PhilCs H5 A3 build

Share your building progress here!
User avatar
stephen_usher
Posts: 5580
Joined: Mon Nov 13, 2017 7:19 pm
Location: Oxford, UK.
Contact:

Re: PhilCs H5 A3 build

Post by stephen_usher »

Obviously a blue meenie as he doesn't want to share his blueness.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
User avatar
PhilC
Moderator
Moderator
Posts: 6016
Joined: Fri Mar 23, 2018 8:22 pm

Re: PhilCs H5 A3 build

Post by PhilC »

Got my reset problem fixed and got some blue and even green now. Not sure where the black went :lol:
20201031_181032.jpg
20201031_181032.jpg (81.85 KiB) Viewed 3756 times
If it ain't broke, test it to Destruction.
User avatar
stephen_usher
Posts: 5580
Joined: Mon Nov 13, 2017 7:19 pm
Location: Oxford, UK.
Contact:

Re: PhilCs H5 A3 build

Post by stephen_usher »

Trying to make people green with envy using a pull-up? ;-)
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
User avatar
PhilC
Moderator
Moderator
Posts: 6016
Joined: Fri Mar 23, 2018 8:22 pm

Re: PhilCs H5 A3 build

Post by PhilC »

stephen_usher wrote: Sat Oct 31, 2020 6:22 pm Trying to make people green with envy using a pull-up? ;-)
Nah, I'm starting to think there is something wrong with the DAC, so I'll order another from exxos.

Mono mode works great though and everything else works great

Edit:

Definitely thinking something odd eith this DAC as every time I reboot there's a good chance the colors will change :lol: it was a lovely shade of cyan just now.
If it ain't broke, test it to Destruction.
User avatar
stephen_usher
Posts: 5580
Joined: Mon Nov 13, 2017 7:19 pm
Location: Oxford, UK.
Contact:

Re: PhilCs H5 A3 build

Post by stephen_usher »

:lol:
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
User avatar
PhilC
Moderator
Moderator
Posts: 6016
Joined: Fri Mar 23, 2018 8:22 pm

Re: PhilCs H5 A3 build

Post by PhilC »

I've got the H5 on the bench today to try and work out what's broken with it as ive done all the fixes, am using good chips, etc.

This is what I get when we boot to a floppy in medium resolution.
20201105_171646.jpg
20201105_171646.jpg (100.13 KiB) Viewed 3572 times
If it ain't broke, test it to Destruction.
User avatar
stephen_usher
Posts: 5580
Joined: Mon Nov 13, 2017 7:19 pm
Location: Oxford, UK.
Contact:

Re: PhilCs H5 A3 build

Post by stephen_usher »

Is the Shifter not changing res then?
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
User avatar
PhilC
Moderator
Moderator
Posts: 6016
Joined: Fri Mar 23, 2018 8:22 pm

Re: PhilCs H5 A3 build

Post by PhilC »

stephen_usher wrote: Thu Nov 05, 2020 5:56 pm Is the Shifter not changing res then?
No, it stays in low res
If it ain't broke, test it to Destruction.
User avatar
stephen_usher
Posts: 5580
Joined: Mon Nov 13, 2017 7:19 pm
Location: Oxford, UK.
Contact:

Re: PhilCs H5 A3 build

Post by stephen_usher »

Does it look OK if started in low res?

I'm wondering if a data line isn't connected and hence the wrong data is going into a register. Either that it an address line and it's not writing the data into the right I/O port location.

I take it that you've 'scoped all the data and address lines.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
User avatar
PhilC
Moderator
Moderator
Posts: 6016
Joined: Fri Mar 23, 2018 8:22 pm

Re: PhilCs H5 A3 build

Post by PhilC »

And we're fixed.
20201105_203025.jpg
20201105_203025.jpg (90.96 KiB) Viewed 3543 times
RW on the shifter has a fault on the pcb, I fitted a bodge wire from pin 9 on IO port 1 to pin 31 on the shifter and were all up and running, so no wonder things were confused.
If it ain't broke, test it to Destruction.
Post Reply

Return to “H5 A3 USER BUILDS”