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K2s Retro Workshop
United States
เข้าร่วมเมื่อ 8 ก.พ. 2008
Channel about repairing, restoring, and upgrading old tech.
486SRx2 Upgrade Chip
Here we are again! More upgrade options!
Today we look at the Cyrix 486SRx2-25/50 upgrade module. This is a single chip on a carrier that slips over the stock SX processor to give you on-die cache and all the benefits that come with it!
Chapters:
00:00 Intro
00:45 The Chip Install
02:30 It's Never THAT Easy
03:49 Benchmarks
06:00 Outro
Today we look at the Cyrix 486SRx2-25/50 upgrade module. This is a single chip on a carrier that slips over the stock SX processor to give you on-die cache and all the benefits that come with it!
Chapters:
00:00 Intro
00:45 The Chip Install
02:30 It's Never THAT Easy
03:49 Benchmarks
06:00 Outro
มุมมอง: 927
วีดีโอ
Early Digital Prototyping System
มุมมอง 5421 วันที่ผ่านมา
Today we have a look at an early digital prototyping system by EL Instruments. Gives us a power supply, clock source, digital and analog readout, and digital and analog inputs! The Heathkit ET-3400A is breifly mentioned only because it's going to be a lot to go through, it needs cleaned up, and I umm would like to actually know what I'm doing with it when I go over it! Thanks for watching! Chap...
Voodoo Windows 98 Rig Gets an Aftermarket Window Mod!
มุมมอง 381หลายเดือนก่อน
Today we modify the Windows 98 rig with onboard Voodoo graphics to have a window in the side. This mod makes it where we can see inside without having to remove the side of the case as I end up doing at most meets where it goes. Leaving the side open makes me uneasy so here we go! And to be time period appropriate the kit also comes with a green CCFL. Join my new Discord server! discord.gg/dHvG...
386SX-25 With Cache Swap to 486SXLC2-40!
มุมมอง 4K2 หลายเดือนก่อน
Today we are FINALLY swapping the 386SX-25 processor out for a 486SXLC2-40. This will give us a rare look at an SX platform with L1 and L2 cache! Apologies for the hastily edited video. Workshop will be cleaned up and stop irritating me soon! The winner of the giveaway will be contacted soon! 00:00 Intro 01:32 Desoldering the SX and SXLC 05:31 Soldering the SXLC in place 06:06 First Boot 08:26 ...
VCFSW Arrival and Giveaway!
มุมมอง 1702 หลายเดือนก่อน
Due to power issues with our booth I will be unable to do the swap at my booth, I will get the swap done in the workshop on Monday! Comment below your guesses to enter! The 386SX with External cache is getting the TI 486SXLC2-40 installed in it. I am going to leave the 25MHz motherboard speed to overclock the SXLC to 50MHz. What do you anticipate the new 3DBench speed will be? Previous benchmar...
Comparing Macintosh Classic Computers
มุมมอง 1484 หลายเดือนก่อน
Late for Marchintosh but here it is. Getting ready for VCF but I DO have a 486-class PC comparison coming up in a couple of weeks. Gotta do a bunch of benchmarking! Thanks for watching! #marchintosh #macintosh #colorclassic
Color Classic PPC Daystar 1MB Mod and Overclock
มุมมอง 2835 หลายเดือนก่อน
Today we attempt to upgrade a Daystar PowerCard from 256K of L2 Cache to 1MB and install a Spicy-o-clock to overclock the 040 and PPC processors. 00:00 Intro 00:43 About the Upgrade 03:32 Benchmarks Take Forever 04:10 Replacing the Cache 06:05 Cache Replaced, Trying It 07:02 Configuring the Cache Card 08:03 Fail. 09:20 Spicy-o-clock 09:45 Benchmarks 17:05 Outro #marchintosh #macintosh #colorcla...
Projects, VCFSW, and Monsanto MV1 MV2 Vintage LED Finds!
