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Offline blanningTopic starter

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A project I'd like to see from Jens...
« on: June 21, 2014, 01:13:54 AM »
... or from someone else I guess...

I think it would be really cool to create a bridgeboard that plugs into the raspberry PI, or maybe plug it into the CPU slot or 500 expansion slot.

The PI has ethernet, usb, an SD card slot, memory, HDMI and composite video output, audio, and a lot of memory...  It would be great to give the amiga access to all that.

Maybe the video could even be used to emulate an amiga RTG board.

It could plug into the amiga board through the gpio port and pass it through so other things can be plugged in.

You could probably even hang a low profile PCI slot off the board.

Maybe even emulate a powerpc chip.

wishful thinking...

brian
 

Offline gertsy

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Re: A project I'd like to see from Jens...
« Reply #1 on: June 21, 2014, 02:14:21 AM »
Quote from: blanning;767228
... or from someone else I guess...

I think it would be really cool to create a bridgeboard that plugs into the raspberry PI, or maybe plug it into the CPU slot or 500 expansion slot.

The PI has ethernet, usb, an SD card slot, memory, HDMI and composite video output, audio, and a lot of memory...  It would be great to give the amiga access to all that.

Maybe the video could even be used to emulate an amiga RTG board.

It could plug into the amiga board through the gpio port and pass it through so other things can be plugged in.

You could probably even hang a low profile PCI slot off the board.

Maybe even emulate a powerpc chip.

wishful thinking...

brian


I think Jens should produce something that every Amiga lover buys and actually make a good profit for his efforts, support and loyalty.  I wish I knew what that product was, If I did I would tell him.  I don't think he should make anything people would "like" to see because that's just not financially viable. Not that I don't think the product you've outlined isn't a good idea.  I think most of it has good merit.
 

Offline blanningTopic starter

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Re: A project I'd like to see from Jens...
« Reply #2 on: June 21, 2014, 02:30:49 AM »
Quote from: gertsy;767231
I think Jens should produce something that every Amiga lover buys and actually make a good profit for his efforts, support and loyalty.  I wish I knew what that product was, If I did I would tell him.  I don't think he should make anything people would "like" to see because that's just not financially viable. Not that I don't think the product you've outlined isn't a good idea.  I think most of it has good merit.


I realize if it's not cost-effective, it will never happen.  I'm just wishing out loud.
 

Offline freqmax

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Re: A project I'd like to see from Jens...
« Reply #3 on: June 21, 2014, 03:43:07 AM »
You could perhaps do it quick & dirty. The Raspberry-Pi runs att 700 MHz. The Amiga 500 (bus) runs at 7,14 MHz. So 98 cycles available to catch I/O signals. Connect enough Raspberry-Pi GPIO to the Zorro bus or parallell port. Then activate interrupt-on-change on the ARM CPU. Capture the bits and use them.

And the ARM CPU has some really good but complicated DMA engines. It's even possible to chain RAM --> DMA --> VGA video etc.

A quick feasability study is to measure the response time of the RPi. Let it watch one I/O using interrupt-on-change and the interrupt routine will then toggle another I/O. Wire to an oscilloscope and catch the result which you can dump here..
 

Offline Matt_H

Re: A project I'd like to see from Jens...
« Reply #4 on: June 21, 2014, 05:27:32 AM »
Getting the hardware side of this working would be a big challenge, but don't forget that the software component could be even harder. Just like with the Bridgeboards, the Amiga and Pi sides would need to find a way to talk to each other and any Amiga drivers for the Pi's hardware would probably need to go through that software interface...
 

Offline ElPolloDiabl

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Re: A project I'd like to see from Jens...
« Reply #5 on: June 21, 2014, 09:25:24 AM »
Could this be done by linking a PC emulator or pi emulator to the 68k Amiga. You could access the disks on the Amiga. What about the other resources.

