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ksdesigns

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Joined: 25/06/2011
Location: United States
Posts: 143

Posted: 04:38am 25 Sep 2011

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uses original roms still need to rotate screen and add sound
but plays ok so far and all animation works

ken

jman

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Joined: 12/06/2011
Location: New Zealand
Posts: 711

Posted: 04:49am 25 Sep 2011

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Thats fantastic

Care to share

Regards
John

Nick

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Joined: 09/06/2011
Location: Australia
Posts: 512

Posted: 06:49am 25 Sep 2011

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Fantastic work Ken!! Now THATS how you do Space Invaders for the PIC32.

You're amazing! First you make the Maximite into a TRS-80, then a real Space Invaders machine.

Once you perfect the Space Invaders emulation, it wouldn't be too hard to get Lunar Rescue working (2 for the price of one!). That one used the Space Invaders arcade board, just mainly a new ROM.

...but don't forget the TRS-80! :)

I don't run MMBASIC anymore. My Maximite is a TRS-80!

"You da man!"

NickEdited by Nick 2011-09-26

mookster1
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Joined: 10/06/2011
Location: New Zealand
Posts: 81

Posted: 09:12pm 27 Sep 2011

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Now THAT is awesome. +1

Capacitance is futile - roll on 2012!

ksdesigns

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Joined: 25/06/2011
Location: United States
Posts: 143

Posted: 10:21pm 27 Sep 2011

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Still have not rotated the screen yet but has sound and is fully playable
just need to get it rotated.
not real happy with the sound playing wav files thru pwm .
so i figured i would make a board with a dac on it to play wav files
did a rough design and added 4 12bit I2C DAC's and 2 Wii Controller ports
has 26 pin edge connector to plug in to the maximite so you don't need a cable
will try and build one this week
ken

Nick

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Joined: 09/06/2011
Location: Australia
Posts: 512

Posted: 02:52am 28 Sep 2011

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Seems like a lot of work just to get monochrome arcade Space Invaders to work on the Maximite but I guess that the board would be good for other games ported later.

Also gives the Maximite a better DAC sound output for sampled sound effects.

Wonder if it's possible to add some control to enable color similar to my idea of channeling the VGA output to selectable RGB pins? (since this board plugs in to the I/O connector).

Don't forget the TRS-80 emulator. :)

I envy your skills.

Nick

ksdesigns

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Joined: 25/06/2011
Location: United States
Posts: 143

Posted: 03:29am 28 Sep 2011

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It uses a microchip MCP4725 DAC
� Fast Settling Time of 6 μs (typical)
� External Voltage Reference (VDD)
� Rail-to-Rail Output
� Low Power Consumption
� Single-Supply Operation: 2.7V to 5.5V
� I2CTM Interface:
- Eight Available Addresses
- Standard (100 kbps), Fast (400 kbps), and
High-Speed (3.4 Mbps) Modes
� Small 6-lead SOT-23 Package
� Extended Temperature Range: -

so its good for a lot more than audio
that's why i added 4 of them :)
and for the Wii controller you can use the classic one for games

or the numcuck one you get a joystick and a
STMicroelectronics LIS3L02AL 3-Axis MEMS Inertia Sensor

ken

Nick

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Joined: 09/06/2011
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Posts: 512

Posted: 05:14am 28 Sep 2011

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Cool. What about doing something to add color?

Send the VGA output signals to that board then have a way to switch the VGA signal to selectable RGB pins. Control the routing with your emulator to change the color at a scanline level.

I see this as a plug in 'game board' enhancement.

I wonder if it's possible to write an emulator bootloader in firmware that loads an emulator from SD into RAM? This could allow selectable games/emulators without the need for firmware loading each.

Makes it more multi-purpose.

mookster1
Regular Member

Joined: 10/06/2011
Location: New Zealand
Posts: 81

Posted: 08:23pm 28 Sep 2011

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Would you be able to post a circuit diagram of the sound/game controller module? I was going to design one so I could use the Maximite as a sound synthesiser. As for colour graphics there's a module (the PICASO) that you can get from Sparkfun that lets you send it serial data and draw stuff on the screen. Here's the link: http://www.sparkfun.com/products/10329. It's about US$59.95, though, so it's a bit of a pricey solution.

Capacitance is futile - roll on 2012!

ksdesigns

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Joined: 25/06/2011
Location: United States
Posts: 143

Posted: 09:51pm 28 Sep 2011

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i will post on when i get it done this week
if you want a easy way sparkfun sells a breakout board for the dac
Sparkfun MCP4725
for about 5$
ken

ksdesigns

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Joined: 25/06/2011
Location: United States
Posts: 143

Posted: 05:10am 30 Sep 2011

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Put up a short video here Pic32 Space Invaders Probably my worst game play ever

Added a resistor DAC for the audio sounds much much better than the pwm audio
will post a Maximite version in the next few days
ken

jman

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Joined: 12/06/2011
Location: New Zealand
Posts: 711

Posted: 05:21am 30 Sep 2011

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Hi Ken

Well done it looks really cool
Cant wait to test it

John

Nick

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Joined: 09/06/2011
Location: Australia
Posts: 512

Posted: 06:14am 30 Sep 2011

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Yep! That's Space Invaders alright.

The only problem I see is...

How many people are going to blow their firmware each time just to play one game?

They'll do it once to see it initially but then it will be back to MMBASIC.

What's needed is a way to load and execute this emulator from MMBASIC.

Nick

VK6MRG

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Joined: 08/06/2011
Location: Australia
Posts: 347

Posted: 09:56am 23 Oct 2011

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I would be quite happy to have a maximite setup permanently for a Space invaders game! But that's because I have 4 Maximites now! So I have one to spere!

Its easier to ask forgiveness than to seek permission!

............VK6MRG.............VK3MGR............

VK6MRG

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Joined: 08/06/2011
Location: Australia
Posts: 347

Posted: 05:13pm 25 Oct 2011

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Any new on the space invaders yet?
I'm keen as to try it out!

Its easier to ask forgiveness than to seek permission!

............VK6MRG.............VK3MGR............

ksdesigns

Senior Member

Joined: 25/06/2011
Location: United States
Posts: 143

Posted: 05:58pm 25 Oct 2011

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Sure i will try and Build a Maximite version tonight for you ..
ken

elproducts

Senior Member

Joined: 19/06/2011
Location: United States
Posts: 282

Posted: 03:02pm 26 Oct 2011

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ksdesigns said Sure i will try and Build a Maximite version tonight for you ..
ken

Ken,
Is that Space Invaders code posted anywhere we can download?

www.elproducts.com

robur25
Newbie

Joined: 23/12/2011
Location: United Kingdom
Posts: 1

Posted: 10:19am 23 Dec 2011

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Howdy - looking for the DuinoMite download too..... something to inspire my son this holiday - fingers crossed.

Any news Ken?

snowwy
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Joined: 17/12/2011
Location: United Kingdom
Posts: 6

Posted: 12:18pm 23 Dec 2011

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Fantastic! Would it be available on the Duinomite-mega? Also, is there anywhere I could download the trs-80 emulator? Would it work unmdified on the Mega?

Thanks :)

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