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  • [Battlezone missiles striking]

  • - Yeah!

  • It might not play Crysis

  • but it does play Battlezone, so I'm good.

  • Oh game over, what? Never mind.

  • [smooth jazz music]

  • Greetings and welcome to another LGR retro computer build!

  • And this time I've got something I've been excited

  • to put together since the moment I heard it existed.

  • We're gonna build the NuXT MicroATX Turbo,

  • an IBM XT-class computer system

  • that functionally wouldn't have been out of place in 1987,

  • but is an entirely new design

  • using modern hardware and components when possible.

  • No emulation, no FPGA recreations,

  • just a straight up IBM PC-compatible

  • with a mixture of brand new and new old stock parts.

  • And this is here courtesy of JD in New Zealand,

  • who runs an online shop there by the name Monotech PCs.

  • He sent along a whole bunch of awesome things actually,

  • all of which I'll be able to use on future projects,

  • so thank you very much sir!

  • But yeah, right now the star of the show

  • is the NuXT: a newly-designed open source motherboard

  • running an 8088 CPU.

  • It's based on a number of other open source projects,

  • with no shortage of them coming

  • from the venerable Sergey Kiselev,

  • and the result is a basis for a phenomenally capable PC XT.

  • Right off the bat there's the DIP-40 CPU socket,

  • accepting processors ranging

  • from a 4.77 megahertz Intel 8088

  • to a 10 megahertz NEC V20, with the ability to switch

  • between three different clock speeds on the fly.

  • The V20 is what JD chose to include here,

  • a nice choice and a popular upgrade

  • for IBM PCs in the 80s that'll run at either 4.77,

  • 7.16, or 9.55 megahertz.

  • There's also a spot for an 8087 math coprocessor,

  • which is completely optional, but he sent one of those

  • as well, so I'm gonna go ahead and plop that in there.

  • As far as RAM, the NuXT includes 832 kilobytes

  • of onboard memory, with a maxed-out 640K conventional

  • and an additional 192K for upper memory blocks.

  • Another standout feature of the NuXT

  • is the integrated XT-CF card interface,

  • with an included 64 megabyte CompactFlash card,

  • completely eliminating the need for a controller card

  • or spinning hard disk.

  • There's also an onboard floppy controller

  • supporting the majority of 5.25-inch

  • and 3.5-inch disk drives, from single density

  • and double density, on up to high density

  • and even extra high density drives.

  • Video output is taken care of as well,

  • with an integrated Trident TVGA9000i SVGA chipset

  • from the mid-90s, one that's register-compatible

  • with VGA, EGA, CGA, and even MDA and Hercules.

  • It's configured with 256K VRAM by default,

  • with sockets allowing for a total of 512K,

  • though running higher-res 256-color graphics

  • on this system is gonna be sluggish.

  • Of course, integrated graphics means

  • you get a 15-pin VGA port for outputting

  • to your monitor of choice.

  • And yeah, this I/O section alone is a nice improvement

  • on the original XT, with a 9-pin serial connection

  • and a PS/2-compatible keyboard port.

  • Plus, the AT2XT-programmed microcontroller means

  • that you don't have to worry about converting AT keyboards

  • to XT scan codes, so no Soarer's Converter is required.

  • As for sound, well, it's an XT PC

  • so you've got the PC speaker, with pins included

  • to add an external speaker if ya like.

  • I'll be adding a sound card using one

  • of the four 8-bit ISA slots though.

  • And yes, it only has four

  • instead of the original XT's eight,

  • but it's a MicroATX board, so there's only so much room.

  • Besides, all those integrated components

  • means you don't need as many slots anyway.

  • Another nice addition are the ROM sockets,

  • with the 128K system ROM using flash memory

  • that saves even without power,

  • meaning there's no need for a CMOS battery

  • to save BIOS settings.

  • And above that is an Option ROM socket

  • presenting ROM upgrade opportunities,

  • also doubling as an EEPROM programmer

  • that can write to compatible chips.

  • Neat!

  • And lastly, the board generates

  • its own negative five-volt rail

  • and accepts a 20-pin ATX connection,

  • so you can use almost any modern power supply

  • without modifying it.

  • Yeah man, the NuXT really is a dream team

  • of retro and modern hardware,

  • making for a nearly all-encompassing PC XT solution

  • in a compact package.

  • But enough with the tantalizingly technical tomfoolery,

  • it's time to put this thing together

  • and play some classic DOS games!

