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Thread: A314 co-processor cards

  1. #1
    Inactive Member Robban's Avatar
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    Default A314 co-processor cards

    15/6
    As you may have noticed by the lack of updates recently I do not really have the spare time to solder these cards right now. So I'll stop taking preorders now but honour the ones that are in line already. Timeframe for coming cards are roughly from when I get my shipment of FPGAs from Digi-Key, now estimated to be sent 16.7.2020.
    Users Alainneke and MoRetros cards seems to have dissapeared in transit, and I have demanded that the local post office investigate further.

    Update 5/5
    It seems that none of the shipments from the last batch shows any progress other than "Left Finland" as of yet. I tried contacting the postal services here but they didn't offer much help. I thought that by using "recommended" and tracked shipping I would not have to deal with that stress.
    I'm very sorry for the delays and hope the boards reach you soon!

    8/4
    Hello again! I have now soldered up as many board as I could. Unfortunately i only got a yield of 8 boards, as I have two that refuses to work as they should and no spare parts to try and switch out.
    I'll send out PM. to the first 8 in the list.
    I have already ordered parts for a new batch, but it seems that the FPGA that A314 uses is on backorder and only estimated to be back in stock June 11... I will try to find another supplier but the ones i have tried so far tell the same story. So it might be a while until the next batch, I'm sorry for this

    --------
    Hello!

    I have assembled 4 A314 co-processor cards for Amiga 500(+). These will let you connect an Raspberry Pi to the Amiga via the trapdoor expansion slot and use it as a co-processor. Please see https://github.com/niklasekstrom/a314 and the official EAB thread http://eab.abime.net/showthread.php?t=97171 for information.
    Please note that they are hand soldered by me, so there might be small imperfections here and there. But I have tested them all using Diagrom to check every block of memory, then using all available modules from the github repo to see that everything works.
    These include:
    -"picmd" to open a RPI bash shell directly from the Workbench CLI
    -"piaudio" together with mpg123 to play an mp3-file on the raspberry and stream the audio directly to the Amiga soundchip
    -"pidisk" gives the ability to mount a shared folder on the RPI directly in workbench, making data transfer to the Amiga easy
    -"remotewb" captures the video data directly from Denise and duplicates it to a socket in the RPI. This can then be displayed using a web server on the RPI. Mouse/keyboard input is also captured and forwarded from the browsers window to the Amiga, making this functionally a complete VNC solution for Workbench using almost no resources of the 68k.
    -"videoplayer" does the opposite and streams video from the RPI to a framebuffer on the Amiga. It is mostly a proof of concept, but works quite well technically

    Also note that any module that relies on writing and reading data to the Amiga chipset (piaudio, remotewb and videoplayer) will require the trapdoor memory to be identified as chipram, so a chipram mod might be advised on regular 500 (the 500+ is setup from factory to use the trapdoor as chipram). Picmd and Pidisk still works properly if the trapdoor is treated as slow-ram.
    The card contains an RTC and 1MB of memory that can be used as normal trapdoor memory. Some Linux knowledge is advised for setting up the RPI, though most things are written up in the github repo's wiki. I can provide some support as well if you need it, either here or on the EfNet IRC-channel #A314.

    These are PCB ver 1.1, so you can change compatibility with Amiga 500 <-> 500+ using the jumper JMP3. If closed it works in 500+, if open it works in regular 500.

    Any questions just ask

    I'm looking to sell them all separately for 120€ + postage a piece. Postage should be 15€ worldwide for registered air-mail. Payment via PayPal is preferred
    Click image for larger version. 