มุมมอง 2066 หลายเดือนก่อน
Just a quick update video with a vintage LED find. ABQ Retro Computers will be at VCFSW and I will be there doing the processor upgrade on the cached 386SX motherboard. Likely Friday afternoon? Maybe early Saturday. I'll know more when it gets closer. The MV1 and MV2 LEDs weren't necessarily the first LEDs on the market but, the MV1 at least, is generally thought of as the first commercially vi...
386SX-25 with 64K of L2 Cache!
มุมมอง 1.4K8 หลายเดือนก่อน
Turns out they do exist! Pretty decent performance increase but, of course, this is just the beginning. As said in the outro, the first person to guess the hardware swap and the necessary mod needed to get it working will get one of my soon-to-be surplus 386SX boards! Thanks for watching! Chapters: 00:00 - Intro 04:08 - Pre-boot and BIOS 07:32 - Benchmarks 09:47 - Outro
Building a POWER Mystic Color Classic with a Daystar 601 PPC Upgrade Card
มุมมอง 1K9 หลายเดือนก่อน
Reupload due to my stupid editor leaving a blank spot again. Today we build a POWER Mystic Macintosh Color Classic using a rarely seen Daystar 601 upgrade card. This upgrade will be a vast improvement over the stock CC logic board. Most of the build is pretty standard, sound, fans, and HD replacement. VGA mod will require some parts changes to do correctly and get us Hi-Res mode. 68kmla.org/bb/...
486SXLC2-40 Cache On vs Off Comparison
มุมมอง 4449 หลายเดือนก่อน
This is the part of the previous video that was blank. It's an excellent showcase of what *8KB of L1 cache can do vs having it disabled. This also works excellently for slowing down a system so that you can run timing-critical games like Wing Commander while being able to speed the system up for Doom or Heretic. Hmm, I wonder if the turbo button on these disables the cache... Sorry for the auto...
386SX-40 vs 486SLC-40 vs 486SXLC2-40 and the Curse of PC Chips
มุมมอง 9K10 หลายเดือนก่อน
Today we greet a new motherboard to the family with a 486 SXLC2-40 processor. This is a clock doubled processor with 8KB of L1 cache which should help it stay ahead of the lack of bus bandwidth compared to the other two contenders. It's a PC Chips board and we tried not to judge it but ended up having to. I neglected to mention it in the video but we also previously had an issue with the DLC an...
Indigo iMac G3 Restomod. CPU Swa... OC, HDD Replacement, RAM Upgrade, and Speaker Replacement!
มุมมอง 77211 หลายเดือนก่อน
Today we visit my highly used Imac G3. A speaker finally died in it and it's time to open it up and do some upgrades and repairs. I did notice that the power light is flashing in all of this. Looks like it needed a new battery and yet another PRAM reset. Doesn't seem to have affected the performance, fortunately. Didn't all go to plan but I did end up with great results and I look forward to us...
Reviving and Playing an AST Advantage! Adventure 4066d
มุมมอง 621ปีที่แล้ว
Today we are repairing and playing with an All-In-One 486DX2-66 equipped AST Adventure! Advantage 4066d. This video was a long time in the making and was surprisingly frustrating after getting the unit to work. Upgrades, jumpers, ugh. 00:00 Intro and Initial Smoke Test 01:39 Inner Chassis 02:58 Removing the Motherboard 06:00 New CMOS Battery 07:53 Typical... 08:32 Doom Benchmark 12:20 Processor...
Welcome to Edgar Digital
มุมมอง 292ปีที่แล้ว
Sorry for all the 'umms' in the video. I'll just pretend it was a challenge to say umm instead of meow. Edgar Digital is a computer shop located in Las Cruces, NM. It's an amazing place to visit and if you ever get a chance to you should! Like I mention in the video you aren't filling your trunk for $100 but you get to avoid shipping damages! Please drop any questions below and I'll get back to...
3Dfx Voodoo Powered Motherboard Gets a Memory Upgrade! #GPUJune
มุมมอง 8K3 ปีที่แล้ว
3Dfx Voodoo Powered Motherboard Gets a Memory Upgrade! #GPUJune
Intel 386SX to Cx486SLC, benchmarks with cache enabled.
มุมมอง 2.7K3 ปีที่แล้ว
Intel 386SX to Cx486SLC, benchmarks with cache enabled.
