Search found 268 matches

by cheshirenoir
Sun Apr 02, 2023 12:39 am
Forum: Hardware
Topic: PCB what your experience
Replies: 7
Views: 1524

Re: PCB what your experience

I use JLCPCB. They do a $10 shipping option if you're happy to wait. That's what I always use :-)
I've also used Seeed Studio (Yes, three 'e's) but as I tend to order 4 or 5 PCB sets at a time, JLCPCB ends up being the cheapest option.

John
by cheshirenoir
Mon Mar 20, 2023 11:45 pm
Forum: Introduce yourself!
Topic: Hello From Canada
Replies: 7
Views: 1719

Re: Hello From Canada

Hi @raritynine, I recently built a new transformer for my CreatiVisions, which was an interesting learning experience (I hate hate hate working with high voltage AC). If you have any questions, ask here and I'll see what I can do to help :-) (I have always told people that the CreatiVision feels lik...
by cheshirenoir
Tue Mar 14, 2023 9:48 am
Forum: Hardware
Topic: Is this a factory mod?
Replies: 11
Views: 1545

Re: Is this a factory mod?

Well, the Xtal for the TMS9929 is totally shot, so I've ordered a replacement for that. (There were char marks on the board from whoever was here before me, the plastic on the package was melted and 2 tracks were lifted.) Phi0 seems to come and go randomly, which is not confidence inspiring. I might...
by cheshirenoir
Sun Mar 12, 2023 7:54 am
Forum: Hardware
Topic: Is this a factory mod?
Replies: 11
Views: 1545

Re: Is this a factory mod?

When I checked, all address lines seemed to be stuck at high, so presumably FFFF.
This could be the excuse to get a logic analyser I have been looking for :-D

John
by cheshirenoir
Sun Mar 12, 2023 3:29 am
Forum: Hardware
Topic: Is this a factory mod?
Replies: 11
Views: 1545

Dead Creativision (Was: Is this a factory mod?)

OK so I have swapped over the 6502 into my Apple IIe and it boots fine, so it's not the CPU. (I also tried it with the MegaSDCart, with no change) Looking at the schematic, there's a lot of things hanging off that data bus and, of course, none of them are in sockets :-/ What's the startup order for ...
by cheshirenoir
Sat Mar 11, 2023 1:52 pm
Forum: Hardware
Topic: Is this a factory mod?
Replies: 11
Views: 1545

Re: Is this a factory mod?

Thanks for that Tom,

PHI0 has a 2MHz clock,
RESET is going HIGH after a short delay. Presumably that's all "sane"...

I guess I'll need to pull the 6502 and look for a spare... I'll check if the one in my Apple is socketed...

John
by cheshirenoir
Sat Mar 11, 2023 10:40 am
Forum: Hardware
Topic: Is this a factory mod?
Replies: 11
Views: 1545

Is this a factory mod?

Trying to repair a 700305H revision motherboard that has been "attacked" by the previous owner. So far I have replaced the track they lifted near the power supply connector, desoldered and resoldered properly the power connector itself and cleaned up a burn mark near the crystal. This I don't know w...
by cheshirenoir
Fri Mar 10, 2023 2:16 pm
Forum: Homebrew software and hardware (excluding games)
Topic: adaptor for Colecovision
Replies: 6
Views: 1263

Re: adaptor for Colecovision

At least you'd be able to reuse the TMS Video chip if you can HALT the Z80 I guess.
One less component.