I'll try and find out what is involved.
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Offline ElPolloDiabl

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Re: A project I'd like to see from Jens...
« Reply #6 on: June 21, 2014, 10:18:52 AM »
The easiest way to do it would be: remote desktop connection. I don't know which software you would use for that.
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Offline wawrzon

Re: A project I'd like to see from Jens...
« Reply #7 on: June 21, 2014, 10:58:51 PM »
Quote from: gertsy;767231
I think Jens should produce something that every Amiga lover buys

simple: universal turboboard for every amiga multiple times faster than any existing accelerator and that for affordable money. am i right or am i right?
 

Offline matthey

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Re: A project I'd like to see from Jens...
« Reply #8 on: June 22, 2014, 12:14:02 AM »
Quote from: wawrzon;767288
simple: universal turboboard for every amiga multiple times faster than any existing accelerator and that for affordable money. am i right or am i right?


I thought that was already planned with Majsta's next accelerator for the 500/2000/1000 and using the Apollo core ;).
 

Offline freqmax

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Re: A project I'd like to see from Jens...
« Reply #9 on: June 22, 2014, 12:41:30 AM »
New production run of 6581 and 68060 .. ;)
 

Offline RedskullDC

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Re: A project I'd like to see from Jens...
« Reply #10 on: June 22, 2014, 02:03:08 AM »
Hi freqmax, et al.
Quote from: freqmax;767298
New production run of 6581 ... ;)


You could theoretically already make "replacement" 6581's.

VHDL code for 6581 equivalent is available here:
http://code.google.com/p/netsid-papilio/source/browse/trunk/doc/original_sid_src/sid_6581.vhd?r=2

Use a GODIL module:
http://www.trenz-electronic.de/products/fpga-boards/oho-elektronik.html
(250 model should easily suffice).

They're a great little product for replacing obsolete/impossible to find DIP parts.
I've used them a couple of times for repairing late 70's pinball machine boards.

Not a trivial solution, I grant you, but do-able. :)

Cheers,
Red
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Offline matthey

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Re: A project I'd like to see from Jens...
« Reply #11 on: June 22, 2014, 03:13:02 AM »
Quote from: RedskullDC;767305

You could theoretically already make "replacement" 6581's.

VHDL code for 6581 equivalent is available here:
http://code.google.com/p/netsid-papilio/source/browse/trunk/doc/original_sid_src/sid_6581.vhd?r=2


But would the all digital fpga sound the same? It may sound too clean where many SID enthusiasts prefer distortion. Even the different versions of the real SID chips sounded different. The VHDL for a 6581 is small enough that it has been considered for adding to at least one Amiga fpga board. The SID has some unique abilities that Paula can't do. It would make an interesting combination for sound as well as making C64 emulation easier.
 

Offline freqmax

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Re: A project I'd like to see from Jens...
« Reply #12 on: June 22, 2014, 07:04:44 AM »
Exactly, all digital 6581 replication solutions won't cut it. They just don't have the same sound.
 

Offline amigadave

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Re: A project I'd like to see from Jens...
« Reply #13 on: June 22, 2014, 07:49:38 AM »
Quote from: RedskullDC;767305
Hi freqmax, et al.


You could theoretically already make "replacement" 6581's.

VHDL code for 6581 equivalent is available here:
http://code.google.com/p/netsid-papilio/source/browse/trunk/doc/original_sid_src/sid_6581.vhd?r=2

Use a GODIL module:
http://www.trenz-electronic.de/products/fpga-boards/oho-elektronik.html
(250 model should easily suffice).

They're a great little product for replacing obsolete/impossible to find DIP parts.
I've used them a couple of times for repairing late 70's pinball machine boards.

Not a trivial solution, I grant you, but do-able. :)

Cheers,
Red

Repairing or restoring old Pinball machines, now that sounds like a fun hobby that could make a person some good spare cash. :)
How are you helping the Amiga community? :)
 

Offline Dr.Bongo

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Re: A project I'd like to see from Jens...
« Reply #14 on: June 22, 2014, 08:22:23 AM »
38911 BASIC BYTES FREE, less when I`ve had a drink!

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