USB to ISA Card Surrounded by Issues But Still Works Well

This video is the followup to my FreeDOS on the 5150 project that follows along with why I wanted FAT32 on it so badly. But it ended up becoming a much bigger project because it turns out there is a whole world of nonsense going on with these USB adapter cards. So I researched what the deal with them is and what you can do to make them work. And they do work very well in the right setup.
Related Videos:
LGR's video on the card: • This 8-bit ISA to USB ...
Installing FreeDOS on 8086 PC's: • Installing FreeDOS for...
Disk imaging 486 setup: • More than two floppy d...
Related Pages:
Driver version 1.9 download from CD (Ripped thanks to LGR!): archive.org/download/ch375-is...
Kiwa's Twitter Thread: / 1471542550800617472
ToughDev Blog Post: www.toughdev.com/content/2018/...
VCFed Forum Threads:
forum.vcfed.org/index.php?thr...
forum.vcfed.org/index.php?thr...
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[@LGR]

Great work and research here, it's good to know what else this handy thing is capable of doing. I've ordered more of them as well. Thanks, Shelby!

[@CainSouthern2112]

Wow your quick

[@ajslim79]

the 5 hour long livestream was a real discovery process ..oh, man

[@cappaculla]

Yep, that's how it's done !!

[@faumnamara5181]

Interesting - would be great for someone to design a newer version of this card using the reference material. Sadly beyond my meagre abilities - but would make for an awesome series of videos. The electronics design followed by the driver creation. Perhaps implementing more usb functionality.

[@freddyvretrozone2849]

@@faumnamara5181 It does exist, designed by LoTech

[@RetroErik]

After watching your video, i ran some new speed test comparing the 1.9 and the 2.0a driver. Space Quest 3 copied from XT-IDE to USB on ISA card (1,964MB) on an 286-12MHZ machine 1.9 driver: 48 sec with parameter %0 1.9 driver: 52 sec with parameter %1 2.0a driver: 71 sec with parameter %0 2.0a driver: 72 sec with parameter %1 As we can see the 1.9 drivers are about 32% faster.

[@RetroErik]

@@TurboCharged_RubberDuck you are right. I only found the 1.9 driver on the CD.

[@mgtroyas]

@@RetroErik My card came without CD. Can this file be downloaded from somewhere?

[@bleeedthebrakes]

After looking at the SDK, I think that dos drivers can be revisited or rewritten from scratch since the code for interfacing with other microcontrollers are included, along with sample programs that can be ran on DOS

[@T3hBeowulf]

Absolutely perfect timing for this. I use CF for my retro machines, even designed and printed a 5.25" panel that combines a Gotek floppy emulator, OLED and IDE CF reader into one bay. I haven't had much trouble reading/writing to CF that way but the idea of USB flash storage seemed like a pie-in-sky dream until LGR's video about this card. He demonstrated that it came so close to ticking that box but was a little rough around the edges, I had initially started to write it off as a novelty. Now you've convinced me to order a couple, if for no other reason than "backup". CF slots aren't great for hundreds of insertion cycles and I'd love to have an easier way to transfer files. This is excellent, thank you! (...and thank you too LGR for seeding the idea)

[@flavortown3781]

0A

[@proxy1035]

Honestly this seems like a perfect target for a community made project. A PCB that actually uses Interrupts, and has correctly labeled (and maybe addtional) Address Jumpers/DIP Switches. (Option ROM could be used for XTIDE BIOS) An open source Driver that has clearly documented features, and you can report bugs to so they actually get worked on and fixed. also 11:54 Modern Windows natively handles FAT16, if you want to format a drive with it you need to make sure that the partition size is not larger than 2GB (2048MB), otherwise the FAT16 option will not show up when you get to select the filesystem

[@HappyBeezerStudios]

Yeah, WIndows natively has some, lets say artificial issues, creating big FAT partitions. I still remember XP being unable to create FAT32 partitions above 32 GiB, but 3rd party software ca, and XP can read them.

[@canaconn2388]

@@HappyBeezerStudios windows to this day still can't by default

[@TSteffi]

WDTJ crack it, port it, open source it, upgrade, package, zip and ship it?

