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foft

Pokeymax version 3 preorder

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An idea came to mind:

sio audio in -> one pokeymax audio input

sio data in ->potential divider -> other pokeymax audio input

i.e we explicitly mix in some noise.

Much easier to build (two resistors and a wire). 

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9 hours ago, foft said:

An idea came to mind:

sio audio in -> one pokeymax audio input

sio data in ->potential divider -> other pokeymax audio input

i.e we explicitly mix in some noise.

Much easier to build (two resistors and a wire). 

That sounds great. 👍

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12 hours ago, patjomki said:

That sounds great. 👍

I tested this and it works fine to me. I used a 500K pot to test, which allowed adjusting the volume of the 'silent' beeps from nothing to overpowering.

 

With 10/500 ratio it sounds close enough to the original to my ear.

i.e. wired like this:

pin 3 sio --- 490K ohm --- pokeymax audin1 --- 10k ohm --- gnd

pin 11 sio --- pokeymax audin2

 

The exact values are not important, but the ratio of ~2% seems good. Also large enough not to disturb sio data transfers.

 

Of course more improvements would be possible, but this gets the core working well enough. Its also a heck of a lot easier than trying to mod the pokeymax.

 

One bonus of this setup: You'll get the sio interference on devices without an SIO cable, such as FujiNet!

 

@DuddieCould you include this in the user manual install process please?

 

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still best to be on the pokeymax itself as people add and remove the pokeymax or real pokey and using when installing pokeymax in all manner of other devices, pcbs, etc etc.

 

Nice to have an immediate fix though

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8 minutes ago, _The Doctor__ said:

still best to be on the pokeymax itself as people add and remove the pokeymax or real pokey and using when installing pokeymax in all manner of other devices, pcbs, etc etc.

 

Nice to have an immediate fix though

I guess since its mostly interference from data in, this could also be added digitally in the core. The digital option would also have the benefit of working on v2.

 

I did need (want) the analog mixing (or an adc) to mix audio in from tapes though.

Edited by foft

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can smd be stitched on pokeymax pcb in some way then if benefits tapes? a hybrid approach

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3 minutes ago, _The Doctor__ said:

can smd be stitched on pokeymax pcb in some way then if benefits tapes? a hybrid approach

For v1 and v2?

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4 hours ago, foft said:

I guess since its mostly interference from data in, this could also be added digitally in the core. The digital option would also have the benefit of working on v2.

 

I did need (want) the analog mixing (or an adc) to mix audio in from tapes though.

So you mean that you could just do a software update? From my point of view that would be the best solution.👍

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Ok, I’ll add it as an option in the next core.

Edited by foft
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I have this added to the core and it sounds fine to do it digitally. I'll release it probably next week, I want to fix a two tone issue that @Synthpopalooza found/reported first.

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On 8/31/2021 at 8:59 PM, foft said:

I tested this and it works fine to me. I used a 500K pot to test, which allowed adjusting the volume of the 'silent' beeps from nothing to overpowering.

 

With 10/500 ratio it sounds close enough to the original to my ear.

i.e. wired like this:

pin 3 sio --- 490K ohm --- pokeymax audin1 --- 10k ohm --- gnd

pin 11 sio --- pokeymax audin2

 

The exact values are not important, but the ratio of ~2% seems good. Also large enough not to disturb sio data transfers.

 

Of course more improvements would be possible, but this gets the core working well enough. Its also a heck of a lot easier than trying to mod the pokeymax.

 

One bonus of this setup: You'll get the sio interference on devices without an SIO cable, such as FujiNet!

 

@DuddieCould you include this in the user manual install process please?

 

Just one question regarding this hardware solution. Do you still hear sio tape sounds when installed?

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Sio tape sounds are mixed by the analog mixer. So leave that connected. It’s just mixed at a lower level so loud tape sounds are not clipped and the interference isn’t picked up much.

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Will it be possible in the future to programmatically switch on/off the analog mixed/optional and digital outputs? Eg. allow disable analog outputs and enable only digital? 

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5 hours ago, Santyago said:

Will it be possible in the future to programmatically switch on/off the analog mixed/optional and digital outputs? Eg. allow disable analog outputs and enable only digital? 

I’m not sure I understand what you are trying to achieve. Do you mean using spdif only and disabling the analog outputs for some reason?

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Yes, Thats exactly what im thinking :) sorry for my english

 

Another question. PokeyMAX3 have two independent analog outputs? (marked as mixed and optional) or is only additional pins?

Edited by Santyago

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There are 4 analog outputs. One used for pin 37, two used for line level stereo and the other mostly unused (used in xel install for 2nd pokey pin 37).

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On 9/13/2021 at 9:53 AM, Santyago said:

The question is whether it can be controlled in future versions? :)

What are you hoping to achieve?

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Is it still possible to buy a Pokeymax V2 Stereo Auto? I wrote a PM to Duddie over a week ago, but i didn't get no answer.

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8 hours ago, Santyago said:

@foft I wanted to easily enable/disable the internal speakers (via spdif) in case when audio is not connected to monitor.

Ok, I see. An on-off bit for spdif and each dac output is possible. I’ll add it in the next version.

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Which option is best for my Incognito? I use SVid, so I could re-purpose the composite pin for the right channel.

I don't want to drill holes in my 800.

 

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@foft i noticed new firmware build (1.25_20210924) 10M16_fullv3 - changelog is available?

 

fullv3 is for pokeymax3 ?

Edited by Santyago

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How to upgrade pokeymax v3 in pokeycfg? I made 1MB ATR image with core.bin and mount in D4 via Sio2sd. After select upgrade / verify i got error failed to open file

 

Edit: nvm :) succesfuly flashed

Edited by Santyago
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