VOGONS


Reply 80 of 190, by Dominus

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Wow, great!

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Reply 82 of 190, by gdjacobs

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PhilsComputerLab wrote:

That's excellent, thank you!

No problem. Let me know how you fair with it!

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Reply 84 of 190, by gdjacobs

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Might as well get a Pi 3 at this point. The Pi 2 hasn't had a price cut yet. If history is an indication, it'll be a few months before that happens.

Either way, I think the image should be fine on a Cortex A53. Using the A7 code generator and targeting VFP4 and NEON should work, although I obviously haven't tested it yet.

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Reply 85 of 190, by gdjacobs

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Got a working GPIO driven LCD for SYSEX messages.
www.vogons.org/viewtopic.php?f=29&t=468 ... 78#p483478

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Reply 87 of 190, by gdjacobs

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Thanks. Next step is an intelligent mode MPU401. Difficult to do on my discretionary budget. Prices these days are enough to stand my hair on end. With either the MPU-401AT or MPU-IPC-T + BOB combos running in excess of $300 online, HardMPU looks like what I'll be looking at by default.

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Reply 88 of 190, by stamasd

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...or one of keropi's MusicQuest clones, if he gets around to making more of them (I grabbed one when they were hot 🤣).

I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O

Reply 90 of 190, by keropi

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stamasd wrote:

...or one of keropi's MusicQuest clones, if he gets around to making more of them (I grabbed one when they were hot 🤣).

I'll just leave these '80s mcus here 🤣 🤣 🤣 🤣

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cT89QGt.gif Amstrad PC7486SLC-33 wanted , click me for AmiBay ad!

Reply 91 of 190, by stamasd

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keropi wrote:
stamasd wrote:

...or one of keropi's MusicQuest clones, if he gets around to making more of them (I grabbed one when they were hot 🤣).

I'll just leave these '80s mcus here 🤣 🤣 🤣 🤣

You were wondering if there's a market for these. Well there you go.
With your modern clones (or HardMPU), and an external MT32 emulator box using modern hardware we can bypass the vintage used market altogether.

(edit) Hmm now I wonder if I can interface a RPi zero to the ISA bus and make it run SoftMPU... Yes I know it uses 3.3V logic, but that's not something that can't be overcome with some level translators (such as www.ti.com/product/sn74alvc164245 ).

I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O

Reply 92 of 190, by keenerb

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Fascinating project. I personally tried using an old windows laptop as an external midi device a few years back when I had massive issues with mt32emu (or was it timidity?) in linux. Building a little MT-32 clone with a raspberry pi sounds like precisely what I had hoped to achieve back then!

Reply 93 of 190, by PhilsComputerLab

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This project has moved away a little from my original idea of using an old notebook 🤣

I'm wondering if anyone is willing and able to work on a Windows front-end of some sort? Basically a program that easily configures everything and let's you switch between Munt and VirtualMidiSynth.

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Reply 95 of 190, by gdjacobs

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keropi wrote:

I think it moved to the best direction since a pi is so small and full of wonder 😁

They've got a marketing issue. Big pies are better than small pies, but small pis are better than big pis. Maybe they should rename them a Raspberry Tart?

In that case, small is fine because: [1] you can always eat more and [2] having them bite sized is so convenient!

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Reply 96 of 190, by PhilsComputerLab

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keropi wrote:

I think it moved to the best direction since a pi is so small and full of wonder 😁

The thing that got me to use a notebook for this project is that I have, over the years, accumulated quite a few notebooks that are just lying around doing nothing.

I like when old devices get a purpose again. Sure the Pi is cheap and all of that, but it's another device that people buy and the cycle continues.

I'm wondering if the Windows version can also be optimized so it runs on netbooks or other slow notebooks.

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Reply 97 of 190, by Dominus

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My feeling is that a Windows version just has way too much overhead (Windows itself) to be very useful.
A pi is great for that, because it is mostly "plug and play" once you have it setup. Imagine how long you have to wait for a Windows to boot up just for that compared to a pi 😀

Windows 3.1x guide for DOSBox
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DOSBox SVN snapshot for OS X (10.4-10.14 ppc/intel 32/64bit) codesigned for gatekeeper
DOSBox SVN with SDL2 snapshot for OS X (10.7-10.14 intel 64bit) codesigned for gatekeeper

Reply 98 of 190, by gdjacobs

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I know using a netbook on the Linux side, it was a similar problem of forcing the compiler to generate code for the SSE registers. This might be required on the Windows side (and could certainly be done), but I haven't tested it.

FWIW, on my Atom N270 based netbook using the following parameters achieved the performance I desired with Munt.

CCFLAGS="-Ofast -march=pentium -msse3 -mmmx -mssse3 -msse2 -mfpmath=sse"
CXXFLAGS="-Ofast -march=pentium -msse3 -mmmx -mssse3 -msse2 -mfpmath=sse"

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Reply 99 of 190, by stamasd

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I keep thinking about it. I wonder if a RPi has enough oomph to emulate both the MPU-401 (HardMPU-like) and the MT32 on the same board. That would go a long way toward simplifying the hardware needed.

Or if not the RPi then maybe one of the Allwinner boards we were talking about in the other thread.

I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O