[@Helladamnleet]

maybe even add basic HID compliance so you COULD use a USB keyboard or mouse in a pinch

[@OpenGL4ever]

@@HappyBeezerStudios There is no reason to use FAT32 with WinXP. WinXP can use NTFS. The story looks different if you use Win9x/Me or DOS. But for WinXP i would definitely use a NTFS partition.

[@UpLateGeek]

Awesome! was initially really interested in getting one when I saw the thumbnail of LGR's video in my feed. Until I watched the video. Now you've managed to figure out all the issues, I'm definitely going to pick one or two up. So thanks for doing all the testing and research, it's always good to have another tool to make using these old machines easier. Now if only someone would make an MCA version ... _[Patiently stares at Tube Time's Twitter]_

[@AshtonCoolman]

You're Retro Tech Jesus. Your hair is nicer than Steve from Gamers Nexus so you win the contest. About this video, after LGR's I'm really glad you expanded on the capabilities of this thing. It's so very interesting.

[@gamagama69]

steves hair looks like when you dont take proper care of curly hair and try to brush it straight which just makes it look worse you need to use a special brush to not have the just woke up look

[@amplifier28]

Enjoy viewing your videos from both your channels. Thanks for all the info!

[@Error42_]

I was looking at these on eBay a couple of months ago. I think you've answered all my questions with this video so thank you 🙂

[@humidbeing]

Excellent video. This is a great capstone to the LGR et al videos about this card. Signed up for your Patreon.

[@Helladamnleet]

I paused the video because I started having a coughing fit and noticed you have many of the same games and software on display that I had growing up. You seem like a really cool dude and kind of remind me of someone I used to know who's much older now. I'm kind of glad I stumbled upon your channel.

[@WesleyNixon]

This was an epic livestream and well worth the watch on twitch.

[@RyogaXvX]

I love your videos! Such inspiring stuff! Thank you so much for all of your hard work and sharing with us!

[@RetroErik]

Nice video. Good research. I made a video about this card a few weeks back. Like LGR i also used the 2.0A driver, and i had trouble with some of my flash drives. I will give the 1.9 version a try, and also see if it is faster. Also thanks for explained the IRQ, i did not understand this at all, before i saw this video.

[@kaitlyn__L]

Your hair is so luscious! Also, good job on figuring out all the oddities about this thing :)

[@i80386sx]

Nice video! Retrotech Chris planted the ISA to USB card in my hand. This video is a lot cleaner than mine.

[@Good_Luck_8619]

Nice to see this innovation for older hardware this opens a door of possibilities for older computers defo !

[@12me91]

This is such an amazing card. USB is so awesome and useful giving the keys to the kingdom to all the old PCs is so cool

[@ArJorge1987]

I just made mine work in a 1989 Laptop (That has 2 ISA ports) with a 286 and DOS 5.0. Thank you very much for this video, to you and @LGR .

[@SwitchingPower]

Looking at the schematics for the current SMD version of the card, it still has a broken address decoder for the ROM socket like the older cards mentioned in the VCFed forum thread. They still don't decode address lines A18-A20 which causes the ROM to be mapped multiple times in the main RAM area limiting it to only 96Kb

[@daishi5571]

Adding the convenience of USB to these legacy systems makes them so much more approachable. I added USB to my Amiga a few years ago and it has been fantastic, but it also has a more complete full USB stack to allow other devices beyond the memory sticks.

[@Helladamnleet]

I think that's kind of the rub with this one. It's neat on paper but how useful is it really when you can get a CF or SD card reader that will just work

[@daishi5571]

@@Helladamnleet And the advantage of going that route is OS compliance.

[@I.____.....__...__]

6:15 Maybe you can connect the IRQ pin on the chip to the fingers on the card-edge yourself. I had an old UART that didn't have the reset-pin broken out, so I had to manually reset the Arduino whenever I flashed it, so I soldered the pin on the connector to a disc-capacitor to the pin on the chip and it worked a treat (until I just got another UART later that had it broken out by default). 12:26 I'm reminded of a time when my system wouldn't recognize that I had changed the floppy disk. It turned out there was a break in one of the wires of the ribbon-cable. 15:40 Yup, searching for stuff is a big problem, and that's with legitimate keywords, forget about all the keyword spam from sleazy sellers. 😒

[@gigaherz_]

I'm a couple weeks late but... That circuit diagram he showed had an inverter, so I'm assuming you can't just connect the IRQ line as-is, and would need an appropriate inverter (TTL or CMOS... whichever logic system ISA was built on, can't remember off the top of my head), and then I assume you'd just want a custom PCB so you can have the extra hardware in it.

