I have both controllers 6500 and 6580 with the XTIDE BIOS installed. After adding the missing components and flashing the BIOS, both work without any issues.
First, I configured the BIOS and then flashed four copies to the EPROM memory.

Have you tried with a 28C64?

megatog615 wrote on 2025-01-14, 13:55:

Have you tried with a 28C64?

Because you dont want you use more upper memory thatn necessary?

douglar wrote on 2025-01-14, 13:59:

megatog615 wrote on 2025-01-14, 13:55:

Have you tried with a 28C64?

Because you dont want you use more upper memory thatn necessary?

no because it's all I have 😅

megatog615 wrote on 2025-01-14, 16:21:

no because it's all I have 😅

If you have any <= 28.8 modems, you can often salvage useful eeproms.

Turns out the issue that I had on my last attempt was that the 27C512 EEPROM that I was using had a broken leg. Wasn't bent. Just wasn't there. Snapped off at the plastic. Must have popped off at the last insert.

So I configured a 12K image of XUB r630 386L for 32 bit VLB access, put a single copy of it on an M27C256B eprom, and it worked. The system boots loads XUB!

Wouldn't be retro computing without headaches though. The system wasn't stable. Would lock up in the BIOS with or without the ROM if I tried to detect the CF. Would fail 1/2 through booting from floppy. I cleaned contacts, adjusted isa clocks, messed with shadowing, found no luck. I switched to a different CF and everything seems to work now. Strange. I tried a couple CF's and they all work. It just doesn't like that one Samsung 512MB CF. Anyway ....

XUB gives me 2800KB/s in speedsys buffered reads while the 6500 dos driver only gives me 2700KB/s in speedsys buffered reads, so that's a win for XUB.

So you didn't need the 74LS chips?

megatog615 wrote on 2025-01-16, 13:13:

So you didn't need the 74LS chips?

I put a 74LS chip on the board.

Which one? 74LS244 or 74LS138?

megatog615 wrote on 2025-01-16, 14:10:

Which one? 74LS244 or 74LS138?

I added both. You can see my card here:

https://theretroweb.com/expansioncards/s/qdi-qd6500a-vl-v2

Pin 1 was broken on the 27C512