  • Okay, so before we get everything all built,

  • let's make sure that it is functioning first of all,

  • and for that, I've got one of these

  • Focus power supplies by Seasonic.

  • It's a 450-watt, absolutely overkill for what we need.

  • The original XT only had, like, I think 130 watts,

  • but you know, it'll totally do the job

  • and it's one of these nice-looking semi-modular units,

  • so cool by me, let's get this thing plugged in

  • and you only need the first 20 pins on there,

  • the extra four for modern motherboards

  • will not be used here.

  • Just gonna grab a VGA monitor here.

  • This classic Packard Bell will do just fine.

  • Plug that in, plug the power in, and yeah,

  • let's turn it on for the first time

  • and see what happens. [XT beeps musically]

  • Huh, that custom startup beep sounds a little familiar.

  • [Intel sound plays]

  • Yeah, it's like a slowed-down,

  • slightly off-key Intel sound.

  • At least, that's what I'm hearing.

  • Wonder if there's any way to customize that,

  • but yeah, everything is looking good up to this point.

  • We get the Micro 8088 BIOS doing its thing

  • and checking everything out, and yeah,

  • everything is checking out.

  • Even got a little custom greetings here.

  • [chuckles] Nice touch!

  • -Nice.

  • Right, so for the case situation,

  • well, I considered a bunch of different things

  • but ended up deciding on this Apevia X-QPack3

  • Micro ATX Cube Case.

  • I considered using, like, an original IBM clone case

  • from back in the day, but I don't know.

  • The idea of using this in a modern case appealed to me

  • and this particular one appealed to me

  • for a multitude of reasons,

  • mostly just because I think it looks cool,

  • but it's also this white with blue accents

  • that really brings to mind kind of the IBM aesthetic.

  • It's not IBM beige, but blue is definitely their color,

  • so yeah, it looks clean and awesome to me,

  • and it's also got two drive bays up front.

  • Something you're seeing less and less on modern cases now,

  • but yeah, 5.25-inch and 3.5-inch,

  • I'm definitely gonna use that larger one there,

  • and yeah, I don't know, just something

  • about this overall design appealed to me like crazy,

  • from the blue-tinted windows to the form factor

  • and, I don't know, kind of looks like a mini fridge,

  • and yes, it does have a bunch of ports

  • that are gonna be completely redundant.

  • I mean, we can't use USB

  • or these audio plugins on this board,

  • but it does have LEDs and power and reset buttons

  • that are compatible with this board.

  • No turbo button, but that's okay

  • because this is a tri-mode turbo thing,

  • and that's controlled through software.

  • And here's another reason that I really was attracted

  • to this case, and check this out.

  • Look at the way the motherboard mounts in here.

  • Yeah, it goes in there horizontally, not vertically.

  • It's very much the way that the original IBM XT

  • horizontal desktop form factor computers were built as well,

  • so you have the cards going in vertically there,

  • kind of like a test bench as well.

  • It gives me a whole lot of room

  • to just plug and play with all sorts of different cards

  • and add-ons and whatever I wanna do in the future.

  • And yeah, let's go ahead and get the power supply

  • installed in there, and I'm gonna do my best

  • in terms of cable management.

  • Thankfully it looks like this case is pretty well-equipped

  • to get cables and stuff them out of the way,

  • and with that installed

  • underneath the motherboard area there,

  • we'll just get rid of a lot of these cables,

  • especially like the audio and USB headers.

  • We don't need those at all, so I'm just gonna, again,

  • tuck those completely out of sight.

  • And yes, every one of these front panel headers here

  • will have a spot to plug in on the motherboard.

  • Hard drive and power LEDs, reset and power switch,

  • and yeah, that's all that stuff taken care of.

  • Just gonna get the motherboard screwed into place here,

  • and now to make use of that 5.25-inch drive bay

  • on the front here, and I've got a new old stock,

  • IBM personal computer, 5.25-inch, 360K disk drive.

  • Something picked up from Computer Reset, yep.

  • Absolutely new that I wanted one of these,

  • so yeah, we're gonna use it, hope it works.

  • I also got a new old stock floppy disk drive cable here.

  • It is a wide ribbon cable, but, you know,

  • we'll get it out of the way as much as we can,

  • and the front of the case just pulls right off of there

  • and we can get the drive tucked into place,

  • for the most part.