Intel 386SX Upgrade to a TI err Cyrix 486SLC!
มุมมอง 7K3 ปีที่แล้ว
Intel 386SX Upgrade to a TI err Cyrix 486SLC!
Macintosh PowerBook 100 Series Power Supply Rebuild
มุมมอง 6233 ปีที่แล้ว
Macintosh PowerBook 100 Series Power Supply Rebuild
Cyrix 486DRx2-66 Revisited Against 80386DX-40. It works!
มุมมอง 2.8K3 ปีที่แล้ว
Cyrix 486DRx2-66 Revisited Against 80386DX-40. It works!
AT Power Supply Recapping, Simple and Quick
มุมมอง 4693 ปีที่แล้ว
AT Power Supply Recapping, Simple and Quick
486DX2-66 VS ODP5V-83 Pentium Overdrive CPU Comparison
มุมมอง 4.6K3 ปีที่แล้ว
486DX2-66 VS ODP5V-83 Pentium Overdrive CPU Comparison
386DX-40 Upgrade! Texas Instruments 486DLC-40 and a Rare Cyrix 486DRX2-66!
มุมมอง 14K3 ปีที่แล้ว
386DX-40 Upgrade! Texas Instruments 486DLC-40 and a Rare Cyrix 486DRX2-66!
386SX-25 Leaky Battery Repair and Demonstration
มุมมอง 1.2K3 ปีที่แล้ว
386SX-25 Leaky Battery Repair and Demonstration
Noritake 144x16 Graphic VFD Animation with Arduino
มุมมอง 1.6K10 ปีที่แล้ว
Noritake 144x16 Graphic VFD Animation with Arduino
The 5.9 in the grand Cherokee is faster.
Aww sweet machine! I'm in it for the 486 build... Which AST was that BTW? I have to be curious if it has a similar board to my own 6066d. Cheers! I'm really curious about your next video :)
The AST is a 4066d. Nice all in one but it would be 100 times better if it had a freaggin feature connector on the board!
Lucky you to find one of these. I have been looking for a 486SRx2 for years because I have a Magnavox computer that would be a perfect candidate for using it in. But I've had no luck so far.
The Magnavox is interesting in other ways too: the CPU is actually located on a daughtercard that plugs into a connector on the motherboard, together with the system oscillator and a little glue logic. Probably these systems were upgradable, and in fact I know they were because I have 2 of those CPU cards, one 25MHz and one 33MHz. Been thinking of reverse engineering the daughtercard and maybe making a new one with say a 486SLC40 or SLC/2-50.
I was a bit lucky but I've been watching the CPU gold recovery auctions for a few months trying to get 3x GE7 geometry engines for my Iris Indigo that I've yet to feature on the channel and this came up during that. For the upgrade, if you have a 25MHz card something like an SLC2 25/50 would fit in there fine. Absolute worst case you end up with a 50MHz 'SX' but even with the barb register instead of the flush input there is a decent performance bump.
@@DKJones96 yeah I have a few 486SXLC2-G50; unfortunately they are of the 3.3V variety, so they would need voltage conversion to work on this system (yes the I/O pins are 5V tolerant, but the core voltage is not, 3.3V is required and 5V will fry the core)
I used to have one of these on my original 386SX machine… Even with a huge chunky heatsink - it eventually burned out and failed 😢
@@paulpsomiadis5847 oh man! Yeah this cpu ran over 100c when I didn't have anything blowing on it. With a fan is a much more manageable 70c.
Something to note with these, as I have one: the "snaphat" upgrades are woefully flaky. The carrier needs to be removed and the CPU needs to be soldered direct to the board. I have one in a PS/2 Model 40SX and it runs great, when the pins make good contact, that is. They're too small for me to add solder to, to beef up the thickness on them, and the way it connects to the CPU over top is great maybe once or twice, then it degrades from there. Make sure your pins are COMPLETELY CLEAN and run the carrier through an ultrasonic cleaner, especially if you used any flux of any kind at all. I was going to bring the machine with it to VCFMW in hopes to get someone there with a hot air station to give me a hand getting it onto the motherboard but I've decided to wait on that front.
