museum [System utilites] (Site not responding. Last check: 2007-10-16)
		CPU ID this program determines the type of processor you have, also checks out for pentium bug.
		Program to enable the internal cache in cyrix 486DLC processors.
		Use this program to enable the cache if you are upgrading 386 board with 486 DLC processor
	www.drivermuseum.com /files/utils/system_u.html (87 words)

	[No title]
		I would guess that busmastering DMA boards are the main ones that cause trouble with the external cache on older boards like mine, though I don't really know.
		You may not want this patch If you have a motherboard with working external cache, or one that supports the Cyrix 486DLC directly, or you have a 486DRx2 or 486SRx2, then this patch is probably of little interest to you.
		When there is a DMA transfer, the memory cache has to be flushed, or else the peripheral and the CPU will have different ideas about what is in memory.
	www.tux.org /pub/sunsite/kernel/patches/linux.cxpatch (1568 words)

	Computing.Net - 486dlc bus speed
		I'm looking to upgrade a 386 system with a 486DLC (a budget 486 that fits into 386 motherboards).
		For those who are curious I can report that it does work.
		The 486DLC is a cheap upgrade for 386 owners.
	www.computing.net /hardware/wwwboard/forum/41023.html (273 words)

	PC Enterprises' Genesis\PC Expansion Options (IBM PS/2 and EduQuest Upgrade Motherboards) (Site not responding. Last check: 2007-10-16)
		This option is not shipped with most Genesis\PC motherboards but is available upon request to existing owners or with new orders.
		The 486DLC and 486 SXL series of Genesis\PC motherboard upgrade did not come with a math coprocessor.
		The 40Mhz 486DLC and 50MHz Genesis\PC SXL series of Genesis\PC motherboard upgrade did not come with external cache.
	www.pccomponentscompany.com /catps2/genopt.htm (776 words)

	Cyrix - Wikipedia, the free encyclopedia
		It was the fastest 387-compatible coprocessor and provided up to 50% more performance than the Intel 387DX.
		Its early CPU products included the 486SLC and 486DLC, released in 1992, which, despite their names, were pin-compatible with the 386SX and DX, respectively.
		While they added an on-chip L1 cache and the 486 instruction set, performance-wise they were somewhere between the 386 and the 486.
	en.wikipedia.org /wiki/Cyrix (2006 words)

	i386/3460: Cyrix 486DX2/66 mis-identified as 486DLC
		This may or may not be a problem, depending on OpenBSDs internal usage of the information (workarounds for 486DLC cache stuff?) - installation seems to work fine, though.
		The Cyrix/TI 486DLC is an upgrade for 386DX boards with 1K internal cache and some other features, no internal FPU.
		OpenBSD 3.4 (RAMDISK) #121: Sat Sep 6 03:58:09 MDT 2003 deraadt@i386.openbsd.org:/usr/src/sys/arch/i386/compile/RAMDISK cpu0: Cyrix 486DLC (486-class) WARNING: CYRIX 486DLC CACHE UNCHANGED.
	www.monkey.org /openbsd/archive/bugs/0309/msg00098.html (123 words)

	Obsession
		This board was designed for the 486DLC upgrade chip.
		Even though I have an extra 486DLC I'm going to keep this a 386.
		Remember the day you had a card for the floppy and Winchester interface.
	www.vulcanjedi.com /obsession.htm (286 words)

	[No title] (Site not responding. Last check: 2007-10-16)
		Date: 21 Apr 93 20:03:23 EDT Organization: Harvard University Science Center Lines: 43 In case anyone was wondering about upgrading their 386 or 486 class machine without spending a lot of money, I looked into replacing the processor on those machines and here are the facts (as I understand them).
		If you have a PS/2 Model 70 or Model 80, you can replace the i386 chip with either 1) a Cyrix 486DLC chip for $130 which will increase your processing power by about 60% for normal fuctions, and not at all for math functions.
		This chip will only run at your original clock speed, ie.
	www.cs.cmu.edu /afs/cs.cmu.edu/project/theo-11/www/naive-bayes/20_newsgroup/comp.sys.ibm.pc.hardware/60865 (478 words)