  • See, this is actually configured for optical drives,

  • so it's got one of these toolless plastic locking mechanisms

  • that's supposed to make life easier,

  • but yeah, it doesn't actually do anything

  • for keeping our floppy disk in place,

  • so we will not be using that, but you know, whatever.

  • We'll get the front of the case back on here,

  • and just use some traditional screws.

  • Now, I might install a 3.5-inch disk drive later on,

  • but really, a 360K 5.25-inch is pretty much all

  • that I wanna use with an XT-class machine.

  • All right, ribbon cable power plugged in,

  • and that's that, looking good.

  • Ah, I was really hoping this would look

  • as awesome as it does. [laughs]

  • I think this looks awesome,

  • flat black and flat white, oh yes!

  • All right, well, let's go ahead

  • and get the sound card installed.

  • I'm gonna go with this

  • Lazy Game Reviews Edition AdLib clone card.

  • And yeah, here's another little weird quirk about this case,

  • it has this cover that goes over the screws

  • of the expansion cards.

  • Yeah, you have to unscrew this panel, pull that off,

  • then you can plug things in, screw the card into place,

  • and then, if you want, you can put that panel back,

  • and yeah, I'll put it back.

  • It kind of makes it look clean, I guess.

  • And really, that's about it.

  • I mean, with everything being all integrated

  • onto the motherboard, there's not much else

  • I wanna add right now.

  • Maybe something with a game port

  • and a parallel port down the line,

  • but yeah, that's about it.

  • Just get the disk drive protector out of there

  • and I've got another couple things

  • that I wanted to install on here.

  • I got these neat little custom case badges recently,

  • and I thought it would look awesome

  • on the front of this case with that black floppy drive

  • and white case design,

  • and something about the reflective silver

  • just appeals to me, and yeah, the brushed metal,

  • I don't know, it's got a retro look

  • while also still seeming to me to be a bit sleek and modern.

  • Just gonna put IBM and MS-DOS on here, and yeah!

  • Check that out.

  • Almost like an IBM XT-class machine

  • if it were from "2001: A Space Odyssey"

  • or "Star Wars" or something, I don't know, man,

  • but it's time to get the plastic off the sides.

  • [plastic film crinkling]

  • [continuous cellophane crinklage]

  • -I should've peeled it slower.

  • Yes you should've, but it's too late for that now.

  • Okay, time to get everything plugged in and turned on

  • and here's a slight nitpick I have

  • about the back of the case, there's no I/O panel.

  • The motherboard didn't come with one,

  • but it would be nice to have one of these made

  • as an option, I'd prefer it not to be all open like this,

  • but you know, it's fine.

  • Let's get it turned on and see what we get.

  • [XT beeps musically]

  • Ooh, oh yeah, it is alive.

  • It is looking good, and it's quite quiet.

  • I did actually plug in the front fan.

  • It doesn't need it, but I think it looks cool

  • and it'll keep it cool.

  • Now to get the floppy drive doing its thing,

  • and for that, we just press F1 to enter the BIOS setup,

  • and it is extremely simple on this Micro 88 BIOS here.

  • Very much like the original IBM XT startup,

  • but without the need for diagnostics,

  • setup disk or anything.

  • I tested it out really quick,

  • and it is indeed writing and reading just fine.

  • So let's get a mouse plugged in here,

  • and try out some games and software and stuff.

  • First up here, I'm gonna try the highly useful

  • old-school PC Benchmark, or TOPBENCH,

  • and yeah, as you can see here,

  • it's giving it a score of 11

  • and a few different computer models

  • that are close to it in performance,

  • and how we can use the keyboard combination

  • to change the clock speed on the fly.

  • So here it is on the medium speed,

  • that then takes it down to a score of eight,

  • close to a XT clone, which makes sense,

  • and then you take it down to the slowest one,

  • the 4.77 megahertz NEC V20, and that's a score of five,

  • which is very close to a Tandy 1000 EX or SX,

  • or a PCjr with an NEC V20, so again, makes a lot of sense.

  • And it's just cool to be able to switch between the three

  • using Control + Alt and either minus, plus,

  • or the asterisk on the numpad, it's that easy.

  • It is a V20, though, not an original Intel chip,

  • so as you can see from the 8088 Mile Per Hour demo here,

  • running in the slowest mode is still 9% faster.

  • Yeah, it's just something to keep in mind, and of course,

  • taking it to the maxed-out speed is 55% faster.