@@SudosFTW yeah it gave me some fits even after soldering the processor pins back. I will run it for a bit and see how I like it. Hard to complain about the performance the 8kb TI model gave.
Would any of these drop in 486 upgrade chips work on 386sx-16mhz? i`ve not found definitive answer for this yet though many point to answer being negative.
@@Blackkspot I don't see why not. It would only run 16/32 speed but it should work. Using the barb input for the cache alleviates the lack of flush control on an older system. I bet that 16 might take fine to a 4mhz overclock if you wanted to push 20/40.
Yes, it worked on my IBM PS/2 55sx, but the gain was offset by the proprietary bottlenecks on that terribly slow system. If you have a reg. PC and can upgrade the storage and graphics, you might get better results. Just memory alone is not enough; I had 8 MB on board, +8 MB on a card, but the 55SX was bottlenecked by the 16-bit bus, 8-bit non-accelerated VGA, and slower-than-ESDI hard drive. I didn't want to throw more money on expensive PS/2 compatible parts, so I gave up. You need a later 386sx-16; the earlier ones (A step) lacked a float pin to disable the original CPU. My PS/2 was purchased in 1991. Google this phrase: 'cyrix 486srx2 float pin' I don't have that PS/2 or the upgrade anymore. I might have a copy of the Cyrix utility floppy somewhere. I remember it was difficult getting the upgrade to stay attached to the original CPU. I had plenty of room, but that thing kept detaching at the slightest bump to it.
Great stuff! The DRx/SRx2 while not super fast are super fun and rare upgrades. I think most of them were sold in the US. I've never actually seen one in Europe. We did/do have plenty of the TI counterparts like the SXLC and SXL though. I have 6 of them and they end up in various 386 and even 286 machines! 🙂 Such a cool era of tech to tinker with.. I have one of these upgrades in my type 1 IBM 5170 and it also "runs" Doom! Imagine that, Doom on a machine from 1984, using its original mainboard!
I have Ti486SXL2-40 on my 386DX-25 machine so it runs at 50MHz. It gives 23,8fps on 3DBench. 32bit data bus really makes a difference at higher clocks.
what a interesting chip
386 had a very long service life. When it was too slow for PCs it was used as a microcontroller for decades.
Love this content. 386 never gets old or boring.
Nice :)
Over the years I have collected a bunch of similar stuff. Those old prototyping devices are really cool. I have 3 Heathkit ET-3400 devices, but all of mine are 6800. The 6809 is awesome. I did a video about the first one that I got, but I've never gotten back around to doing any fun projects with it. Maybe someday...
Plastic polish could work on that acrylic window. Also custom sleeving, (also neon green) could bring out those late 90's/ early 2000 gaming rig looks
half inch is not 10 centimeters 😅, it's 1.27 centimeters (or 12.7 milimeters). Maybe you meant 10 milimeters ?
I have my PPC 601 processor installed on an LC 575 logic board when inserted into the back of a Color Classic. However, after enabling the 601 Processor Control Panel in Mac OS 8.1 and restarting, I hear the PPC chime, and just see a blank black screen. Nothing happens after this. Not sure what to do next.
Thanks for the interesting videos. Sincerely, a subscriber
That Mod exposes the amazing "cable management" of the old computers. 😆😆
Kind of like the idea to install such a mod, but I would have liked the gasket to be less chunky. Lots of interesting videos to come it seems. Cheers
Yeah the gasket is a bit chonky but it expands outward and gives you room for error which is probably inevitable with this kind of manual job.
A dremel would go a long way here😅 Maybe try goo gone on the acrylic glass.
I did try goo gone on the glass, it got rid of the word stuff at the bottom but the fogginess it didn't touch. Seems like an outgas reaction with the acrylic from the rubber gasket.
Interesting that the 486DLC-40 was super common here in Brazil, I myself upgraded from a 386-sx 33 to it in the 90s
aaaaaaand.... aaaaaaand.... aaaaaaand.... aaaaaaand....
do you have any links for the $10 ebay replacement speakers?