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    Edit:
    queue for the 4 cards:
    -Puppetmaster - Payment received, item sent
    -gebes - Payment received, Item sent
    -arnjot - Payment received, Item sent
    -deetsay - payment received, Item sent

    Queue for the next batch
    -PRS -Payment received, item sent
    -0001agima -Payment received, item sent
    -gdunlapsd -Payment received, item sent
    -michaeljk -Payment received, item sent
    -B_G_L -Payment received, item sent
    -Magic -Payment received, item sent

    Coming batch:
    -Sim085 -PM sent, payment received, postal office could not send items to Malta right now, still waiting on this as 15/6
    -Alainneke -PM sent, payment received, item sent, seems item was lost in transit to Belgium
    -MoRetro-PM sent, payment received, item sent, seems item was lost in transit to Belgium,
    -Nowee -PM sent, payment received, item sent
    -PorkLip -PM sent, payment received, item sent
    -Mattup -PM sent, payment received, item sent
    -Trixster -PM sent, payment received, item sent
    -Lizard -PM sent, payment received, item sent
    -Logik -PM sent
    -Rakeim132 - If i do a red one, there is actually a chance
    -Fastdruid
    -eStorm
    -Ruenhart
    -Simonfromsomewhere
    -JohnnySlick
    -Electroblaster
    -Chiark
    -AngryInca
    -StrongArm

    -Keiko -PM sent, prefers to wait until I maybe produce some 1.2 boards in the future
    -Mkopack73 -PM sent, mail sent, no answer, will put back in line when i get one
    -BuzzBrain -PM sent, mail sent, no answer, will put back in line when i get one
    Last edited by Robban; 15th June 2020 at 11:10. Reason: Update queue

  2. #2
    Puppetmaster's Avatar
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    Interested in one. Send PM later

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    gebes's Avatar
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    Interested, will send PM. Will any Raspberry Pi work, or is there a preferred one to use ?

  4. #4
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    Interested, will PM
    Been away for a long time, time for comeback?

  5. #5
    Inactive Member Robban's Avatar
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    Quote Originally Posted by gebes View Post
    Interested, will send PM. Will any Raspberry Pi work, or is there a preferred one to use ?
    I have only tried RPI2B and RPI3B(+), but there should not be any problems using any version of the pi except the "A" versions. They might not physically fit without removing the bottom EMI-shield of the Amiga.

    Click image for larger version. 

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    The very first model Pi 1 has a different pinout for the GPIO also, so care must be taken to match the pins on the board. The only ones used are 5V power, ground, and the SPI pins.

    Do note that the RPI4 has a significantly higher power draw than previous models also. This might put extra strain on your PSU.
    I have tested the cards with a RPI3B and a TF534 accelerator on an A500+ with a stock lightweight 4.5A@5V power supply and that works no problems. The same setup causes some noise in the video signal with a stock lightweight 2.5A PSU. If it is a concern, then maybe a Raspberry Pi Zero (W) is the best choice, since they have much lower power reqirements.

    I'd say that the RPI3B is the sweet spot, decent power requirements, quite fast (for interacting with the Amiga even the rpi1 is plenty fast enough), and has built in WiFi. The internet part is quite a big plus, since you can do stuff like SSH from your Amiga, wget things directly from aminet to the shared folder from workbench, or share the pidisk-folder via samba, giving you the ability to just drag and drop files from Windows to the Amiga. All while still running a stock 68000 on WB 1.3 if you so wish
    Last edited by Robban; 16th January 2020 at 07:01. Reason: Add picture showing EMI-shield clearance

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    deetsay's Avatar
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    I declare interest in one!
    tero

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    Interested in one
    Amiga 500 Rev.3 (stock) and CDTV (2MB chip, 8MB fast, SCSI, kickstartswitch)
    Amiga 500 Plus (2MB chip, A314 RPi, GVP A530 68030, GVP AT286, 8MB, A500Flash)
    Amiga 1200d Rev. 1d4 (BPPC 66/333Mhz, BVision, HxC floppy, PicoPSU, RapidRoad)
    Amiga 4000d (Cyberstorm mk III 68060@50Mhz, Picasso IV, RapidRoad)

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    Thanks for the detailed response, I've got a modern meanwell PSU I'd use rather than a stock one. I have pm'd you
    Last edited by gebes; 16th January 2020 at 10:26. Reason: Updated with detail

  9. #9
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    Payment sent by PayPal friends payment.
    Been away for a long time, time for comeback?

  10. #10
    deetsay's Avatar
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    Payment made!
    tero

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