  • It's just something to keep in mind,

  • you know, the processor being quicker,

  • and also the video card being a bit newer

  • than what a lot of the XTs had back in the day,

  • so as you can see here, that same demo

  • is just not working properly.

  • This needs an original CGA card

  • and 4.77 megahertz Intel 8088,

  • so it's not gonna do what it needs to.

  • Completely expected in this case,

  • and presumably could be alleviated,

  • but yeah, let's move on to some games.

  • First up, we're gonna try Lemmings,

  • because it was pre-installed on the CF card.

  • ["Let's Go!" by Tony Williams]

  • And I'm running the processor at full speed here

  • and the AdLib is doing just fine.

  • Ah, it's awesome, I mean, it's Lemmings.

  • Of course it's awesome, but yeah,

  • totally playable, much moreso than an original 8088.

  • That is for sure, not quite 286-level or anything,

  • but you know, a whole lot more tolerable nonetheless.

  • All right, another one to try here is 688 Attack Sub.

  • ["688 Attack Sub" by Rob Hubbard]

  • Yeah, I just wanted to try this out,

  • not only because of that ominous AdLib music,

  • but also because it is a 256-color game.

  • Really showing off the VGA capabilities of this card.

  • Again, you can install more VRAM into this

  • and get SVGA and all that,

  • but [laughs] it's just not gonna run very well, so.

  • You know, I might do that anyway just because.

  • Here's an example of a nice game to play on here,

  • Sim City, the original.

  • Got this running in EGA mode here

  • and I'm gonna load up one of my saved cities

  • that I have from when I reviewed the game,

  • and yeah, as you can see, it's loading in here.

  • It's definitely quicker than an original PC XT,

  • but again, you can see just scrolling around the map here,

  • this is the full speed, and if I take you down

  • to one of the slower speeds, well, it's slower,

  • so yeah, it's making a difference.

  • That higher clock speed and V20-ness

  • certainly comes in handy.

  • Even on the slowest speed, it is still quicker

  • than an original 8088.

  • Okay, let's try something else here

  • because I was messing with it on a PCjr lately.

  • Codename: ICEMAN.

  • ["ICEMAN Theme" by Mark Seibert]

  • Mm, more ominous AdLib music,

  • and some nice-looking 16-color graphics.

  • This game is from 1990, and it runs about how I expected

  • for one of this era of SCI Engine games from Sierra.

  • A whole lot quicker than the PCjr I was messing with,

  • for sure, but this is right on that edge

  • of not being something you'd wanna play

  • on a system this speed,

  • or maybe you just don't wanna play it anyway

  • 'cause it's not a particularly great game, but that's okay.

  • Something that does run wonderfully on here

  • is David Murray's Planet X3.

  • Of course, though, I mean, he designed this to run

  • on an original PC for Tandy 1000s and stuff like that,

  • but I'm running the VGA mode here because we can.

  • ["Fight for the Future" by Noah Aman]

  • And yeah, this is an absolute improvement

  • over what it would be running on an actual XT

  • with a VGA card, yeah, this is awesome.

  • Great example of a game to play on here

  • with AdLib and VGA, and it's got just enough speed

  • to be smooth and awesome and just an enjoyable game,

  • without needing to reduce the screen width

  • or turn off transparency or anything like that.

  • Now, for an example of something that isn't very great

  • to run on this speed of a system,

  • but is still technically possible,

  • we have Stunts, AKA 4D Sports Driving.

  • [FM synth motor idling, revving]

  • [chuckling] Yeah, okay, so this is just beyond the limits

  • of this machine, I mean, you know, it runs,

  • but you don't wanna play it like this.

  • Even doing things like reducing the graphics level

  • to the lowest and turning off the sound and everything,

  • you're still gonna get single-digit frame rates,

  • so yeah, something like Stunts, I mean [laughs]

  • obviously it's not gonna be great on an XT-class system.

  • Really needs a 386, but still kind of fun to push the limits

  • and see what it can and can't do.

  • Now, here's something that I wasn't sure

  • if it would run as well as it ended up running,

  • and yeah, it's Commander Keen episode four.

  • ["Welcome to a Kick In Yore Pants In Good Ole Hillville!" by Bobby Prince]

  • Yeah, it sounds awesome,

  • and actually it runs relatively smooth

  • considering this is just an NEC V20,

  • but again, it's really not made for this slow a system

  • and the side-scrolling is obviously a little jittery.

  • It's skipping some frames,

  • and the loading takes absolutely forever,

  • even with that CompactFlash card.