[@AngelaTheSephira]

@@gigaherz_ Or dangle a couple air-soldered transistors. :p

[@C64-Museum]

Thank you very much!!! Great tutorial - it works perfectly. My Toshiba T3200 has a drive D now with over a billion bytes free! 1GB was the smallest I could find. Now I need an other card for my IBM portable!

[@phazonclash]

Discovered your channel because of LGR, someone talked about you in the comments, and I love it! As a 40yo old fart, you bring back some great memories 👌

[@stoojinator]

That was a very inneresting video. I'll have to get one of these for my old PCs. Looks like it could be very handy.

[@brandonupchurch7628]

Man this is really the topic of the week, first I seen it on a small channel i80386sx , then LGR, now here. Is there a 16bit bus interface equivalent of the CH375? Any way to adapt it to work over a parallel port? My current method of transferring files to older laptops with limited expandability is to use an parallel port CF adapter, and the DOS drivers for those I've found can be pretty wonky with what cards they like.

[@gigigigiontis8]

I think it could be adapted for parallel port use. It is an 8 bit device as the parallel port is and there's enough pins on the port for the other signals so...

[@i80386sx]

Thanks for the shout out!

[@AttilaSVK]

I've seen this on Aliexpress a few times, but never had the motivation to order one, until this video came out :) I use a 3Com Ethernet card in my Toshiba T3200SX for getting stuff to and from the machine (or I take out the CF card I installed in place of the HDD, but that's a bit of a hassle), so this seems to be the ideal solution. It's 8 bit ISA, so I can still have my SB16 in the system, and it seems to be more useful than a network card.

[@AdamBouzaneOfficial]

Amazing content! I literally watched it twice

[@freddyvretrozone2849]

Hi, I decompiled the CH375 driver, and the Port read itself is donc with more than 40 Instructions. (Instead of 1) The Driver is written in C, then, not optimized at all for 8086. It is a matter of hours to optimize, but as I don't have the board, I can't test. I am sure it can reach 200Kb/s and more.

[@martinjh999]

That printer noise at the end brings back memories!

[@JVHShack]

That's it! I'm buying 10 of these cards for my pre-Windows 95 PCs.

[@worldgate989]

Your drive being 'overly dramatic' cracks me up. :D

[@viscountalpha]

I had no Idea this existed until now. Might be interesting for an XT build i'm working on building up.

[@MrLurchsThings]

Very useful! Thanks mate 👍

[@StringerNews1]

This is a big deal! I remember when I started noticing USB ports on our office machines, and finding no USB drivers to use with them. Support for older computers was non-existent, with Intel tying USB only to newer chipsets, and Microsoft insisting that it was "too hard" to do something as simple as make an installer for a device driver. With that poor attitude, it's a wonder that USB succeeded in the market! My first PC clone that was mine to keep was an old AT&T 6300, and the first thing I got for it was an XT-IDE card and a used 60 MB HDD. That machine had an oddball BIOS that refused to boot any DOS version other than what came with the machine, but the 8086 version of Minix 1.5 ran great, and gave me most of the UNIX utilities that I needed to do useful work.

[@anon_y_mousse]

It's sad how long most companies have been at it with thwarting your right to repair your own machine.

[@petermichaelgreen]

"With that poor attitude, it's a wonder that USB succeeded in the market!" My memory is that USB on win95 was a distaster, you could get drivers for the controllers installed but good luck finding drivers for any devices to plug into them. 98 was much better though still far from perfect and 2K better still (I didn't try ME so can't comment on that). Apple also released the iMAC in 1998 which was "USB or nothing".

