Kenneth | Feb. 25, 2024

works as described

For RTC ISA 8 bits (Very Low Profile)

Ordered one for a Book8088 v2, works as described and as expected to keep/get/set time & date, works on the port requested (70h) with no issues. Delivered promptly.

Response from aitorgomez.net | Feb. 26, 2024

Thank you for purchasing this product and for this review.

Andy | April 7, 2023

XTSD ISA 8bits - perfect for my Siemens Rolm 80386 PC

For XTSD ISA 8 bits (Low Profile)

Just drop this tiny card in, and you're 100% good to go!

I kept my existing HDD controller and floppy controller. My only tweak was to tell my AMI BIOS to not use 300H for disk, but to use "DOS 1K"

Also, shockingly fast email help from Aitor, the designer/builder/seller.

Looking forward to more great products!

Response from aitorgomez.net | April 7, 2023

Thanks for the review.

Hans | March 13, 2022

Works great in my IBM 5150

For RTC ISA 8 bits (Very Low Profile)

Works exactly as expected. Used the software suggested, pointed it at the correct port, and it just worked. Not having to type in the date and time on every boot is really nice, and this is one of the very few options for real-time clocks these days.

Response from aitorgomez.net | March 13, 2022

Thank you for purchasing this product and for this review.

Jason | Sept. 24, 2021

Amazing support and working great!

For RTC ISA 8 bits (Very Low Profile)

Using this in my "Micro 8088" aka NuXT. Was super easy to solder together. The Dallas Clock came pre-soldered. I had a small issue with the firmware and the battery holder but was able to get it quickly resolved thanks to great support from Aitor the maker and seller here.

If you have any issues with the battery showing up dead in the BIOS just bend up the bottom pin a bit so it presses into the battery better.

Really happy with my RTC. :D

Response from aitorgomez.net | Sept. 24, 2021

Thank you for purchasing this product and for this review.

Bruno | Sept. 12, 2021

Fantastic little add-on for retro PC XT computers

For RTC ISA 8 bits (Very Low Profile)

Great product, absolutely plug and play:
- Plug a battery into the card
- Insert the card in an ISA slot
- Start your PC XT
- Run "DATE" and "TIME" at the MS-DOS command prompt
- Then run "SET_RTC 576" (240h I/O port)
- Finally edit AUTOEXEC.BAT to add "GET_RTC 576"
And you are ready to go!

Response from aitorgomez.net | Sept. 12, 2021

Thank you for purchasing this product and for this review.

Terry | July 1, 2021

I taught my XT computer to tell time!

For RTC ISA 8 bits (Very Low Profile)

I installed the RTC module into an 8 bit slot on my Magitronic XT V20 IBM clone motherboard. I set the date and time using DOS' DATE and TIME commands. I then set the RTC using the command:

SET_RTC 576

Upon reboot I issued the command:

GET_RTC 576

and DOS updated with the correct date and time. It couldn't be easier. You must use the decimal value of the I/O address of the RTC card (576 = 240h) to both set and retrieve the date/time from the RTC card.

The RTC card does not come with a battery but it's easily found in any store as it uses the most common CR-2032 coin cell battery (the same battery used on motherboards for CMOS backup). Make sure you install the battery with the + side up.

If you're looking to add date/time features to your PC/XT/Clone then this little RTC card will do that for you. I highly recommend!

Response from aitorgomez.net | July 1, 2021

Thank you for purchasing this product and for this review.

Nicolas | May 17, 2021

Just what my Tandy 1000 needed!

For RTC ISA 8 bits (Very Low Profile)

I bought one for my Tandy 1000TX, got it configured for 240h and works great with the suggested software. I used Brutman's mTCP suite with SNTP to set exact Internet NTP date and time then update the RTC, now my clock is always correct, a very nice to have addition to my retro setup!

Response from aitorgomez.net | May 22, 2021

Thanks for this review!

Hagen | May 3, 2021

Cruising down Memory Lane

For ZXUno+

Discovered ZXUno+ a few days ago, hunting for alternative FPGA-based emulation devices.
Found that you can actually buy it. And a VGA/DB9 (Joystick) adapter, and a case. Nice! Decided to give it a go.
The small parcel arrived in less than a week (today) here in the Netherlands where we live, very carefully packed. Opened it - the ZXUno+ is assembled and ready to use. Extra nice touch: in the package was also a USB-to-PS/2 adapter. Many thanks!
(This saved me a lot of hunting in my 'lair' for my own. And I had only one, so now I can even attach a mouse! Yay!)

