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Forum: support.Hardware 20 August 2018, 07:46
Replies: 11
Views: 1,187
Posted By xArtx
The DAC and it’s clock is required for CD audio,...

The DAC and it’s clock is required for CD audio, but not for data.
Forum: support.Hardware 20 August 2018, 07:43
Replies: 4
Views: 498
Posted By xArtx
You can find it with a multimeter. Set it to...

You can find it with a multimeter.
Set it to lowest range resistance, and hunt till you find a short of the lowest possible reading.

I’d check across ceramic capacitors because they can crack,...
Forum: support.Hardware 20 August 2018, 07:41
Replies: 1
Views: 389
Posted By xArtx
Not everything. The CPU, Agnus, Gary, RAM, CIAs,...

Not everything. The CPU, Agnus, Gary, RAM, CIAs, Paula, Denise, and Video Hybrid are probably exactly the same.
The CDTV has an extra microcontroller with specialised IO for the VFD display, maybe a...
Forum: Hardware mods 19 August 2018, 07:54
Replies: 51
Views: 4,398
Posted By xArtx
After 18 months spent on mcu software for my own...

After 18 months spent on mcu software for my own hardware design, then sending prototypes off to others to do the PCB CAD,
I can already see that it would have been easier to learn the PCB CAD...
Forum: Hardware mods 19 August 2018, 07:51
Replies: 5
Views: 1,005
Posted By xArtx
You pretty much guessed it. The 12C509 is an 8...

You pretty much guessed it. The 12C509 is an 8 bit micro of the same family that is used on boards today for Amiga/PS2 kb translation. They would now be typically 16F628/a, and have the same...
Forum: Hardware mods 17 August 2018, 16:27
Replies: 11
Views: 3,115
Posted By xArtx
Does that mean you burn 4 new 64kb EEPROMs?

Does that mean you burn 4 new 64kb EEPROMs?
Forum: support.Hardware 17 August 2018, 16:19
Replies: 17
Views: 1,477
Posted By xArtx
Could you not just check the new display...

Could you not just check the new display resolutions with the right Workbench disk?
Forum: support.Hardware 16 August 2018, 23:31
Replies: 1
Views: 310
Posted By xArtx
It’s the Oki MSM6424B RTC that provides 12/24 Hr...

It’s the Oki MSM6424B RTC that provides 12/24 Hr clock modes.
Maybe this is slightly different from RTCs used in other Amigas, or the other ROM software just doesn’t have to write to the VFD display...
Forum: Hardware mods 16 August 2018, 23:17
Replies: 11
Views: 3,115
Posted By xArtx
Why not use a real Kickstart (or at least single...

Why not use a real Kickstart (or at least single EEPROM) ?
https://www.youtube.com/watch?v=W20FK95aMoY
Forum: support.Hardware 22 July 2018, 17:43
Replies: 3
Views: 335
Posted By xArtx
I’m thinking it would be easer to make a change...

I’m thinking it would be easer to make a change to that part, than the entire folded tinplate shield.
They’d have known it was capable of doing S-Video for example.
Forum: Hardware mods 19 July 2018, 10:50
Replies: 1
Views: 646
Posted By xArtx
Thought I might as well dump an EEPROM from a...

Thought I might as well dump an EEPROM from a board too.
I have no idea what was on this in terms of game titles though (if anything).
Forum: support.WinUAE 19 July 2018, 07:32
Replies: 4
Views: 6,623
Posted By xArtx
Old thread, but I have had to do this for the...

Old thread, but I have had to do this for the last ten or so years.
The first thing is says is I have no ROM file, even though it was selected and the configuration saved last time I used it.
Then...
Forum: Hardware mods 19 July 2018, 07:24
Replies: 1
Views: 646
Posted By xArtx
Multi EEPROM Selector for CD32

There ya go:


.. err... wrong section. Should be in one of the sub-sections, and can’t seem to delete. Oh well.
Forum: support.Hardware 03 June 2018, 19:33
Replies: 10
Views: 628
Posted By xArtx
It’s a bit risky just trying to jump with solder,...

It’s a bit risky just trying to jump with solder, but stripped mod wire is doable.
But yuk. Maybe a 0 or 1 Ohm resistor would be better.

