Agreed! 
Anyways, just to put a closure on this subject, I was able to get scanlines at 800x600@60Hz (and others too) by feeding the circuit with an external power supply and inverting VSYNC signal with a 74HC04! 
BR,
bootsector
I just want to say thanks bootsector for input very helpful
your doing great work its appreciated
Sir Toodles is what tech dreams are made of.
Just a heads-up to anyone wanting one: Iām going to be putting mine up in the āFor Saleā thread soon. Obviously, be aware of the troubles I had with the v1: all sales are final.
EDIT - Sold.
Iām waiting on the new stock. I cannot wait!!! How much is this supposed to run for?
Bringing this back:
Anyone gotten their T-SLG together and tested it out yet? Curious to see what people are finding with display compatibility.
Can I pre order this? I want one ASAP and I want some kind of guarantee.
no preorders there will be more than enough first run was to test waters I believe tootles said he would get them before the 25th but Iām unsure
you might want to check the shump t-slg thread under hardware I think someone put up display specs
Thank you! Iāll keep an eye out! Just been doing some big time shopping.
Im confident in its performance on 640x480 and 1024x768 resolutions with the design that went out; I still have no idea why it didnāt work with your Dreamcast VGA box; those are so simple and standardized that the idea of one not working is pretty crazy to me. Im tweaking the design so itāll also support far more resolutions and sources now that I know the VSYNC and HSYNC polarities are all over the place. The changes Iāve made should allow it to work automagically on both HSYNC polarities, and there is a switch for selecting positive or negative VSYNC.
Which leads me to the order that should be arriving any day now. These do NOT have the tweaks, theyāre the same as the ones that already went out and have problems on other resolutions than those two basic ones. Iām, well, disappointed. I dont feel comfortable selling them because I dont consider the compatability good enough for me to be proud of the work. The tweaked T-SLG (v1.4) is already laid out, and Iāll be placing the order for prototypes tonight or tomorrow morning. Figure 7-10 days for them to arrive and test. If all goes well, Iāll put up the remaining prototypes for sale again and place an order for assembled ones. The design retains compatability with the shields, and also remain bi-directional; there is no āinā or āoutā side, just fit it in where it is easiest. If the price of the kits changes (due to the additional slide switch), it will not go up by more than $1 ($13). I have no idea on potential price for assembled ones, nor ETA.
As a rule, I donāt do preorders. Iām very upfront about how many of what I have available. If youāre interested in a kit, Iāll post up how many I have available when theyāre back. If you want an assembled one, when I have them, Iāll have plenty. I dont feel comfortable holding onto other peopleās money.
Thanks! You guys have been busy over there.
The DC VGA box was weird (and like Masa in the shmups thread, my DC VGA box would work when run through the eBay scaler, but only on the 2 panels that worked with the SLG to begin with), but I was more concerned over the spotty panel compatibility. Out of the 5 I tried, having only 2 that worked was a bit disconcerting. And believe me; I killed the better part of a Sunday testing, repeating, and modifying things to make sure I wasnāt missing anything. There was one point where I had 4 panels in a row, and would move the VGA cable from display to display, just to make sure I wasnāt going crazy. I mean, the DC VGA box is a simple piece of tech, but to simply get no input on so many panels (and the blinking effect on my NEC) had me scratching my head. These panels are all able handle a standard 640x480 @31khz signal, so the T-SLG was obviously causing some form of interference that the electronics in the majority of my screens wasnāt jiving with.
But, Iām not an electronics expert, so Iām not going to assume I know what the problem was. My T-SLG is on its way to bootsector as a I type, so it will at least be in the hands of someone who can perhaps elaborate more than āthis one worked, this one didnātā.
Thatās fair. Iām gonna wait on Model 2 assembled.
Thanks.
Hey Toodles,
Iām not sure if you already found some one to assemble the SLGās but have tons and tons of 1mm thick Plexi/Celifan that works great for bottom of uncased pcb boards my grandfather use to work for Dupont and stock piled the stuff for some reason and then left it all to me
If youāre willing to sell one at cost, Iām interested to see if just driving the OE pins high and low on the 74HC125 chips is a good way to blank/unblank the whole screen for use in display lag testing. (I recently tried with a 4066 that I had in my parts bin, but the result wasnāt so great.)
Thatās a slick idea. Okay, Iāll put the bare PCBs up; I think theyād be about $2.50 for the bare board.
āAnd to Rosser I leaveā¦ this pile of 1mm plastic.ā
-ud
haha the roll is so huge 80 pounds or so I have to waddle it to move it. I use it for all kinds of stuff nothing sticks to it
is the fix something that could be adapted to the current T-SLG? Still havenāt gotten around to doing mine yet.
Not reasonably. Thereās an additional slide switch, additional resistor, and three diodes added to the board.