	COMMENT
		I've got the binary for DOS, but I've seen where someone's selling the upgrade kit on e-bay and they say they've got the binary/source for Windows, DOS and Unix.
		They are based on the Cyrix 486DLC and are the same form factor as a 386 CPU.
		They have a 486 command set and a small L1 cache.
	www.driverguide.com /boards/miscellaneous6/399.html (870 words)

	[BL] LPrinting with BasLinux 3.2
		> > The 486DLC was a Citrix procesor, similar to a 386DX.
		My partner thinks SLC is lower power than SX and therefore is used in laptop computers.
		> >> On Thu, 8 Jan 2004, Alejandro Lieber wrote: > ^^^^ > I forgot to correct the year in a small program, as > this 486DLC is not Y2K compliant.
	lists.ibiblio.org /pipermail/baslinux/2005-January/006256.html (470 words)

	[No title] (Site not responding. Last check: 2007-10-16)
		Date: Wed, 21 Apr 93 13:24:36 GMT Lines: 11 To all netters, In my last post that concerning about the CYRIX 486DLC CPU, I said the benchmark program COMPTEST stated there is a bug in CYRIX CPUs.
		This is NOT true and I must apologize to the author of COMPTEST.
		The report stated there is a bug in the Cx486SLC but not DLC.
	www.cs.cmu.edu /afs/cs.cmu.edu/project/theo-11/www/naive-bayes/20_newsgroup/comp.sys.ibm.pc.hardware/60824 (101 words)

	Re: OpenBSD on 486 - Problem?
		Supposedly, the > ST468DX4 is the same as a Cyrix Cx486DX4-QP (I think - there aren't too many > resources on these on the web).
		> OpenBSD, however, recognises it as a Cyrix 486DLC and writes out a warning: > > OpenBSD 2.6 (GENERIC) #696: Tue Nov 2 01:46:05 MST 1999 > deraadt@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC > cpu0: Cyrix 486DLC (486-class) > WARNING: CYRIX 486DLC CACHE UNCHANGED.
		I'm > just a bit surprised, as the 486DLC was some kind of 386/486 hybrid, > whereas the ST486 is a "true" 486...
	www.monkey.org /openbsd/archive/misc/0010/msg01939.html (484 words)

	NetBSD/i386 Frequently Asked Questions
		When enabled you will usually see the 'Serial Controller' listed with an IRQ on the BIOS screen just before it starts booting NetBSD.
		This message indicates the kernel has detected a Cyrix 486DLC and since it does not know if it is safe on this machine, the Cyrix special cache settings have not been touched.
		This should only affect the Cyrix '386/486 hybrid' upgrade for 386 motherboards, and should not apply in any way to true 486 (or later) processors from any vendor, including Cyrix.
	www.netbsd.org /Ports/i386/faq.html (4024 words)

	Distinguishing 386SX from 386DX and 486SLC from 486DLC (Site not responding. Last check: 2007-10-16)
		Distinguishing 386SX from 386DX and 486SLC from 486DLC
		If we succeed, we have old 80386, 386DX or 486DLC.
		If we can't toggle the bit, we have 386SX or 486SLC.
	grafi.ii.pw.edu.pl /gbm/x86/sxdx.html (246 words)

	help ! to fix old 486DLC computer ! - Dev Hardware
		I hope anyone could help me fix a 486DLC computer.
		I think it might need a boot disk or something that i don't have.
		Time spent in forums: 2 Days 22 h 38 m 24 sec
	www.devhardware.com /forums/intel-processors-30/help-to-fix-old-486dlc-computer-36532.html?mode=hybrid (956 words)

	BYTE.com
		The Genesis\PC Replacement Motherboards allow the IBM PS/2 Models 25, 25 286, and 30 286 to run Windows, OS/2 Warp, NetWare, and other software.
		The motherboards ($295 each) provide a Texas Instruments 40-MHz 486DLC CPU; CMOS technology; sockets for 128 KB of second-level cache and a math coprocessor; two 16550-compatible serial ports; an Enhanced Parallel Port; a game port; PS/2 mouse, keyboard, and headphone connectors; the ability to accommodate an additional 32 MB of memory; and SVGA graphics.
		Two 16-bit ISA expansion slots are provided with the PS/2 Model 25 and 25 286 motherboards, three with the Model 30 286 motherboards.
	www.byte.com /art/9507/sec13/art15.htm (263 words)

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