Draft # 1. 2002.10.19
Draft # 2. 2002.10.27
I started MCA with 486 class machine and I'm not so familiar with 386 class computers and upgrade parts for those systems. Most of the products in my hands were collected at various Junk parts shops. Some were alive and the others were dead maybe, not sure.
Cache enabling utilities are mandatory to use with these clock-multipling CPUs.
Evergreen made various kind of processor upgrading parts for 286 to 486 class systems. IBM486SLC and BL processors were mainly used for their upgrading products. For detailed parts list, please check Evergreen's ETPARTS.txt.
REV to 486 Please click here for associated utility ( requires a 720KB floppy )
386SX3+ Evergreen Parts # 300, # 279 Editor's recommendation.
IBM486 3x capable processors were used for these models. # 300 was for 20/60 or 25/75 upgrade and # 279
was for 16/48 upgrade. In old Japanese catalog, parts # 298 was listed for 16/24 to 25/75 systems.
ETPARTS says the chips used for these models are "Blue Lightning 25/75" ( or 20/60 ).
I'm wondering if CPUs used for these Evergreen upgrades were really
a "IBM486SLC3" processor or not.
The model in pictures below is rated 20/60MHz but it is capable to run in 75MHz. Don't know exact part number because I got it free as "Junk" without packaging box. Most possibly it is # 300. It run fine on 5530-U ( intel 386SX system ). Then I tried to load it on 8557 Ultimedia and, in order to put it on IBM386SLC2 on the planar, I grooved one corner of CPU holder. Unfortunately 8557 didn't work with the upgrade. I didn't check further to clarify the reason why it didn't boot.
Easy to use. Just snap it on atop of existing 386SX CPU.
IBM486SLC2 25/50 EverGreen Parts number unknown
Same as above. IBM486SLC2 is apparently different from BL2 or 3 above. SLC2 is smaller than BL and is just same size with Intel 386SX.
IBM486SCL25/25 was not available as a CPU "unit". Some of PC upgrade
shop soldered off IBM486SLC2s from PCB and then used those chips
for their Laptop upgrade program. One in my hand is a such PCB.
TI486SLC2 EverGreen Parts # 289 ( but a package in my hand says # 288. Not so sure which is correct )
Tested it in my 5530-Uxx with intel 386SX, but it didn't work. Don't know if this unit was defective or the kit itself is incompatible with 5530-U( i386SX ). 5530-U didn't boot at all.
TI486SLC2 has 8KB L1 cache and it should be faster
than Cyrix 486SLC with 1KB L1 cache.
386DX2+ Evergreen Parts # 271 and #272
TI486SXLC/2 series were used for these models.
TI486SXLC/2 which was refereed as "TI Potomac" is clock-doubling CPU with 8KB L1 cache.
When I pull off the CPU from the associated socket to take pictures,
A14 pin was torn off ! Oh, my...
386DX3+ Editor's recommendation
IBM Blue LIghtning 3x processor ( BL3) was used for this model. Depending on system board clock, there were two versions available.
1. IBM486BL3 20/60 EverGreen Parts # 261 ( not listed in ETPARTS.txt )
2. IBM486BL3 25/75 EverGreen Parts # 263
If you don't consider clock rodding of Kingston Lightning 486 or 486Now,
REV to 486 386DX3+ is the fastest upgrade part to boost your 8570
or 8580. There is a socket for co-processor but I have not ever seen
co-pro for BL2/BL3 which fit to the socket on the PCB. Even without co-pro,
Evergreen's BL3 upgrades are really powerful. A weak point
of Evergreen's upgrades using BL3 for 386 PGA socket is it's pin
connection between PCB and PGA socket. Pins are soldered on
solder pads on the surface of the PCB without holes. Thus excessive usage
pushing it onto the PGA socket and removing it off from the socket may
break the pin soldering like a picture below ( leftmost ) .
Question: What is an IBM 486BL2 or 486BL3 (Blue Lightning) processor?
Answer: It is an IBM-developed derivative of the Intel 486SX chip that comes in two "flavors":
the clock-doubling 486BL2 and clock-tripling 486BL3.
I do not know if this is a CPU upgrade or not but it seems it is for upgrading 386SX. At least my 5530-U didn't work with it.
Kingston's approach for 386 upgrading was a bit different from Evergreen. Their products have own clock gene- rator on the cards. Both 486 Now and Lightning 486 use own CPU external clock isolated from system clock of the planar. Kingston still offers drivers and manuals at their web site.
486 Now see Louis's page for outline and detailed information.
Mine is from "garbage box" and without connection
pins for PGA socket. I have both 20MHz and 33MHz
Kingston's Lightning 486 may be considered as a counter product against Evergreens "REV to 486".
This unit has OSC on the card and CPU base clock is supplied from it's own clock generator but not from planar. Card has 66MHz OSC and an IBM 486BL2-66 on the card run in 66MHz clock-doubled speed in any systems regardless to main planar base clock such as 16MHz, 20MHz and 25MHz.
A surprising information was reported to the MCA Forum that the reporter used his Lighting 486 with 90MHz OSC installed and his lightning 486 actually run in 90MHz inner speed.
For detailed information please click here ( Louis's page mirrored by William Walsh ). The page explaining about IBM 486DLC2 Upgrade but it is Kingston equivalent.
I don't have this one !
MCmaster was originally developed and sold by AOX . Kingston bought the company and whole products.
My MCmaster shows AOX logo when it get powered . According to Louis's page there were several version of MCMaster. For detailed information and outlines, please visit Louis's page.
picture is not ready
Brief tips for MCMaster
Improve it technologies
Not sure about this company. I happened to get their product "Make it 486" NIB .
When I bought my first 5570-V ( 8580-Axx analogous ) from a individual
trader, the seller sold me some of 386 upgrade CPUs very cheap (
almost free ). "Make it 486" was included in the volume. Unfortunately
now I don't have it. I gave it to a friend of mine.
Make it 486 utility ( DXP format. requires 720KB floppy )
note from "Setup Programs" guide sheet in the diskette envelope.
and Blue Lightning IBM has some Information
about their products at their
intel 486SX/DX has 8KB L1 cache.
Are you lucky?
Interposer for Cyrix made by Evergreen
No information for this unit. Maybe Cx486DLC25GP shown below is associated with this kit.
This one is not listed in ETPARTS text too. Cache enabler maybe required for this upgrade kit.
286 Processor Upgrades by Kingston. ( May be a variation of 386SX Now )
Err.. honestly speaking, I'm not so sure if this is for 286 systems
or for 386SX systems. If this one is for 386SX, it should be installed
to 387SX PLCC socket like IBM 486SLC2 upgrade for 855x. But the CPU
is Cx486SLC-25, then it may be for 286systems, I think...
on the PCB. Most probably, these Cyrix 386 CPUs have 1KB L1 cache.
* "UGT" label observed in pictures means "Upgrade Technology Co. Ltd". It was a well known developer of upgrading parts mainly for PS/55. The company imported upgrade products made by Evergreen and Kingston and they made some modification for those products.