  • But, you know what, I totally would've played this

  • if I had a computer of this speed back in the day, dude.

  • All right, we got another homebrew modern DOS game here

  • and this is Paku Paku by Jason Knight.

  • [Pac-Man sirens blaring]

  • I mean it's Pac-Man, it's gonna work,

  • but I just wanted to test this out

  • because it has this tweaked graphics mode here

  • that doesn't always work on everything,

  • but I mean, for the most part it does,

  • and looks great, sounds great, plays great.

  • It's just a well-optimized game,

  • so that makes sense, unlike something

  • from back in the day that used a tweaked graphics mode,

  • and this is a game called Round 42.

  • And yeah, you end up with this half-height screen

  • and parts of it are corrupt,

  • and of course it's just running too fast as well,

  • even if the CPU is turned all the way down.

  • This really is made for an original 8088 and CGA card,

  • and yeah, that's just how it goes, man.

  • These clone systems, this kind of stuff

  • was common back in the day.

  • There's always trade-offs, and same goes for a game

  • like Atarisoft's Defender from 1983 here.

  • [incredulous laughter] It's way too fast, as expected,

  • and yeah, even cranking the CPU

  • all the way down to that 4.77 megahertz

  • the V20 just runs it a bit faster than intended,

  • so this is the slowest that this computer can go,

  • and it's still running this too fast.

  • And things like this are precisely why

  • I keep all kinds of different DOS

  • and PC-compatible computers lying around.

  • There's always something that needs

  • a little something different,

  • and maybe I'll switch this out to a original 8088 later on

  • so I can have that extra bit of compatibility,

  • but yeah, for now, I am quite happy with this.

  • I'm also quite happy that you can boot from floppy disks.

  • You just press A during the startup of the system

  • and it'll boot up from any kind of bootable floppy,

  • including PC booter games

  • like Microsoft Flight Simulator 2.0 here.

  • Though it's made for older video cards,

  • so you get a similar problem with Round 42

  • in that it's horizontally weird

  • but again, this can be addressed.

  • There's a dip switch on the motherboard there

  • for different compatibility modes

  • for different video cards,

  • and you can just plop in another card

  • and disable the onboard one if you want.

  • Might make some changes later on,

  • but for now, the only one

  • that I want to immediately change is that PC speaker,

  • because that little piezo beeper in there is okay,

  • but I really like the sound of a cone speaker

  • like this one here.

  • I mentioned it earlier, but it does have the pins on there.

  • It's just a standard connection for this,

  • so you can just take out the jumper and plug this in,

  • and hear what it sounds like, like this.

  • [XT beeps sonorously]

  • Oh yeah!

  • It really does sound better.

  • Here's a comparison with California Games.

  • Listen how much more full the cone sounds

  • compared to the piezo beeper.

  • ["California Games" music plays]

  • ["California Games" music plays better]

  • Yeah, that just sounds so much more authentic to me,

  • especially if you get it in the right spot of the case,

  • then it reverberates off of the proper components,

  • and dude, this is just one of my favorite projects

  • in a long time now.

  • I absolutely love the new XT motherboard

  • just as something that's a little bit different

  • from all the other turbo XTs that I already have,

  • and as much as I like the options of FPGA machines

  • and emulation and all that kind of stuff,

  • there's something about original hardware

  • or even just modern modifications to original hardware

  • and homebrew systems like this that satisfy me

  • on a very nerdy, geeky level,

  • and that absolutely is what this is.

  • So if you're interested, do check out Monotech PCs.

  • He's selling them for around 300 bucks,

  • is where they start depending on if you want it assembled

  • or what components and all that,

  • and I'm not sponsored here.

  • I'm not getting any commission.

  • He just sent this to me

  • and wondered if I wanted to do a video, and I did.

  • And it's extremely well-made and professional-looking,

  • and it's absolutely my kind of project.

  • Perhaps it's not your cup of tea, or even if it is,

  • I really hope that you enjoyed seeing it all come together.

  • I certainly had fun making it.

  • But that's all for now.

  • There's new videos every week,

  • so stay tuned if you wanna see more stuff in the future.

  • And as always, thank you very much for watching!

[Battlezone missiles striking]

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MicroATXのIBMクローンを構築する。NuXT Turbo PC (Building a MicroATX IBM Clone: The NuXT Turbo PC)

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    林宜悉 に公開 2021 年 01 月 14 日
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