Here you go! They appear to be about $13-ish now. www.ebay.com/itm/176352881630
be careful all that heat around those tantalum caps
More like not enough IBMs ;)
WOW, ok way more than expected. Well done :)
Awesome hand soldering of the the 486 to the 386 location./ removing the 386, without bridging any of the contacts.
Thanks! I think leaving out the solder paste that I was tempted to use for applying it to the motherboard is what helped. Just throw on more flux!
Online pages write, that cacheless processors have 1 kb internal cache.
The 386SX has 8x 32-bit internal registers. Outside of that it has no cache like the 486 series did. The Cyrix units like my Cx486SLC-40 runs 1KB of internal cache and that speeds things up considerably. This TI unit has 8KB. There are some others out there running 16MB but I don't have those on hand.
"None of the codes make sense" - my life as a software engineer summed up in a PC repair video.
Does it run doom
@@ceruleanserpent387 it should! But it is having an issue with that right now having to do with the cache.
Thanks you!
Try an industrial disk on module, those things are expected to work fine even with the worst maintained industrial junk made over the last four decades, I saved one from a smashed slot machine and was really surprised to find that it works on systems that wouldn't even try to "talk" to a Compact Flash card. Maybe an industrial grade CF can be as good as a DoM... Anyway I was never able to use a CF with *any* dumb ISA IDE "controller" without ending with data corruption after a few hours or days while with EIDE/ATA-2 or newer controllers everything works as expected, I guess those controllers generate much cleaner signals with much better timings. LGR on one of his videos (I can't remember which one) had to resort to a real hard drive to be able to show some program or game running on his famous "woodgrain" 486, I think he already had everything isntalled on a CF on a faster computer to save time and then just moved the CF adapter to that 486 but on the 486 the CF was corrupting the data every now and then. Only those that keep the mainboards powered on for a few minutes each time to see at how many FPS will DOOM play seem to have luck with CF on ISA controllers... or maybe they just cut out any failures from their videos.
CF cards always gave me issues on PCs as a boot drive tbh, even ones meant for internal use. Had a lot more luck with the cheap SD card to IDE adapters, funnily enough on Macs it's kinda the opposite situation - just goes to show how temperamental old machines are with hardware lol.
I have had surprisingly good luck with CF cards. Pretty much anything I have that runs an IDE drive has a CF card these days. My VLB 486 has run the same CF card for going on 10 years and it has a ton of time on it. I love them for these quick tests because I can just pop it into my modern machine, copy a program, and then slot it back into the machine without hassle. My AST 486 All-In-One also runs a CF card. Some of the issues that people run into could be old CF cards? I struggle to think of a CF card in my shop that has died or corrupted data. Better go knock on some wood....
@@amirpourghoureiyan1637 Even more mondern machines? My Voodoo Pentium 3 rig has run the same 32GB CF card for 5+ years.
@@DKJones96 yeah I've used Sandisks and Transcend cards but they just don't want to boot on PCs like my Athlon and Pentum 4 builds, they work fine on my G4 and G3 systems though. The CF cards are a lot more expensive where I live than SD cards so I've just used them for a long time now.
Easily run Crysis.
that exact motherboard was my first computer ... 386 sx 25mhz -- 1991 the 486 was still a dream away, the system to drool about at that time was the 386 DX 40 but mine has extensive catastrophic battery damage... even so it does runs a few POST codes but then it stops on some code related to the system timer or RTC... I need to find the broken traces to see if I can bring it up to life
20.8 fps
20,1 FPS
19.8
18 fps❤
21.1 FPS
Congrats! You won the giveaway! Email me to my email address in the About section of the channel and I will work out getting your processor shipped!
Nice challenge :) 20,7 FPS
Swap is done but getting a 16H error. I think it's not liking the overclock so I'm working to get some 40MHz crystals in by the end of the week. Might use a function generator to make the 40MHz happen before that just to continue troubleshooting. In theory, without enabling the cache it should act exactly like a 386... It mostly posts though so it was a successful transplant!
