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Re: DoG's H5 B1 Build
Posted: 09 Dec 2020 17:40
by stephen_usher
The avalanche has started. It's too late for the pebbles to vote. (Or in this case, birdseed.)
Re: DoG's H5 B1 Build
Posted: 12 Dec 2020 21:57
by DoG
Almost all is done. I have to program a 27C4096 and get some connectors for power. I have to double check some jumpers. I have some PLCC MC68000 on order but I can boot it with the DIP 68k for now. It took longer to find all the parts then actual soldering it. Oh, need a battery later on as well.
- H5 B1 Sockets.jpg (329.11 KiB) Viewed 6173 times
- H5 B1 IC fitted.jpg (329.49 KiB) Viewed 6173 times
Re: DoG's H5 B1 Build
Posted: 12 Dec 2020 22:13
by Icky
Looking good @DoG. You need a label printer :)
Re: DoG's H5 B1 Build
Posted: 13 Dec 2020 00:07
by exxos
:bravo: :coolpics:
Re: DoG's H5 B1 Build
Posted: 13 Dec 2020 00:51
by Icky
Is that a 3D printed reset switch cap @DoG?
I looks really good in black.
Re: DoG's H5 B1 Build
Posted: 13 Dec 2020 01:31
by PaulJ
Looks pretty good @DoG . :D
Re: DoG's H5 B1 Build
Posted: 13 Dec 2020 10:16
by DoG
Icky wrote: 13 Dec 2020 00:51
Is that a 3D printed reset switch cap ...
Nope. I bought reset switch and cap from RS Components. But 3D printed would probably be cheaper.
Re: DoG's H5 B1 Build
Posted: 13 Dec 2020 18:55
by agranlund
Wow! That was quickly done :)
Mine is still just the bare board..
Re: DoG's H5 B1 Build
Posted: 14 Jan 2021 15:10
by DoG
So... It's been awhile since I built it. Well, it never started the first time I booted it. Black screen. No signal to monitor. Gotek screen shined though. Reset did nothing but seemed working when measured. I didn't have the time to fix it then. I had a a couple of ocular inspection on it from time to time. But I couldn't find anything obvious faulty with it.
It turned out that nothing was actually wrong with the board.
The recapped PSU I have been using (for over 1,5 years) put out 5.5V and that is not fine for the H5. Well I have used that PSU for a C070859 yesterday and that worked fine. I got it started with a MeanWell PSU I have been using for my Mega and the H5 sprung to life. So a multimeter hooked up to the connector and then screwed down to around 5V made it worked like it should. I'm so glad I didn't start doing a lot of other stuff on the board to get it working.
- Working H5 B1.jpg (478.84 KiB) Viewed 5951 times
- Around 5V.jpg (76.17 KiB) Viewed 5951 times
- Gembench H5.jpg (296.67 KiB) Viewed 5951 times
Re: DoG's H5 B1 Build
Posted: 14 Jan 2021 15:14
by exxos
DoG wrote: 14 Jan 2021 15:10
The recapped PSU I have been using (for over 1,5 years) put out 5.5V and that is not fine for the H5.
Odd.. But yeah 5.5V is a bit high anyway. Is your 70859 board using 2.2K bus resistors or the original ones ?