OK. First boot, device connected to a VGA monitor: no image ('frequency out of range'). Device is probably set up for TV (50Hz), my old 4:3 VGA monitor does not like that frequency. Second boot (with an AV-to-HDMI adapter on my main screen) - yes, we have an image! Go into settings (yes, this thing actually has a BIOS setup screen!). Amazed about the number of cores and ROMs. Sooo much to explore! OK. Advanced, Video, VGA, 59.5Hz. Save and reboot. Nothing. Hm. OK, power-cycle. Yes! We have a rock-steady screen image on VGA. Neat!

Must try the Jupiter Ace - I made a core for a Papilio One 500 some time ago, this is the first time I can try my TZXDuino adaptation on the ODROID-GO for tape-in on something that I did not make myself. Worked on first try!
"Big Scroll Demo" runs butter-smooth, the graphics are just perfect, no tearing, no artifacts.
Compliments: this is a much better Jupiter Ace core with VGA output than my own. Looks like I can learn something about FPGA adaptation from its source code! Great! :-)

Hm. There is a Commodore PET core? Tried to update the core. OK, it really needs its specific filename (CORE17.ZX1). But then it worked. It replaces the VIC-20, very good. I call it PET2001.

Power-cycle. Green text on black. Very crisp. Neat!

Then it hits me: "It is 1981. You stand in front of a CBM4016 that is sitting on an overhead projector trolley. This is the first day you are in the after-school computer group. You enter your first BASIC program."

I like the device: the build quality, the amount of thought that has gone into the design, the manual, the BIOS, and the many supported cores and ROMs. This is a device that lets you explore retro computers (not only - but also - games), on modern hardware, with a bit more comfort than in 'the olden days'. Because it emulates the hardware, it feels genuine.

Highly recommended!

The ZXUno+ team have done an amazing job here. You made my day! Many thanks to you all!

(Edit: added country of residence.)

Response from aitorgomez.net | May 3, 2021

Thanks for this review, and I'm glad you like it and that you really enjoy it.

Alex | April 27, 2021

Great product, personal service - amazing seller!

For RTC ISA 8 bits (Very Low Profile)

Very well made RTC board for a retro XT computer. Seller was very accommodating and went above and beyond with finding the right solution for my system. Great product + Exceptional service + Lighting-fast shipping! 5 STARS!!!

Thank you!

Response from aitorgomez.net | April 27, 2021

Thank you for purchasing this product and for this review.

Darren | March 22, 2021

Literally plug in and go

For RTC ISA 8 bits (Very Low Profile)

If you're using this with the Micro 8088 platform then it easily adds the missing RTC functionality. Just plug it into an ISA slot and you're done. In my case I bought the RTC and micro 8088 board from here and haven't been disappointed. Delivery was quick and service very responsive.

Response from aitorgomez.net | March 22, 2021

Thank you for purchasing this product and for this review.

Thierry | Feb. 7, 2021

Perfect board for low profile cases

For Internal OPL3 FM for PCXT

Super good Idea and perfect little board. It fits perfectly in modern cases, using the front panel for connectivity. A treat for your board (using the Monotech NuXT) and a very modest price.

Response from aitorgomez.net | Feb. 7, 2021

Thanks for the review, I'm glad you like it and I hope you enjoy it.

Tsz Hong | Dec. 1, 2020

Very good.

For MonochromeVGA

Work perfectly. The outer case look good and sturdy with the DIP switch hidden inside. My first computer is a 8088 XT with a monochrome display, now I can turn my VGA to look like in the old days. Thanks.

Response from aitorgomez.net | Dec. 1, 2020

Thank you for the review and for your purchase, I'm glad it makes you relive the old days. Let's enjoy it!!!

Nils | Nov. 19, 2020

Great real time clock for a XT

For RTC ISA 8 bits (Very Low Profile)

Though I miss some decoupling capacitors on the board, it works like a charm. Feels so great not to have to enter date and time again and again and again. Great product, highly recommended!

Response from aitorgomez.net | Nov. 19, 2020

The board is so low profile that I have not considered adding decoupling capacitors, because presumably you will already have them very close in the motherboard itself. In any case, thanks for the suggestion, for this review and for the purchase of the product.

