dhe

@9640News MDOS is of course private. mdos-ideas - broke. I'm not sure if the last two are just left over links from another era.

Challenge Accepted! 😃

@mizapf any thing new for the MAME, April 1st release?

Hi @9640News I was poking around 9640news.com this morning, and found a number of links, that I think used to work, but now give a 404 error. After the first couple, I used an online broken link checker, and it said:

Gary was released from prison (3/28/2023). He now goes to a transfer facility, then to his final destination, to start life over.

It would be nice if someone could attach both disk images to this thread.

Nice article on the earliest days of Plato. https://arstechnica.com/gadgets/2023/03/plato-how-an-educational-computer-system-from-the-60s-shaped-the-future/

I think there may have been some articles in the ppc newsletter: https://www.rskey.org/CMS/index.php/the-library/14 And the odd user group newsletter.

Wow... These look pretty awesome, for old dudes with bad eyesight try to solder! https://www.aliexpress.us/item/3256804001900020.html?gatewayAdapt=glo2usa4itemAdapt&_randl_shipto=US

So.. slightly amazed that parts would go bad with no reason... Even one as slight as powering on and off. Do the dang things go bad just sitting? 😃

I've seen a number of boards doing this. I have a 6809 SBC I would like to try to build first. I might be asking questions later.... Thanks for the information!

@acadiel do you have an extra dupal you'd like to sell - or where is the best place to pick one up? Thanks, Dano

If anyone here knows how to adjust for timing we would all like to learn how to do that! Please?

Right, that was the problem with the original WHT SCSI controller. Michael Becker fixed that with a daughter board, another way of saying "TI Bus was too noisy" is new parts are too fast, they see dozens of state changes while the TI bus is still getting settled... Fixes for timing issues like that - are way above my head.

@Tursi any news to share on version 4?

It would be interesting to take a PAL with the protection fuse in tact, read it out, then read it with DuPAL to see if the equations look different - even if functionally identical. I had denoted this device in the EPROMS and PALS thread and called it peak reverse engineering. It's really a super device for everyone working on electronics from the 80's and 90's - no more black boxes!

1) Was the protection fuse blown - so... did you have to brute force it? 2) Was you able to take the equations and burn a new working PAL/GAL? Inquiring minds want to know!

The DIGIT AVPC went in the PBOX, so It might be possible. With the new processor for F18A MKII - it might be possible that it has enough cycles and memory to display two screens.

@Shift838 made or makes a PBOX interface card. It's great because it's three parts. Console Interface side, cable and PBOX interface side. If you can get one of those it would make trouble shooting easier, because a bad flex cable can exhibit a lot of different symptoms and is really the weak link. And even worse, since the connection can be weak / not connected / working from one test run to the other, you can end up chasing a lot of ghost - not like a chip that simply doesn't work.

Sounds like the devil's money triangle, CS1 goes in, but because of unexplained phenomena his money disappears! 😃

A while back, I sent an original Wincherster drive that came from Dee Turner, which might have came from Mac McCormick to @Ksarul - we were kind of hoping some McCormick source code might be on it....

I like it! Very nice touch changing the ship if it's moving up or down.

I'm not a hardware guru - there are folks here who are. But, testing the memory will exercise some of the data/address lines, working with the disk controller will use CRU lines and other control signals that just memory will not. If you had a sidecar TIPI, then you could test the cru lines, leaving out the pbox. It's also possible, the 9901 in your console has a problem, and it's not pbox related at all. Do you have another console to try?

Yes. A regular (stock) TI XB cart will try to load a file called DSK1.LOAD when you choose XB from the main menu. Having another disk controller and interface card would be key to figuring out where you problem is. What seems to be a disk controller problem, can easily be caused by a flacky interface card. As I discovered in another thread, the interface card, can be a bugger, because what you think might be a flacky or bad chip, can be a dodgy connection on either end of the fire house.