[@StringerNews1]

@@petermichaelgreen yeah, but there was nothing preventing Microsoft from offering the same drivers for Windows 95. The only real difference between 95 and 98 was that 98 made Internet Exploder inextricable from the OS, and that made it slower and less stable. For the corporate user, sticking with 95 was the better choice until moving to NT, as we did in 2000.

[@jimsubtle886]

Hey, love the channel, just found it last week!! Changing the silk screen at any point now would be a mistake. The gerbers should be left alone and the board should be produced as is. With more versions/revisions just makes more problems to track.

[@emuhill]

How about using a label to provide the correct info that you stick over the silk screen?

[@klausmoritzpeitzsch690]

Just tried to get one up and running. I will try again tomorrow and hopefully your hints will help. And I need the ROM feature for an XTIDE but this is another subject...

[@95Comics]

Do you have any videos or can you recommend one that shows what an absolutely maxed out XT computer looks like? Using all kinds of upgrades and tricks on top of the old ones? Love the channel new subscriber here!

[@freddyvretrozone2849]

I ordered one and will try to do a driver for this. It is simple to support multiple partition. If we do a board with a CH376, as it support FAT32 directly, we can do the same by putting .IMG files on the USB and why not even emulate floppy.. The IRQ is not necessary, the driver surely regularly check the IRQ Status in the Timer interrupt, to allow the Drive to be mounted/unmounted.

[@williefleete]

That serial version of the adapter might have given me an idea for my compaq SLT286. I had been reverse engineering the modem upgrade card for it and have made a (mostly) working serial card, I could potentially tack one of those talking direct to the UART and have a USB storage card for it. I would need to see if the chips and data sheets are available

[@bdot02]

Video processing gang checking in

[@alertol]

About wrong labels on jumpers... When I was learning about PC building, in my favorite book by Mark Minasi was a chapter "be aware that markings on board and docs may lie" (sometime by mistakes or last time bug fixes)

[@samuellourenco1050]

Still, it is a very nice addition and a great idea.

[@taggat]

Hey Tech Tangents, have you scene the new TV series Severance? I think that you would really love some of the prop computers they have. One might even look familiar.

[@ehsnils]

I would call it an ISA to USB card, the difference is the significance of where the master is. When seeing the title I was considering a card that allows a modern computer to access an ISA bus.

[@lindoran]

Looking at the reference schematics tonight. It can't be hard to make a serial adapter, just at a glance there's not much going on as the chip does a ton of the work for you.

[@ewaste9658]

Hat is straight fire 🔥🔥🔥🔥

[@TheSulross]

would be fun to see someone try to devise the equivalent card for the S100 bus and CP/M - the channels that cater to the 1970s era microcomputers are harder to come by, of course

[@systemchris]

An s100 implementation must be doable

[@makomk]

Should be doable in theory - the chip itself has a reasonably generic 8 bit interface, it ought to be possible to interface it to anything from that era. Of course, older systems won't generally have any filesystems in common with modern PCs which would complicate things a bit.

[@anon_y_mousse]

That's a cool card. I'd like to disassemble the driver see how it ticks one of these days. Not that I would need it because my oldest computer is a Win98 beast and it has two USB ports already, but it'd be fun to mess with.

[@tylisirn]

There appears to be a .C file, so you might even have the source code to one of the versions.

[@csevrence1]

OMG NOX still holds up today. Love that game.

[@PankratPC]

Cool job. Было очень интересно

[@regenceaudio]

Can you make a video about booting from these carda and the ROMs available for this?

[@HechoEnPeru1974]

The very best way to share files from a modern computer to a new computer is using a ZIP drive and an app called Palmzip, it allows use Zip drives on everything include 8088 processors. I love my vintage collection and I don't want to modify the original hardware, the zip drive connect to a regular parallel port allows me to share files without modify my hardware.

[@therealjammit]

The 64 bit version makes me think they have a PCI version. Not sure why you wouldn't just use the plethora of PCI to USB cards out there. I think if the PCI version exists it's for booting off of a USB when the main board doesn't allow for it. Good idea for older machines in industrial environments where it may be old, but it works. I've run into things like this as a machinist, where a 40 year old CNC machine that costs $140,000 needs to get an upgrade from paper tape to USB and spending $1,000 for a machine that interfaces the USB to a paper tape reader is cheap.

