hehe dexterff8 lets goooo 😉 btw do people choose gold fingers on the pcb, or just the cheapest options from where you order?

more tests with mini isa and ROM BOOT

https://drive.google.com/file/d/1EK7ekZ7ibwao … ?usp=drive_link
https://drive.google.com/file/d/1f63PBgnN63Dg … ?usp=drive_link
https://drive.google.com/file/d/1PPR-G0w3KxQy … ?usp=drive_link

Another YT video about this little board. (not my video) https://www.youtube.com/watch?v=wHb3r4WZmLE

great thank you!

hi, i build the mini card. with the provided 386_2DRV.BIN is working. but if i try to flash new bios from www.xtideuniversalbios.org its not booting (27c64, 27c128,27c256 burned with T48). what am I doing wrong?

gylu wrote on 2024-10-04, 20:31:

hi, i build the mini card. with the provided 386_2DRV.BIN is working. but if i try to flash new bios from www.xtideuniversalbios.org its not booting (27c64, 27c128,27c256 burned with T48). what am I doing wrong?

Have you remembered to configure the downloaded BIOS with XTIDECFG.COM before flasing it, as per the instructions?

All BIOS binaries available here must be properly configured with the configuration tool XTIDECFG.COM before flashing/programming to ROM. In addition to configuring the BIOS file for use with your specific hardware you must also make sure the file is checksummed by saving the file to disk as that will create the padding and checksum required for installation in a computer.

hey wiretap is there a way to buy a completed one from you? i just came across this and would like to get one of you're boards no one else seems to make them and i really dont want to spend $70 on a xt-ide for the 8 bit boards with stuff i won't use because i have 16bit/32bit ide onboard

Unfortunately I do not build these boards and sell them. I wish I had the time to though. Anyone else can build and sell them as they wish, so hopefully another member can build a few to sell. Otherwise, they're really cheap to order the PCBs from JLCPCB to build your own.

Xargon321 wrote on 2025-02-28, 05:38:

hey wiretap is there a way to buy a completed one from you? i just came across this and would like to get one of you're boards no one else seems to make them and i really dont want to spend $70 on a xt-ide for the 8 bit boards with stuff i won't use because i have 16bit/32bit ide onboard

I like the simplicity and elegance of the new built cards, but there's still a lot of used options.

If your system does 16 bit, there are still plenty of affordable ISA NIC cards. Maybe not the $10 price point so much any more, but there's a lot of options under $25.

If you have to have an 8 bit card, maybe you could hijack an old MFM controller and jumper it to disable the controller?

Don't have a chip programmer and just getting the boards to me would be 20$ shipping i could use the one that you can flash in the pc maybe sell me a kit? I can build it just don't have all the stuff

ia2115 wrote on 2024-09-12, 06:39:

hehe dexterff8 lets goooo 😉 btw do people choose gold fingers on the pcb, or just the cheapest options from where you order?

I live in Brazil and here it is always the cheapest option, but I made 15 pieces of xtide with gold plated terminals

dexterff8 wrote on 2024-09-06, 20:52:

here is a .ROM to put on the mini iza board and play PONG soon more tool for RAM testing ;) […]
Show full quote

dexterff8 wrote on 2024-09-06, 00:48:

Let's throw some peppers here at this project to see if people get excited, I'm creating a board with an options menu and some utilities, format tools, ram test, video, among others, I already have something functional but it's still progressing....

here is a .ROM to put on the mini iza board and play PONG
soon more tool for RAM testing 😉

https://drive.google.com/file/d/1KQrS3PsX2AVX … iew?usp=sharing

(((SUCCESS !!!!))) now running MSDOS and I made a menu with 17 options for you to put whatever you want in 7MB of FLASH NAND ROM
questions why 17 and why 7MB
17 so that it can be compatible with CGA and VGA and 7MB for this ROM is worth 2$, now we have our PC_XT GAME CARTRIDGE
soon PC_AT

https://drive.google.com/file/d/1swTgTTpLMAnJ … iew?usp=sharing

dexterff8 wrote on 2025-03-06, 14:11:

(((SUCCESS !!!!))) now running MSDOS and I made a menu with 17 options for you to put whatever you want in 7MB of FLASH NAND ROM […]
Show full quote

dexterff8 wrote on 2024-09-06, 20:52:

here is a .ROM to put on the mini iza board and play PONG soon more tool for RAM testing ;) […]
Show full quote

dexterff8 wrote on 2024-09-06, 00:48:

Let's throw some peppers here at this project to see if people get excited, I'm creating a board with an options menu and some utilities, format tools, ram test, video, among others, I already have something functional but it's still progressing....

here is a .ROM to put on the mini iza board and play PONG
soon more tool for RAM testing 😉

https://drive.google.com/file/d/1KQrS3PsX2AVX … iew?usp=sharing

(((SUCCESS !!!!))) now running MSDOS and I made a menu with 17 options for you to put whatever you want in 7MB of FLASH NAND ROM
questions why 17 and why 7MB
17 so that it can be compatible with CGA and VGA and 7MB for this ROM is worth 2$, now we have our PC_XT GAME CARTRIDGE
soon PC_AT

https://drive.google.com/file/d/1swTgTTpLMAnJ … iew?usp=sharing

https://drive.google.com/file/d/1F29UJLU73mYi … ?usp=drive_link

dexterff8 wrote on 2025-03-06, 14:11:

17 so that it can be compatible with CGA and VGA and 7MB for this ROM is worth 2$, now we have our PC_XT GAME CARTRIDGE
soon PC_AT

I guess prince of Persia did fit on a floppy

At the risk of sounding greedy, is it possible to do a larger rom?

If you add bank switching, you could have as large a rom as you want to expend page counters for.

Ok, I think this would be fun to have with Speedsys, HWinfo, and Norton

Can you still have IDE drives in the system with the disk on chip? Does it take a drive letter?

douglar wrote on 2025-03-08, 21:18:

Ok, I think this would be fun to have with Speedsys, HWinfo, and Norton

Can you still have IDE drives in the system with the disk on chip? Does it take a drive letter?

Yes, you can add a driver letter and it works perfectly with other drivers. Regarding the size, I think 8MB is already a good size, 128 64K banks, since the HDDs were 10MB, but I think it would be possible to extend the 32MB limit of FAT 32 and DOS 3.1.

dexterff8 wrote on 2025-03-12, 13:11:

douglar wrote on 2025-03-08, 21:18:

Ok, I think this would be fun to have with Speedsys, HWinfo, and Norton

Can you still have IDE drives in the system with the disk on chip? Does it take a drive letter?

Yes, you can add a driver letter and it works perfectly with other drivers. Regarding the size, I think 8MB is already a good size, 128 64K banks, since the HDDs were 10MB, but I think it would be possible to extend the 32MB limit of FAT 32 and DOS 3.1.

Here is some reading I found helpful to get more history on the DOC-- https://www.os2museum.com/wp/diskonchip/

The best price I could find for a DOC was $10. I can live with that but finding a card that takes DIP32 ROMs seems like it might be more challenging.

douglar wrote on 2025-03-12, 16:54:

The best price I could find for a DOC was $10. I can live with that but finding a card that takes DIP32 ROMs seems like it might be more challenging.

IIRC there are 5V UV EPROMS that go up to 4MB, but they're 42-pin DIP. Obviously you'd need a GAL or similar (like what is shown on the DOC) to handle bank switching.
(The ROMs are also 16-bit so you need a couple of demultiplexers to turn them into 8-bit).

A small sram and another eeprom can do the bankswitch dirty work.

Write your logic output as the byte values inside the eeprom, then catch the switch with mem-mapped sram. Use the sram's data lines to drive the address lines on your eeprom, and the eeprom's data lines to drive chip select lines.

Cheaper, but slower. In theory though, gives you many more outputs.