This is all assuming you’re not going to just buy a...
Forum: support.Hardware 03 June 2018, 19:26
Replies: 10
Views: 628
Posted By xArtx
Hang on, don’t do that, it doesn’t work. ...

Hang on, don’t do that, it doesn’t work.

Having technical difficulties. Please bear with me :D
Forum: support.Hardware 03 June 2018, 19:22
Replies: 10
Views: 628
Posted By xArtx
I would leave the old one there rather than...

I would leave the old one there rather than removing it and linking the footprint with solder
because it looks like there’s another trace between that. I don’t think it great to blob solder straight...
Forum: support.Hardware 03 June 2018, 19:17
Replies: 10
Views: 628
Posted By xArtx
Yes, if it doesn’t measure a fraction of an Ohm...

Yes, if it doesn’t measure a fraction of an Ohm resistance it’s bad.
It should be a DC short circuit, and buzz the continuity test with a meter.
When that’s a thru hole component, it’s literally a...
Forum: support.Hardware 03 June 2018, 15:07
Replies: 15
Views: 1,019
Posted By xArtx
If any of those other keys I mentioned actually...

If any of those other keys I mentioned actually work, then the break in in the membrane in the same row between a working one, and the first non-working one (and not in the ribbon cable part or on...
Forum: support.Hardware 03 June 2018, 15:04
Replies: 15
Views: 1,019
Posted By xArtx
When you look a the big chip on the back of the...

When you look a the big chip on the back of the small keyboard controller PCB, the dot in the corner of the chip is pin 1, and you count pins counter-clockwise from there.
Forum: support.Amiga Forever 03 June 2018, 11:59
Replies: 52
Views: 11,978
Posted By xArtx
Foobarred means that for some years, the Cloanto...

Foobarred means that for some years, the Cloanto ROMs were modified to contain illegal CPU op-codes so that they would work fine with an emulator,
but couldn’t be burned to EPROM to use in a real...
Forum: support.Hardware 03 June 2018, 11:18
Replies: 10
Views: 628
Posted By xArtx
discontinuity for pin 2 would have the exact...

discontinuity for pin 2 would have the exact effect you describe. You’d loose horizontal mouse movement, and also the down direction if a joystick was in it.

It depends what part you think E356...
Forum: support.Hardware 31 May 2018, 13:26
Replies: 15
Views: 1,019
Posted By xArtx
Don’t forget the down button, question mark,...

Don’t forget the down button, question mark, period, and comma.
Anyway you have to trace continuity from the keyboard membrane back to pin 32 of the keyboard controller.
Forum: support.Hardware 29 May 2018, 19:53
Replies: 28
Views: 2,236
Posted By xArtx
To change an Amiga properly between PAL & NTSC...

To change an Amiga properly between PAL & NTSC there are two parts to change,
the colorburst crystal, and the master oscillator, as well as setting the jumper to tell Agnus.
It’s the cloudburst...
Forum: support.Hardware 07 May 2018, 15:25
Replies: 10
Views: 628
Posted By xArtx
It’s hard to find a good photo to see anything. ...

It’s hard to find a good photo to see anything.
What about if you short it’s supply after it’s been powered off? Does that allow it to be powered on working quicker?
It could be that it needs...
Forum: support.Hardware 08 April 2018, 15:37
Replies: 11
Views: 725
Posted By xArtx
If the CD drive acts up, open the lid, place some...

If the CD drive acts up, open the lid, place some white card or paper in front of the lens at 45 degrees facing you so you can see the laser safely. place some card, paper or other object down the...
Forum: support.Hardware 08 April 2018, 15:30
Replies: 17
Views: 1,311
Posted By xArtx
If you can get a single colour analogue video...

If you can get a single colour analogue video signal from either the expansion port or TP9, and connect that, allong with ground to a composite monitor, it will tell you whether or not capacitors...
Forum: support.Hardware 08 April 2018, 15:22
Replies: 10
Views: 628
Posted By xArtx
Probably more likely the shift register, but the...

