"SSH or telnet into this thing" You're not going to SSH into an 8088, the crypto would cripple it. Even at 10 MHz!

😃😃😃Muito obrigado por criar este vídeo!!! 👏🏼👏🏼👏🏼👏🏼Eu estou tentando concertar meu commodore 64 🖤⌨️🖤que eu comprei. Ele não pisca o cursor e não funciona o teclado.😢

Lasted one minute, freakin annoying bg music bye

7:47 This may be the quickest "death by deletion" I've seen to date.

i have the more common black version of this, both are now pretty rare and seem to fetch surprisingly high prices, they werent that common back in the day, more common keyboards were DKtronics and Fuller, which were full size cases you put the ZX81s pcb in , making a self contained unit, they could also take the psu pcb...

i bought several of these in the early 2000s recently serviced them and sold them, later UK ZX81 rampacks had a single pcb, marked issue 3, dont know if used in the US, had some of the logic circuitry within a custom chip, the issue1, think only used in the UK, had to have some extra parts on the non component side of one board as they missed them out of the pcb track design, but was otherwise identical circuitry! note these may have one capacitor of different value to specified in the official schematic to allow different speed rams to be used, usually slower types(probably cheaper 😉)

Can someone explain how to run this program on Windows please?

alot cheaper than an actual 386 computer!!! insane what they go for now days.. i was in grade school in the 90's and could buy a 386, 486 or early pentium computer for $5-$20. i used to buy a system every week until my parent's garage was full! then my dad took em all to the dump, i wish i had that gold mine now days!!!

14:00 important keyboard legacy info

Coolest looking Commodore for me but I have yet to see one in the wild.

Would have been cool if it had slightly enhanced functionality relative to the C64... combined with 128 colors this could have been a mind blowing machine.

Those Gateways were solid systems.

It was a rip off, Tramiel being Tramiel.

Na, this is way late to the game. SBCs were appearing in the mid 1970s (e.g. the KIM 1, which even included a keyboard and display on the board).

When I left my last job at a CVS office, my best work buddy and I used my WP-2 to write up a list of really stupid/funny events and conversations we remembered from the 18 months we both worked there. I have an RS-232 port on my PC that I added myself and finally just used an old null modem cable and a terminal emulator to get the document to him today about a year later, haha. Cool little thing from 1989. If you can get the setup to make transferring ASCII text to a PC (will likely need some editing to fix formatting) relatively effortless, then it's still a great and interesting option for anyone that wants to type notes or whatever on the go with no distractions. I love devices that are dedicated to being good at one major function rather than ones that are okay at many, and this is no exception.

Statistically speaking, 16K of RAM is better.

My grandfather put epoxy between the computer and the expansion pack to stop the pack from wobbling and resetting the system bus.

The display goes away not because the ZX81 is doing so much work, it's because modern LCD monitors/TVs go blank if the signal is garbage. On an old TV what you see is black shaky bars. I also recommend you try OTLA fast load, which will turn a 3 minute wav file into a 10 second wav file and load just fine on a ZX81 (only if you are doing it digitally like you are). In fact, OTLA starts with a .p file so you can avoid the tapeutils.jar stuff altogether. Not sure if it runs on Linux, but it does run on Windows.

I used to love these plug-in modules, I used to have a repair business back in the early 80’s and the number of spectrums we took in could almost pay the rent. Any dislodging of a plug-in module (which was easy to do as there was no retaining mechanism) could and often did blow some chips

Shats black box with grill for with rc wire coming out of it in front of your monitor?

No flight simulator? I had that!

The one extra circuit generates a negative voltage. The RAM chips used (4116) require a dual voltage supply (+/- 5 volts). ( see the ZX spectrum ) In addition, the ZX81 outputs the addresses and data in parallel, but the 4116 requires the address signals multiplexed (RAS / CAS). This means that the chip uses the address pins 2x, which means the chip needs fewer pins and is cheaper to produce. Internally, the ZX81 has a static RAM that does not require this logic.

Tractor supply has a nice Precision set

„K“ stands for Keyword 😊

I recall getting a Sinclair Spectrum and opening it up to add an extra 48k of memory. The upgrade kit even came with a dummy practice chip.

well the two bits of installing cardboard explain the overheating

You can hear the spacebar rattle on this machine. I applied a small bit of lubricant to my wp-2's spacebar (chef kiss). It now sounds much better.

That looks so difficult but loads of fun Steve. So glad to have found this channel!

kzbin.info/www/bejne/r4uommeqlK-Ipsksi=_24TLRQ1trzJgBLU Borsh quake for sam at full 6mhz bet its faster than next at 7mhz

That was built at the Timex factory in Portugal. Lot's of Spectrum and Timex stuff came from there.

