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The 8-Bit Guy

Petscii Robots port in the works

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I spent some time the last few days converting Petscii Robots over to the X16. It's now more or less fully functional. Well, you can play the game from beginning to end, anyway.. But it still lacks sound, and it is using the default font, which I hope to change soon to the PET font, which will make it look nicer. It also lacks a lot of effects like screen-shake, EMP flash, etc. I'll be working to add those in over the next few days. Also, since the game is designed for 40x25 screen, there is some black area at the bottom.
That being said, once I get this version completed, I'll slowly begin the transition to a custom graphic version for the X16 as originally promised, which should fill the whole screen.

image.png.e23fe29af2a4428c37e45906672a3b5b.pngimage.png.aa177637562e6bcce2178f237450520c.png

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I am happy to see an X16 version after all. It’s encouraging for all of us who are trying to develop programs for this platform as well.

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@Perifractic While it's nice to hear that the board & the program are enjoying each other's company, there's such a thing as TMI.

Edit: Ooh! That's what you meant to say. Well that's all right then.

Edited by BruceMcF
see below
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21 minutes ago, BruceMcF said:

@Perifractic While it's nice to hear that the board & the program are enjoying each other's company, there's such a thing as TMI.

Lol! Awkward autocorrect corrected!

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Awe now I wanna see what was said originally haha.

VERY happy to see Petscii Robots running on real hardware, that's wonderful!

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@The 8-Bit Guy this looks beautiful! Also watched video of game running on real hardware - success!

PS: Welcome back! It's great to have you here on this forum. Hoping to read more of your posts.

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10 hours ago, m00dawg said:

Awe now I wanna see what was said originally haha.

Well, I happened to have this recorded. I hope Perifractic wouldn't mind me reposting this:

21 hours ago, Perifractic said:

David has finished the port and here it is rubbing on the X16 prototype!

 

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2 hours ago, OguzhanKuyubasi said:

Will be there an Option to select the PSG, FM or both?

PSG, PCM, and FM can all be used at once.

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1 hour ago, StinkerB06 said:

PSG, PCM, and FM can all be used at once.

What i know that the FM Sound comes from the YM2151 and the PSG and PCM from the VERA Chip but we all know it.

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On 2/6/2021 at 8:08 PM, OguzhanKuyubasi said:

What i know that the FM Sound comes from the YM2151 and the PSG and PCM from the VERA Chip but we all know it.

Don't forget that there is the YM3012 DAC as well.

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On 1/31/2021 at 6:25 PM, The 8-Bit Guy said:
I spent some time the last few days converting Petscii Robots over to the X16. It's now more or less fully functional. Well, you can play the game from beginning to end, anyway.. But it still lacks sound, and it is using the default font, which I hope to change soon to the PET font, which will make it look nicer. It also lacks a lot of effects like screen-shake, EMP flash, etc. I'll be working to add those in over the next few days. Also, since the game is designed for 40x25 screen, there is some black area at the bottom.
That being said, once I get this version completed, I'll slowly begin the transition to a custom graphic version for the X16 as originally promised, which should fill the whole screen.

image.png.e23fe29af2a4428c37e45906672a3b5b.pngimage.png.aa177637562e6bcce2178f237450520c.png

A little question.

Will you use 16 Colors or 256 Colors for Attack of the PETSCII Robots?

For me it looks like 16 Colors.

Edited by OguzhanKuyubasi

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I'm not sure why, but this is just so awesome to me! Seeing a new "retro" game playing on a new "modern retro" computer, on the actual hardware prototype....

Fantastic!

This brings back that old sense of joy I used to get back in the 80's/90's when a new game or hardware was just on the horizon.

Thank you!

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34 minutes ago, OguzhanKuyubasi said:

For me it looks like 16 Colors.

Actually, it looks like @The 8-Bit Guy is using black as a consistent background color for all the characters, so this could very easily be done in 256 color mode.

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9 hours ago, xanthrou said:

Don't forget that there is the YM3012 DAC as well.

I thought the YM3012 was just used to convert the digital audio bitstreams from the YM2151 into analog audio outputs. Like, the CPU wouldn't be able to address it.

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1 hour ago, StinkerB06 said:

I thought the YM3012 was just used to convert the digital audio bitstreams from the YM2151 into analog audio outputs. Like, the CPU wouldn't be able to address it.

That's correct. The VERA has its own DAC to output sound from the PSG and PCM.

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17 minutes ago, SlithyMatt said:

That's correct. The VERA has its own DAC to output sound from the PSG and PCM.

I have a question can the VERA playing PCM also for Music or only for Sound Effects?

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39 minutes ago, OguzhanKuyubasi said:

I have a question can the VERA playing PCM also for Music or only for Sound Effects?

Using the PCM (by itself) for music would be a bad idea. It requires way too much memory to hold uncompressed audio samples, and the 65C02 is not powerful enough to decode MP3 or anything in real time. The PSG or the YM2151 are FAR more efficient options for music. What you can use the PCM for are non-pitched instrument samples, like drum hits, which only take up a few kilobytes, and you can synch those up with a PSG or YM2151 track.

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14 minutes ago, SlithyMatt said:

Using the PCM (by itself) for music would be a bad idea. It requires way too much memory to hold uncompressed audio samples, and the 65C02 is not powerful enough to decode MP3 or anything in real time. The PSG or the YM2151 are FAR more efficient options for music. What you can use the PCM for are non-pitched instrument samples, like drum hits, which only take up a few kilobytes, and you can synch those up with a PSG or YM2151 track.

Combining the YM2151 and the PCM from the VERA you got good music like the Arcades and the Sharp X68000.

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8 hours ago, OguzhanKuyubasi said:

Combining the YM2151 and the PCM from the VERA you got good music like the Arcades and the Sharp X68000.

And add the PSG as well.

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