New ULA is installed and I have to video setting done. As soon as I have the composite mod installed, I'll hook it up n try it.

May the 4th be with you!

Quote from: Chris Savage on May 02, 2026, 07:43 PM

Quote from: granz on May 02, 2026, 06:41 AMYou may also want to pick up a 62256 32K RAM chip and upgrade your TS-1000, per page four of the manual. That may be the best option.

If you don't have a 62256 and need one, I can send you one. I have a drawer of them. Every Z80 system I ever built has one installed. It was just easy to simply split the 64K address space into 32K ROM and 32K RAM.

Sure if its not too much trouble. I'll figure out how to install later.

@granz Yeah, I got the first 2 switches are video only n maybe the mic. It's the 2nd 2 that are memory, but will take your suggestion of off/off first

Just wondered if anyone has a non-electric HDMI switch box? Ones at Walmart are TRASH!!..... I got one and it's hardly been used and now won't work. Theres quite a few bad reviews on it... ONN brand is crap first this box and one 16Gb flash drive, with no idea on its contents since it don't work anymore...

Yeah, and you can get quite a bit of software into 32K of ROM.

On the "office"-type Z-80 systems, the ROM could be used to copy a boot program into upper memory (RAM) and have that switch out the ROM and switch in RAM to lower memory. That is how CP/M got to use all 64K of memory in pure RAM.

Quote from: granz on May 02, 2026, 06:41 AMYou may also want to pick up a 62256 32K RAM chip and upgrade your TS-1000, per page four of the manual. That may be the best option.

If you don't have a 62256 and need one, I can send you one. I have a drawer of them. Every Z80 system I ever built has one installed. It was just easy to simply split the 64K address space into 32K ROM and 32K RAM.

Quote from: JKnightandKARR on May 02, 2026, 01:35 PMThanks SW1/SW2 are for backporch signal mainly so only total of 4 lol

Yep, I was thinking (since all the switches are off in the photos, rather than the on & off that you discovered) that in the worst case, you would only have sixteen possibilities to try. By all means, go ahead and start off with the choice you had, and count through those four possibilities.

Quote from: granz on May 02, 2026, 06:41 AMThe manual is not very clear - it appears that you can only use this with an internal 32K RAM upgrade. But if you go to the product page (https://vdrivezx.com/vla81/) and look at the second picture (the first one showing the motherboard) it shows a Mostek 4118 1K x 8-bit RAM chip. You can see that all of switches are turned off.

I would start off with that configuration (all switches off) and see what happens. In the worst case, you only have fifteen other possibilities to try.  You may also want to pick up a 62256 32K RAM chip and upgrade your TS-1000, per page four of the manual. That may be the best option.

Thanks SW1/SW2 are for backporch signal mainly so only total of 4 lol

The manual is not very clear - it appears that you can only use this with an internal 32K RAM upgrade. But if you go to the product page (https://vdrivezx.com/vla81/) and look at the second picture (the first one showing the motherboard) it shows a Mostek 4118 1K x 8-bit RAM chip. You can see that all of switches are turned off.

I would start off with that configuration (all switches off) and see what happens. In the worst case, you only have fifteen other possibilities to try.  You may also want to pick up a 62256 32K RAM chip and upgrade your TS-1000, per page four of the manual. That may be the best option.

@granz @Chris Savage @MicroNut
https://vdrivezx.com/wp-content/uploads/2019/12/vla81_user_manual_v1.3-1.pdf
Suggestions what to set SW3/SW4 to? I know SW1/SW2 outta be set to ON/OFF for the backporch signal, but kinda confused on the other 2 switches.