That is strange and sad. This overclock is not to far away and the M/B can do 25MHz bus. I assume you have a 5v 486SXLC2-40. Try 40Mhz and then increase the clock on the fly to 50 if you can. With my TI486SXLC2-50 (3.3v, a common chip), the 2x multiplier never worked but this is a M/B issue I think, and my max there was 1x40Mhz. With the cache disabled this was actually a bit slower than a 386sx 40MHz. Your situation is different. I am curios about the results. Now because this M/B has cache I hope you do not face problems enabling the internal cache. Oh and if it works 2x20 = 40MHz with all enabled. it is more or less safe to multiply all predictions with 0.8 (maybe a bit lower?). So mine is 16.5fps something. This is not 100% true as memory refresh is usually triggered by the reference clock, so the overhead is higher on lower bus speeds.
@@atheatos I got it! It was a BIOS issue and someone on the VOGONS forum uploaded a bios dump of their board which was essentially the same thing but a different brand and an AMI BIOS. I think this chip will probably do 50MHz without much coaxing and I will try that soon. I'm off next week so, at worst, I'll have everything uploaded next week. I do have a question though. The motherboard supports enabling and disabling of the cache but I have to use the utility to do it and I've read that the multiplier setting is where the internal cache enable register is but can't find the right utility or what other register value I need to change to actually enable the internal cache... What did you use for your SXLC2?
Nice! These are good news. On my board I tried many Bios but never managed to enable the 2x mode (chipset revision problem?). I will wait now for your the results :) , this is very interesting. 50MHz should be possible, maybe more. Basically all these "Cyrix" CPUs have the same configuration registers. So the tools to set them are the same. The only difference between 1x and 2x CPUs is that the bit that is used to select cache mapping, is instead used to enable 2x mode. So: "cyrix.exe -c[d] Two way assoc. [direct-mapped] cache. -cd for SXL 2x mode" In Bios when you enable cache it sets these registers to some predefined values. These values are rarely optimal, so it is good to use the tool either-way. Check my videos on 486DLC and 486SXLC2 for more. In general you have to play a bit with different settings based on your config. Make sure A20 line is connected to your CPU and maybe optional the Flush signal. Maybe also play with the KEN input for more performance.
That is good news, waiting for the results now :) Regarding configuration... All these CPUs use the same configuration registers. So the config tools are the same. When enabling cache in the Bios... the resisters are given some presets that usually are not optimal. The difference between 1x and 2x CPUs is that the bit responsible for setting cache configuration is repurposed for enabling x2 mode. So: "cyrix.exe -c[d]" Two way assoc. [direct-mapped] cache. -cd for SXL 2x mode. Check also my video on the 486sxlc2. Happy testing :)
Good video. I have 2 PC Chips boards . One Pentium mmx and one AMD . I picked up at computer fest back in the late 90s. I've never fired them up.
I build one of these 20 years ago and im stil using it (for te retro games) 🙂
Nice meeting you today Kyle! BCB here! Just subscribed 😊
I got one back in 95 and recently rescued it from my mother's attic. The battery damage destroyed many SMD components. Thank you for posting this video. I'm hoping I can repair it one day once I've gotten confident with SMD soldering.
Great video! My Dad bought a Macintosh 512K back in 1988, and there were some games that I loved playing on it that I’ve been told will work on the Macintosh Classic, but not the Classic II. Beyond Dark Castle, Arkanoid, Sim City, were all Mac games that I had a lot of fun playing.
Some early games had trouble with system 7. I run into that a lot trying to play some earlier system 7 and 8 games in even 9.
@@DKJones96Yeah, we weren’t even running System 6 on the 512K.
Awesome video I own two of these boards. Could you link me to the source of the 4MB vrams?
I was thinking USE SOCKETS
I wish. That cache card is tight and there is zero room for sockets unless I design a card to replace it. I could design a card to replace it...
The strange results in the uncompressed video benchmark could be due to slow hdd transfers.
Could be. The cache result being lower is odd but it could be a rare situation where cache gets in the way of an already difficult situation for the processor.
This video popped up in my recommendations and it’s very interesting, I’m definitely subscribing.
Nice! ❤ Ive got one of these bad boys siting on my shame pile of things to fix