Boban | Nov. 16, 2020

A must-have gadget for retro-comp lovers

For MonochromeVGA

Saw this beautiful brain-click on Hackaday. Brightest ideas are always plain simple. Built one piece and played, but bought one just to say thank you to the Author. So - thank you.

Response from aitorgomez.net | Nov. 16, 2020

Thank you very much for this review and for your support of the project.

Miodrag | Nov. 2, 2020

Nice little board

For RTC ISA 8 bits (Very Low Profile)

If you own Micro 8088 then you need this board. Board is very simple in design and can be easy update to work under different address (you need programmer capable of handling GAL chips). Being low profile makes it bit hard to pull out, but it lower the cost.

Response from aitorgomez.net | Nov. 2, 2020

Thank you for purchasing this product and for this review.

Thorsten | July 31, 2020

Works fine in a Commodore PC10-II XT-Clone from 1986

For RTC ISA 8 bits (Very Low Profile)

I just came back from holidays and found this little package from Spain.
After some juggeling around with the jumpers for the hardware interrupts of all the other cards (MFM, Sound, XT-IDE), I first thought I got it running with CLOCK.COM from David_M.(http://www.minuszerodegrees.net/rtc/david_m/CLOCK.zip) as it was suggested in the forum.
BUT: If I don't use the "forced" mode to port 70h CLOCK.COM would freeze my machine.
AND: With forced mode I could only read and write date and time from DOS to RTC, but the RTC would not "tick". It always kept the same hour, minute and seconds.
I wasn't able to determine the cause of that behaviour.
I mailed Spark2k06 about this problem and he patietnly and friendly looked into my problem and provided then a "handwritten" alternative "driver programm" via mail, where you can set the port manually.

This soultion now works perfectly fine!!! :-)

I was looking for this kind of extension card for quite a while.
Thanks a lot for the hardware and the friendly support

Response from aitorgomez.net | July 31, 2020

Thank you for purchasing this product and for this review. There are those who have problems with port 70h due to conflict with some element of their machine, but thanks to the SPLD it is possible to configure it on any other I/O port.

Kheng Meng | April 26, 2020

Very responsive and helpful seller

For RTC ISA 8 bits (Very Low Profile)

Product is a nice addition to systems which only need an RTC. Most other RTC boards are integrated with other functions which you may or may not need and thus you pay for unused features.

With this board, if you need an RTC only, this is the best product for you.

I initially had some issues with using the product with my IBM 5155. Thanks to spark2k06 for the responsive help of spark2k06, I could get it to work.

Do also checkout the vcfed link for details. http://www.vcfed.org/forum/showthread.php?71958-RTC-ISA-8-bits-(Very-Low-Profile)

Response from aitorgomez.net | April 26, 2020

Thank you for purchasing this product and for this review.

Simon | Feb. 19, 2020

Amazing product and seller! Exactly what I needed!

For MonochromeVGA

After weeks of use, I can say that these devices works very well. I am usually a retro computer hobbyist, but this was not the purpose of my purchase. In fact, I had a head concussion a year ago, and I am still suffering from a post concussion syndrome. One of the main symptom is photophobia and blue light is the most armful. With this device, I can fully and physically disable the blue light. Combined with a CRT monitor, my screen time without serious symptoms improved in a very noticeable way. I definitely recommend this device for any retro computer hobbyist or anyone who has photophobia. Also, the seller is very professional and friendly. Thank you!

Après quelques semaines d’utilisation, je dois dire que ces appareils fonctionnent très bien. Bien que l’informatique ancienne soit l’un de mes passe-temps, j’en ai fait l’acquisition dans le cadre d’un syndrome post-commotionnel qui dure depuis plus d’un an, dont l’un des symptômes consiste en la photophobie. La lumière des écrans, et surtout la lumière bleu me cause des symptômes. Avec cet appareil, il est possible de désactiver la lumière bleu d’une manière matérielle, au lieu que par simple logiciel. Cet appareil a fait en sorte que les symptômes à l’écran ont diminué de manière significative, et d’autant plus lorsque combiné avec un écran cathodique. Je recommande cet appareil qui est par ailleurs très abordable. Par ailleurs, le vendeur est très amical et très professionnel. Merci beaucoup!

Response from aitorgomez.net | Feb. 19, 2020

Thank you for purchasing this product and for this review. I'm glad that beyond the functionality of this device, it has also personally helped you deal with the symptoms of this syndrome.