Raven. A homemade Atari-like computer

[exxos]

:bravo: :2k2:

[dml]

That's amazing progress. You built that thing so fast! I wanted to reply sooner but being a dolt, forgot my login password :)

A bit jealous you have that fancy new DSP to play with but if I can find the bits I might try to build an A2 at some point. (I did run out of 68060s with the first build though)

[redpixel]

You are the GOAT @agranlund :P Really amazing that you've managed to pull this off repeatedly, getting to a working board with basically no re-work needed. Both design and soldering!

A bit jealous you have that fancy new DSP to play with but if I can find the bits I might try to build an A2 at some point. (I did run out of 68060s with the first build though)

There is a guy (screemo) on Amibay selling 68060's for 279€ a pop. I think it's a really fair price. I bought the one for my Raven from him and it's worked perfectly. I really have no idea where he got all of them from as it seems he's sold probably 100+ by now and still has more to spare :o

[agranlund]

Thanks @redpixel !
I don't know intricate details and best practices of EE so to be fair I'm constantly surprised by things actually working :)

[agranlund]

Internal speaker works and can be controlled the same way as on Falcon.

IMG_6083.jpg

IMG_6082.jpg

Digital pot for adjusting the volume coming out of the YM also works.
Practically, this volume control will be exposed through rvsnd.

I recon next up might be writing a DSP program to verify that the DAC and ADC connected to it are working as expected.
And at some point start implement the Falcon dsp xbios.

Some other stuff still waiting to be tested:
fan PWM
fan RGB
dsp: external sram
dsp: essi0 (DAC and ADC)
dsp: essi1 (general purpose header)
i2c: eprom with mac address

[Oldskool]

Very cool!!!! Always nice to read your updates....

[agranlund]

DSP -> DAC -> Line and Speaker output verified ok.
Gave me quite the jumpscare when the sawtooth buzzer test code started working :)

[ctirad]

Hi, I don't know if this has already been said here, but what about adding a CT60 compatible expansion header to some further revision?

[Mikerochip]

DSP -> DAC -> Line and Speaker output verified ok.
Gave me quite the jumpscare when the sawtooth buzzer test code started working :)

:D

Unrelated, but, since I haven't looked at my BGA ram, and routing it in a bit, I decided I'd just buy the SRAM.
I have a case! The nifty Fractal Design Pop Silent Mini (I wanted one with a window, but, I can't find it for sale anywhere), with it's two hidden 5.25" bays, and hopefully, a 68LC060 on the way.

...

6x of those SRAM ICs are now €400 :O (inc. vat) HOLY PRICE INCREASE BATMAN.

Tomorrow, I'll take (another) serious look at routing that bga PSRAM. I mean. It'd be madness not to.

[danboid]

Congrats on getting the A2 running Anders!

Over the weekend, via the EmuTOS mailing list I learned of another very cool open source M68K machine, Y Ddraig (Welsh for The Dragon).

Its not as powerful as the Raven but I think it would be cool to see some sort or co-operation between the two platforms if and where possible. 68060's are not cheap so that alone might price the Raven out for some. The Dragon should be a bit more affordable.

Sorry if this has already been mentioned here.

https://ddraig68k.com/