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PhilC's H4 Mongrel edition build x 3

Topic for users to share their building progress.
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Icky
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Re: PhilC's H4 Mongrel edition build x 3

Post by Icky »

exxos wrote: 12 Dec 2019 22:59 @PhilC what voltage do you get (on scope) on the RGB lines on the connector ?

So there is a 1.685 DC offset when we have "black". so max is 3.315 - 1.685 = 1.63V... VGA apparently is supposed to have 0.7V max, so we double the input voltage right there.

Its possible the Videl doesn't output a MSB input to the DAC. Will try and scope it tomorrow.
I did scope mine out the other day against an original ST if that helps https://www.exxosforum.co.uk/forum/viewt ... =40#p29711
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PhilC
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Re: PhilC's H4 Mongrel edition build x 3

Post by PhilC »

@exxos I'll try and take some readings on Sunday night as away at the mo.
If it ain't broke, test it to Destruction.
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exxos
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Re: PhilC's H4 Mongrel edition build x 3

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PhilC wrote: 13 Dec 2019 16:33 @exxos I'll try and take some readings on Sunday night as away at the mo.
I think they will end up being the same as Icky's. I need to test my Falcon DAC out, but trying to do as much to flashy software as possible today.
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PhilC
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Re: PhilC's H4 Mongrel edition build x 3

Post by PhilC »

No rush from my point of view, just happy to help.
If it ain't broke, test it to Destruction.
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Re: PhilC's H4 Mongrel edition build x 3

Post by PhilC »

Happy to report the quick delivery of my cpu and simm sockets from the @exxos store, thank you very much.

I've got all the parts I need now to finish the other two boards I have and maybe an extra one when exxos is ready to sell some of his extra ones.
If it ain't broke, test it to Destruction.
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Re: PhilC's H4 Mongrel edition build x 3

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PhilC wrote: 18 Dec 2019 22:19 Happy to report the quick delivery of my cpu and simm sockets from the @exxos store, thank you very much.
I've got all the parts I need now to finish the other two boards I have and maybe an extra one when exxos is ready to sell some of his extra ones.
:bravo:

Yeah, I was gonna get some new boxes made for the few boards I have left, but now the box company needs like 200 boxes for a sensible price and they ramped on like £70 setup fee now, its just ridiculous . I already brought some edge protecting foam for the boards, but I have no idea how to box the things up now :( Even buying sheet card cut to size costs more than boxes. I even looked into polystyrene foam sheets, but have to buy like 2,000 of them.
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Re: PhilC's H4 Mongrel edition build x 3

Post by PaulJ »

Happy new year @PhilC , out of curiosity had any time for the ole 80%er?
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Re: PhilC's H4 Mongrel edition build x 3

Post by PhilC »

No time yet @PaulJ . It's a case of too much to do and too little time.

Wont take long when I do get to it next.
If it ain't broke, test it to Destruction.
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Re: PhilC's H4 Mongrel edition build x 3

Post by PaulJ »

PhilC wrote: 02 Jan 2020 08:15 No time yet @PaulJ . It's a case of too much to do and too little time.

Wont take long when I do get to it next.
So Phil, how many H4's are alive now? Paulj/2, Kodak80/2, Phil/1, Icky/1, derkom/1, and dog/1. I guess that's eight so far unless I missed someone.
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derkom
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Re: PhilC's H4 Mongrel edition build x 3

Post by derkom »

PaulJ wrote: 02 Jan 2020 15:15 So Phil, how many H4's are alive now? Paulj/2, Kodak80/2, Phil/1, Icky/1, derkom/1, and dog/1. I guess that's eight so far unless I missed someone.
Mine is in intensive care, but it's expected to survive. :?

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