[@oso2k]

What happens to perf if you load a disk cache like smartdrive?

[@SwitchingPower]

The IRQ from the CH375 is readable at IO 262 and 263 on bit 0 looking at U5B on the schematic shown @6:08 so the driver must poll these IO address to get the interrupt status of the chip, the delay variable is probably the polling rate to read this bit. J1 sets databit 6 at those same IO address, what is does is op to the driver

[@freddyvretrozone2849]

The Driver V2.0 Does, but not the 1.9, It is also possible to get the IRQ Status from the standard ports.

[@robertfrase3846]

How do you force change the ISA card's drive letter from D: to E: or some other drive letter. My CD is D: so when the ISA card is installed, the CD Drive vanishes. If I remove the ISA to USB card, I can then change the CD drive letter to E:, but when adding the card again, it shows as D: but is not accessible, and the CD disappears again. I'm using Win 98SE.

[@antonlebedev2890]

Whoa, you've got a boxed W98 out there) Only OEMs here))))

[@halitimes2]

I quite like the old tool NWLite, netware like, few simple drivers and you can map drives between PCs.

[@squirlmy]

where did you get it? A simple DDG search gives a lot of unrelated results.

[@youtubiers]

Are you able to run two of these cards at once?

[@jamesowens7148]

So..why haven't you used a splitter to give more power to the external HDD/FDD?

[@porklaser]

I'd be really interested to see if anyone has luck using one of these to host an xt-ide boot rom. The xt-ide rom can bring greatly increased functionality to old systems that already have a workable IDE interface. (Large drive support, support for more types of drives and better IDE handling than some old buggy bios(s)) These are cheap! And you get a handy usb file transfer interface to boot.

[@jfbeam]

The NOINTR driver is smaller because all of the interrupt handling code is omitted. (bit of a Duh there) The other guy likely had huge problems because they set an IRQ when the card doesn't even have one. As others have said, this sounds like a niche project for anyone with the disposable time / cash. (I found what looks like source for linux, but didn't actually look at the code.) The datasheet(s) claim 12Mbps is "supported", but I doubt bit-banging could ever go that fast. I didn't find the unicorn RS232 version, but I did find both US ($4) and AliExpress ($2) "parallel" versions. (which is mostly just the chip soldered to a board with pin headers to access it. would be pretty easy to tie it to any random MCU, or even PC parallel port.)

[@cheater00]

love the bad lip sync at the start it's like i'm watching Kung Faux you should do that more often no joke not even making fun it could be your gimmick haha

[@slincolne]

Have you tried using a USB Hub with this ? It would be interesting to see if it could use a powered hub to drive an external USB hard drive, or possibly multiple thumb drives

[@sdjhgfkshfswdfhskljh3360]

If I understand correctly, hub - is USB device by itself. Which this board or drivers may not like. However, USB isolator with external supply may work. But I did not tried it, because I don't have one.

[@wdd6864]

I just saw there is a new Driver for this device by Freddie V and it makes a huge difference

[@MessalineApghar]

Links ?

[@wdd6864]

@@MessalineApghar Retro Erik has a video on it. The file is on Vogons Server. The video is called USB ISA New Driver

[@MessalineApghar]

@@wdd6864 thanks

[@hamesparde9888]

Can you get Micro Channel versions of this?

[@Captain_Char]

wouldnt it be easier to just use a Gotek floppy emulator with the usb slot, and just divide what you need up over floppy images? it seems a less hassel way to do this, personally though I like the HXC for getting data on old machines

[@DE-GEN-ART]

It's worth the trouble, just to say you did it

[@BadAndUgly]

I lost my serial port ball mouse to my old AT K5 166MHz win98 setup but this doesn't support mice so I ordered a pci card instead, can't wait to play Starcraft on my old setup!

[@jercos]

The hardware is perfectly capable of using mice, in theory a windows 98 driver could be written for this to appear like a USB HCI device to upper layers of windows... but of course, PCI USB card drivers already exist. ;-)

[@BadAndUgly]

@@jercos yeah, that old computer has a few PCI slots available so it was not a hard choice :)

[@xav500011]

Nice Compaq sports cap.

