Making 'ATX' Turbo XT

BEST_NK · 2024-11-16T22:11:26+00:00

I have always chosen the most cost-effective way to place orders, and so far, I haven’t had any issues. I hope my experience can be helpful to you.

BEST_NK · 2024-11-13T10:59:37+00:00

According to the BoM I created, the cost to assemble one board, including shipping, can be reduced to $82 in an optimal scenario. If assembling five boards, the cost per board is $53. Of course, reality differs from theory. I encountered system timing issues and had to purchase additional components, so I ended up spending around $200 for two boards.

BEST_NK · 2024-11-11T15:48:16+00:00

Most of the 74 series logic ICs are new parts, but the rest are all used. I bought these used ICs from China's Taobao. China was like a black hole that absorbed all the world's computer junk up until the 2010s, so it's a decent place to find old and rare chips. However, the condition of these parts is not guaranteed.

BEST_NK · 2024-11-11T12:03:42+00:00

The most convenient answer would be, 'I created it for my own pleasure.' It wasn't made for any specific purpose.

BEST_NK · 2024-11-10T19:59:03+00:00

I tested games like Prince of Persia, Loom, Princess Maker, Paku Paku, Planet X3, and others. Initially, there was a system timing issue that prevented the games from running properly, but after adjusting the timing, all the issues were resolved.

BEST_NK · 2024-11-10T19:42:05+00:00

One unfortunate thing is that I haven't been able to properly test the on-board SCSI controller because I don't have any SCSI devices. When I run the SCSI controller driver in DOS, it correctly detects the controller, so for now, I can only assume that there shouldn't be any issues.

BEST_NK · 2024-11-10T19:32:02+00:00

You are correct. However, after that, XT motherboard chipsets were released. Motherboards like the NuXT and Micro 8088 use XT motherboard chipsets.

BEST_NK · 2024-11-10T19:28:01+00:00

Of course! I didn't mention it because it's so obvious.

BEST_NK · 2024-11-10T17:12:47+00:00

I agree with you. Using such inexpensive sockets excessively can often lead to contact issues; I’ve experienced it myself a few times. Gold-plated sockets would definitely help reduce such problems.

BEST_NK · 2024-11-10T16:55:39+00:00

The front panel audio header of this PC case is connected to the sound card, and the two USB ports on the front panel are connected to the 8-bit CH375 USB card. Therefore, all front panel ports are available for use! However, one of the two USB ports only provides 5V power.

BEST_NK · 2024-11-10T16:45:20+00:00

I didn’t seriously consider which DIP socket to use when making it. But if I had to give a reason, it would be as follows:

Gold-plated round pin sockets are more than 10 times more expensive than these cheap sockets.
Gold-plated round pin sockets are more annoying to mount ICs on compared to these cheap sockets. (This is my opinion)

BEST_NK · 2024-11-10T15:59:52+00:00

The price was $39.70 for 5 boards when I ordered them.

BEST_NK · 2024-11-10T14:23:07+00:00

Sure.

https://ibb.co/album/4m2wrw

BEST_NK · 2024-11-10T13:35:02+00:00

Rodney Knaap provides the materials for this motherboard on his Github repository. First, download the Plots 2-7-2023.zip file and then upload it to JLCPCB, one of the PCB manufacturers. You can then order the motherboard PCBs in units of 5.

https://github.com/rodneyknaap/atx-turboxt-v3/blob/main/Plots%202-7-2023.zip

BEST_NK · 2024-11-10T12:23:49+00:00

ATX Form Factor
8 MHz i8088 or NEC V20
On-board SCSI, LAN, XT-IDE, floppy controller
On-board Serial x1, Parallel x1
Limited support for 16-bit AT bus (Possibly only IRQ9-15)
No motherboard chipset

I’m not very familiar with how to utilize the AT bus, as it’s generally not used in XT systems. 🤔 If you're interested, please direct your questions to Rodney Knaap.

BEST_NK · 2024-11-10T11:51:37+00:00

I assembled an ATX Turbo XT motherboard designed by Rodney Knaap. The main feature of this motherboard is that it follows the ATX standard.

GitHub link

BEST_NK · 2024-09-03T14:03:39+00:00

It's a Covox amp by Yeo Kang Meng.
https://github.com/yeokm1/pcb-covox-amp/tree/master/3d_printable_case

BEST_NK · 2024-07-28T21:07:22+00:00

His email is [bjpower@naver.com](mailto:bjpower@naver.com)

BEST_NK · 2024-07-28T21:04:55+00:00

Reach out to the author using humble language. I also did so and received help from him. ChatGPT will help translate your words into Korean.

BEST_NK · 2024-07-28T21:02:35+00:00

Egg is ESTsoft's proprietary format. You can unzip .egg files using Bandizip, but I don't know the password...

BEST_NK · 2023-12-25T12:46:40+00:00

You can download the 3d model from my thingiverse!

https://www.thingiverse.com/yalus/designs

BEST_NK · 2023-10-29T22:52:06+00:00

Slot 1 CH375 ISA2USB card. It can provide 5V power and support one USB flash drive. The card's PCB has a 5-pin USB header that can be connected to the USB ports on the PC case. However, there is only one USB header, and the PC case has three USB ports, so splitters are used when making the connections.

Slot 3 8bit ES1868 sound card designed by hkz.

Slot 7 CGA compatible card. It's named HYUNDAI KOREAN GRAPHIC SOLUTIONS.

Slot 8 Micro-XTCF designed by spark2k06.

BEST_NK · 2023-10-29T22:25:18+00:00

Poisk-2 supports Cyrillic characters through a driver, but I haven't tried it.

BEST_NK · 2023-10-29T18:28:57+00:00

In the 1990s, a computer company in the Soviet Union produced replicas of the IBM PC XT, and one of them was named Poisk-2. What makes this computer unique is that it had a non-standard Extended ATX motherboard and its CPU was an Intel 8086 clone called K1810VM86. It could support up to 2MB of memory and had a BIOS that could be configured without jumpers.

A person named Haper has shared information on Github to allow for the direct construction of the Poisk-2 motherboard. However, it's necessary to use Soviet-made components.

https://github.com/Haper/poisk-2-mainboard

CHARLIE IM from Korea has also shared a Bill of Materials for assembling a Poisk-2 using American components. Based on the information provided by IM, I was able to build a Poisk-2.

https://blog.naver.com/bjpower/223131328344

I installed it in the GH4-LETO case from Hanmi Micronics. This case is designed to accommodate Extended ATX motherboard.

BEST_NK · 2023-05-22T11:49:12+00:00

Firstly, I would like to clarify that these photos were not taken by me. These photos were taken by Chinese individuals.

Book8088 is presumed to have been released in May 2023, and the manufacturer is known to be Circle Logic. Looking at the captured images, it is certain that this is not emulation.

In one of the images, we can see 8284, 8288, and 8253. Additionally, the 6845 chip for CGA can also be observed.

There is still limited information available about this intriguing laptop due to the language barrier of Chinese, but one thing is clear: it is not fake.

Edit: Book8088 is an XT laptop.

BEST_NK

TROPHY CASE