Chips that size are easy to hand solder - just forget the desoldering braid and use proper flux instead of a flux pen. They are so much easier to hand solder than the tiny surface mount resistors.

Some pic/mg 1.0 backplanes have isa and pci connectors and some of the pic/mg 1.3 backplanes have pcie x16

You need a backplane to get it to work The backplane needs to be pic/mg compliant, Yes pic/mg is a standard just as pc/104 is a standard

Lol that bat file that sits there looping through all the files on the disk is to make it look like your waiting for the computer to complete something while your at work back in the day

WTAF is a "ZEDX81"? Can people not read English? There is NO "ED" in the name of this minicomputer.

The Sinclair machines were such a contrast with Acorn's machines. The ZX81 and Spectrum are so very different from the Acorn BBC Model B and its descendants, not least because they had a fast, ergonomic dialect of BASIC with a built-in assembler.

BASIC simplifies everything. Assembly programming for the ZX81 is just as much of a shitshow as everyone says programming for the Atari 2600 is, very hard and not fun at all. Thank God, that ZX Spectrum is much easier.

Ya that glue is horrible in them will literally rust thru resistors on the board. Had this with 2 I recapped

I follow you on your ham radio channel and I have a question... I know this is an old video, but I also have a CDS 524 and I put in a Trident isa/vga card, my question is I have no video is there another step I'm missing , Thanks in advance!

I used to use one of these with a modem that had an acoustic coupler. I'd use it specifically from payphones for anonymity back in the day. Good times.

I finished two of these. They both work great. Had problems with the second board because I had cheaper sockets and was getting shorts. Eventually put Kawari boards in both and use Ultimate II plus carts for loading software. For Sixty Clone colors went with blue and purple. Your red one looks great.

Dude, I want that gateway that’s like the exact computer that was my first brand new computer from high school

Had a black one a while back and found it quite underwhelming. The case and design are nice, but the actual keys are very low quality, which of course is a major improvement over the chiclet keyboard, but definitely nothing I'd consider good or even mediocre.

The same problem with my c128, which was given to me by a colleague a few days ago, he said that it had not been started since 1990. The LED did not light up and the ignition switch worked normally, but one side did not conduct electricity like yours. thanks to you, I managed to put it together, soldered the contacts on the switch and brought it back to life! Thanks for the instructions and best wishes

The design of that pack is what you could politely refer to as "highly cost optimized" one of the reasons (apart from the iffy mechanical connection) that it's sometimes unstable is that it generates some of the RAM timing using RC networks driving regular 74LS series TTL chips. This makes it highly sensitive to a bunch of things like ambient temperature, the precise voltage of the 5V rail, which vendor supplied the chips and you looking at it in a funny way. That old school DC/DC converter didn't help either - it was needed because the 4116 needs +12V and -5V in addition to the +5V, but generated significant RFI - the metalized coating on the housing kept the radiated interference below the FCC limits, but still induced significant noise onto the internal signals. I looked at a bunch of these things back in the day, and although they did work most of the the ones I checked were running the RAM outside of it's timing specs - typically by violating the tRAH(min) spec. The use of disc ceramics in an RC network for delays is pretty sketchy, too.

The original UK versions didn't come with any of the shielding - just a plastic case

That took me back to 1981 ... have a subscribe.

Many years ago, I made my own 16K expansion. I think my circuit had fewer ICs. I made the multiple voltage part with a 555 timer chip. The voltages other than 5V drew little current.

Continuing my bad habit of commenting on old videos. In case anyone was wondering why RAMTOP was 17408, 16K of ROM = 16384. 1k of RAM is 1024. 16384+1024 = 17408. With the 16K RAM pack installed the internal RAM is disabled so RAMTOP is 16384+16384 = 32768. The reason you keep missing keystrokes is because the ZX81 uses the CPU to drive the screen so it's only available to work on other things, including scanning the keyboard, during the vertical refresh. It's easy to type faster than the computer can register your keystrokes. You'll learn to compensate with continued experience. Near the end of it's production Timex was able to sell the American version, the Timex Sinclair 1000 with 2K RAM, for $50.00 and still make a profit.

It's just ram and and 74ls xxx chips for the address decoder. You had to dind a way to support the ram pack so it didn't hang down on the edge connector. There were after makes 32 48 and 64k packs and some rs232, parallel , voice synthisizer , joystick interfaces and even a disk interface. I had a ts 1000 with 64k rs232 interface and disks running cp/m