[@bennguyen1313]

Any thoughts how to connect old ISA cards to a modern computer using USB? Or better yet, accessing an ISA chassis (GT7700) from a laptop! For example, Ars Tech makes a 'usb2isa-r', but I imagine one would need to write their own USB driver (Comm Device Class Abstract-Control-Module ) to interface from Windows to the adapter? So if I were to run my XP software from Windows 10, I imagine I'd have to have a custom usb driver that intercepts the program/OS's io read/writes to the ISA interface?

[@jercos]

USB (at least 2.0) isn't fast enough. Any ISA host over USB would be running the latency-critical parts of the drivers needed on the adapter itself. Any drivers on the host side in turn would expect a very low-level interface to the actual hardware, direct I/O or memory mapping, something USB just doesn't have generic semantics for... for any one given ISA device, you can likely adapt that device to work over USB, but doing it for ISA devices in general with drivers on the host side is impossible.

[@Gameboygenius]

I'm guessing the 486 doesn't have PCI? If it does, a regular PCI USB card and Windows 95 might be the best option for that particular machine.

[@damian9303]

I can only assume that the “NO_INTER” version of the driver would mean no interrupt? Since just before, you explain how only a schematic of a revision with IRQ lines exist which isn’t based off the currently sold design

[@BaguetesGarage]

I got the following results of the new driver on a 386SX-25 where I overclocked the CPU (not by much because the Headland chipset doesn´t like it) and the ISA BUS. Also downclocked the CPU using the turbo button before boot and that gave me the same CPU and ISA speeds. The USB Flash Drive is just a generic 2GB AliExpress one, maybe better results can be had with a better model: CPU 25 MHz/ ISA BUS 8 MHz 356,8 KB/s 392,3 KB/s 46,1 IOPS 83,4 IOPS CPU 27,5 MHz/ ISA BUS 8 MHz 367,4 KB/s 403,2 KB/s 42,4 IOPS 76,4 IOPS CPU 25 MHz/ ISA BUS 12,5 MHz 416,7 KB/s 446,7 KB/s 41,6 IOPS 95,2 IOPS CPU 27,5 MHz/ ISA BUS 12,5 MHz 428,5 KB/s 454,6 KB/s 49,0 IOPS 89,8 IOPS CPU 25 MHz/ ISA BUS 13,75 MHz 428,5 KB/s 452,1 KB/s 46,6 IOPS 95,2 IOPS CPU 27,5 MHz/ ISA BUS 13,75 MHz 440,9 KB/s 466,5 KB/s 49,6 IOPS 93,1 IOPS CPU 8 MHz/ ISA BUS 8 MHz 235,9 KB/s 239,0 KB/s 24,5 IOPS 42,7 IOPS CPU 12,5 MHz/ ISA BUS 12,5 MHz 317,3 KB/s 343,6 KB/s 31,1 IOPS 59,8 IOPS CPU 13,75 MHz/ ISA BUS 13,75 MHz 350,4 KB/s 367,4 KB/s 36,2 IOPS 68,6 IOPS

[@macgyver5108]

Pause at 5:59 and that "style" black rectangular IC socket at U4 on the PCB works _PERFECT_ for Arduinos, if it's a 32 pin socket not a 28 pin like this one.

[@matrix008hd8]

10:57 can you tell if this pen drive is one of those that shows the percentage of how much space it is occupying inside if so ... is there anyone who can tell me the model to see more about it.

[@jco997]

Is there like a USB reader that works with a floppy cable? I dont like the idea of having to plug thumb drives in the back of a bulky pc, if I could do it on the front. Speed wont be an issue, since the computer is slow anyways.

[@jiroyamada1139]

You can use a USB extender cable as seen in the video at 14:40.

[@AiOinc1]

We really need a NuBus USB board like this seriously

[@pelucapresidente3858]

Where exactly do you buy these? i saw some on ebay with different components, but they all were from china. There is no USA seller? the tao bao link is broken too

[@wettuga2762]

It would be expected that the seller at least add a mounting bracket (handmade or not) for the price of 35$ as of October 2022. It's an interesting product, but I'll stick to LAN file transfers because I have a box full of ISA/PCI LAN cards, and they work OK with DOS and Windows.