Probably more likely the shift register, but the 4.7k resistor pack R370, that is holding all of the pins high is worth checking first (and the PCB traces to and from it).
Forum: support.Hardware 25 March 2018, 10:18
Replies: 7
Views: 612
Posted By xArtx
http://www.amigawiki.de/dnl/schematics/CD32_R3.pdf...

http://www.amigawiki.de/dnl/schematics/CD32_R3.pdf

I have no idea why the reset line would end up pulling the
keyboard clock signal low, or if it’s just a schematic error.
The Ricoh part in the...
Forum: support.Hardware 17 March 2018, 03:00
Replies: 15
Views: 998
Posted By xArtx
For all Amigas, composite, RF, and S-Video...

For all Amigas, composite, RF, and S-Video signals
are derived from analogue RGB internally.
If any of those work, so does analogue RGB.
There’s only a few places to look if you don’t see it ...
Forum: support.Hardware 11 March 2018, 07:19
Replies: 9
Views: 1,034
Posted By xArtx
What revision Kickstart do you have? Is it...

What revision Kickstart do you have? Is it original? 3.1 isn’t a Kickstart revision.
The revision is shown in Workbench in the About section, or for original ROMs, it’s printed in the ROM chip...
Forum: support.Hardware 04 March 2018, 23:51
Replies: 31
Views: 1,491
Posted By xArtx
It doesn’t look to me like what WinUAE does, but...

It doesn’t look to me like what WinUAE does, but you can take a look.
The palette may not be the same here, but the data is.
Forum: support.Hardware 04 March 2018, 23:08
Replies: 31
Views: 1,491
Posted By xArtx
You can’t see ID registers without writing some...

You can’t see ID registers without writing some software to address them.
Gayle ID for example is at about 0xDE0xxx IIRC.
I meant looking around the chip physically, or the chip itself.

But...
Forum: support.Hardware 04 March 2018, 09:23
Replies: 31
Views: 1,491
Posted By xArtx
Lisa is a video chip that would seem to relate to...

Lisa is a video chip that would seem to relate to your logo problem.
It looks like one or more bitplanes are missing out of that area, and would have suspected memory there,
but it appears Lisa is...
Forum: support.Hardware 03 March 2018, 19:25
Replies: 31
Views: 1,491
Posted By xArtx
Or ROM, is it a mask ROM, or burned EPROM?

Or ROM, is it a mask ROM, or burned EPROM?
Forum: support.Hardware 03 March 2018, 07:42
Replies: 31
Views: 1,491
Posted By xArtx
cdstrap makes a copy of NVRAM to RAM to check a...

cdstrap makes a copy of NVRAM to RAM to check a reserved area for settings such as Language, and perhaps audio CD player settings,
but that can be erased/reset in the language selection screen and...
Forum: support.Hardware 03 March 2018, 07:07
Replies: 31
Views: 1,491
Posted By xArtx
NVRAM area can be accessed without any CD ever...

NVRAM area can be accessed without any CD ever being in the drive from the menu, but no program you are booting can access it before it’s running anyway, and no program I’ve seen can clear the...
Forum: support.Hardware 03 March 2018, 06:39
Replies: 31
Views: 1,491
Posted By xArtx
Changing the 3 or 4 electrolytic caps along the...

Changing the 3 or 4 electrolytic caps along the same row as the alignment pots will also change the alignment of the CD drive. The caps are within a few percent tolerance or so of the value actually...
Forum: support.Hardware 12 February 2018, 21:02
Replies: 13
Views: 5,119
Posted By xArtx
The 14MHz_A signal is output directly from Agnus,...

The 14MHz_A signal is output directly from Agnus, which will be the master clock frequency divided by two (so not exactly 14MHz, but close).
So basically a separate system clock that may or may not...
Forum: support.Hardware 12 February 2018, 20:49
Replies: 13
Views: 5,119
Posted By xArtx
All port, expansion, chip, and external socket...

All port, expansion, chip, and external socket pinouts are pretty clear in the schematics for each model:
http://www.amigawiki.de/doku.php?id=en:service:schematics
Forum: support.Hardware 12 February 2018, 19:01
Replies: 4
Views: 1,025
Posted By xArtx
Every Amiga keyboard was made by a third party. ...

Every Amiga keyboard was made by a third party.
The A1000 keyboard works with CD32, as does A500 if you want an ugly bare keyboard sitting externally,
and any other external one, it’s just a matter...
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