[@michaelc9217]

Can we get a reverse of this card? I need to use an ISA card on a modern computer but can't find a solution.

[@singletona082]

OK not gonna lie. Between this, a CF to IDE card, that serial wifi dongle option, and other nicities and people have gone above and beyond to make sure these old ghosts remain running. I would have loved this in the 90's with my uncle's 486. Sure it can only do flash storage but even then that'ss.... a ton more storage than a floppy.

[@andreslb151]

If the problem of using USB hard disks with this, is the power, will it work with extra power?

[@VeryWarmBear1]

Did you check any of the early 32k, 64k, 128k and 256k sticks. Would have been what was available at the time this card was made and yes the size is in not mb

[@user-wj9xq7ig2v]

There's new faster drivers made by FreddyV on vogons. This little card is fantastic I love it.

[@WhatALoadOfTosca]

Everyone seems to be doing videos on this card this week!

[@fenixlolnope361]

Get a faster isa serial adapter I think.. and that serial thing would be awesome lmao. Don’t they make pci to isa bridges? Why don’t you try one of those out?

[@przemekbundy]

is it possible to make such an adapter to a tube computer. e.g. eniac, edsac. greetings.

[@jercos]

A brand new adapter? Sure, given the right precautions and passives you can interface tubes to standard CMOS circuitry at moderate voltages, and that in turn to modern low voltage CMOS. On the other hand, you could fit some of these room-sized computers on a single CMOS IC, so the main purpose would just seem to be demonstration.

[@richhenry8004]

I think its slow first access as dos is computing space free. And maybe the "NO_INTER" direction means no interrupt.

[@ZiggyTheHamster]

This thing not requiring an IRQ and having a configurable I/O port address means it could work in the PCjr modem slot. If you wanted to hack one in. For whatever reason.

[@tlv1117]

It would be interesting to see what it van do if you hack together a cable that allows you to power a USB device from a separate supply. Probably still only singular storage devices but maybe that could include a cdrom or floppy.

[@ralphshoop8822]

depending on the connector, cables like this exist; my computer shop carries a mini-usb to dual usb-a cable, one of the plugs is power only. I carry them for external usb cd drives

[@systemchris]

Wonder if this could be nicely reversed engineered for KZbins favourite PCB way

[@loginregional]

PRINTERRRRR! how many characters was that in how much time? And bi-directional as well

[@burnutec3]

It is USB 1.1 , dont expect much more than 900k /s , probably much less in real life. Also the usb disk cache is really small so, it will be even slower.

[@supra107]

The video title sounds a lot like a news headline.

[@andresbravo2003]

Worth it better.

[@theoldkidrocker]

does anyone know if this actually works with Dos 3.3 or does it have to be Dos 6.2 ?

[@OpenGL4ever]

If the driver doesn't use HMA or XMS memory stuff it should work with DOS 3.3. And the fact that he's running the driver on an 8088 gives a lot of evidence that it works with DOS 3.3. Because the 8088 can only do real mode.

[@VladoT]

Are there STL files for 3D printing a bracket available?

[@RetroTechChris]

I just designed one.. and would say "where to go to get it," but KZbin keeps eating my comments. If you google search "ISA to USB Bracket" you'll find an STL file that you can 3D print!

[@VladoT]

@@RetroTechChris That's great!

[@superslammer]

These chips are used in all sorts of things from EEPROM burners to USB to Serial adapters. They're quite common. With the schematic, someone could probably fix up something a little better than this. :) Now if you could find a bracket for it.

[@RetroTechChris]

I just designed one.. and would say "where to go to get it," but KZbin keeps eating my comments. If you google search "ISA to USB Bracket" you'll find an STL file that you can 3D print!

[@SwitchingPower]

The EEPROM programmer uses the CH341 and serial adapters use the CH340 chip that is totally different from the CH375 used on this ISA card. you cant change the functionality of totally different chips by changing the schematic

[@superslammer]

@@SwitchingPower Thanks for pointing that out. :)