Before installing the board into your Amiga, you will need to program the CPLD chip.
The firmware is the same as the original project by lvd. It has been copied here for convenience, but it is unmodified.
The firmware was originally developed for Altera EPM7032SLC44 CPLDs.
Atmel/Microchip makes compatible devices under the ATF1502 series, so the ATF1502AS-10JC44 can be used as an alternative, which is easier to find nowadays (-10JU44 is fine as well).
You will need to load the .POF file in quartus_pgm and flash it using one of the cheap USB Blaster programmer clones you can find everywhere.
NOTE: One user recommends NOT to use the auto-detect button as it will add two ICs to the window. Just select the USB Blaster hardware and load the .POF file (make sure to check only Program/Configure + Verify!). Then hit the Start button to flash.
You can program the .JED file using the ATDH1150USB programmer.
These days you will only find the ATF1502AS-10JC44 (or -10JU44) on the market, but, if you read the above, you will know that you will need to buy a >50€ programmer to program it, which doesn't sound reasonable, as this will most likely only need to be done once. Besides, all the tools mentioned above are Windows-only so if you are a Linux user like me, you're pretty screwed. Luckily, there is a solution that allows flashing the Atmel chip with the cheap USB Blaster clones. I have developed and tested it under Linux, but it should also work on Windows and OS X.
First of all you need to power the board. JTAG programmers are not supposed to provide power, hence you need to do so separately. The board does not have a dedicated power connector, but you can use the pads of C1 (which I don't recommend installing, unless you have stability issues) or pins 2 (GND) and 4 (VCC) of the IDC connector. The board needs 5V, I usually take those from an Arduino board but feel free to use whatever suits you.
On the software side, you will need UrJTAG. I have only tested version 2018.09, others might work or not. I am not sure this version is readily available in binary format, so you might have to compile it from sources.
You will also need to get the BSDL (Boundary Scan Description Language) files for the 1502 CPLDs. Download the zip file, uncompress it anywhere you like and take note of the path, you will need it later.
Finally, you will need the firmware in SVF format, available in this folder. Use either 4mb.svf or 8mb.svf according to how you assembled your board.
Now you are ready for the actual flashing, so connect your USB Blaster to the IDC connector on the board and plug it into an USB port on your PC. Then run urjtag as follows:
sukko@shockwave firmware $ sudo jtag
UrJTAG 2018.09 #
Copyright (C) 2002, 2003 ETC s.r.o.
Copyright (C) 2007, 2008, 2009 Kolja Waschk and the respective authors
UrJTAG is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
There is absolutely no warranty for UrJTAG.
warning: UrJTAG may damage your hardware!
Type "quit" to exit, "help" for help.
jtag> cable UsbBlaster
Connected to libftdi driver.
This means that your USB Blaster was detected correctly. Let's load the BSDL files, this is where you will need to use the path you took note of at the beginning:
jtag> bsdl path <path>
jtag>
Now we can scan the JTAG chain:
jtag> detect
IR length: 10
Chain length: 1
Device Id: 00000001010100000010000000111111 (0x0150203F)
Filename: bsdl/1502AS_A44.bsd
This means that the CPLD was found and it is ready to be programmed. If you get no output at this step, try disconnecting and reconnecting the USB Blaster or power to the board. If the chip gets detected but it is reported as unsupported, check that you downloaded the correct BSDL files. Then start the flashing:
jtag> svf 8mb.svf progress stop
warning: unimplemented mode 'ABSENT' for TRST
detail: Parsing 3660/3668 ( 99%)detail:
detail: Scanned device output matched expected TDO values.
If you get the above output, the flashing was successful and you can start using your board. If instead you get something like:
jtag> svf 8mb.svf
warning: unimplemented mode 'ABSENT' for TRST
Error svf: mismatch at position 64 for TDO
in input file between line 2196 col 1 and line 2198 col 32
Then there was an error during the flashing, check your wiring, power and try again.
You are recommended to get a full-size Altera USB Blaster clone, i.e. one of these:
Note the Rev.C: I'm not sure if it is crucial, but the one I have says so and is working very well.
Do NOT buy this:
It does not work correctly, as it always hangs between 47% and 49% of the flashing process.
As an alternative, if you have an old computer with LPT1 and some version of Windows, you can build the cable mentioned here and use it with Microchip's ATMISP tool.
I have managed to build a Windows binary of UrJTAG with only the minimum options needed to program these CPLDs through a USB Blaster. It was tested by a couple of users and seemed to be working fine. A user even automated the procedure, so now you can just download the UrJTAG.zip file from the windows folder, unzip it and double click on the runme.bat script (with the programmer and board already connected to your PC): this should guide you through the whole flashing process.
I hope this works for you, but please note that it is unsupported, as I have no computers running Windows.
The firmware was developed with Quartus 7.2, somewhat totally old and outdated, but I never got any problems with it. I DO NOT recommend using Quartus 6.x as I caught it generating wrong designs (in a way, nothing is working and when you swap to Quartus 7.2 not touching you project, everything is working back).
If you want to move to something newer, it seems that Quartus 10.x and 11.x are still supporting EPM7000S chips. Starting from Quartus 12.x there's no more support for that devices.
Quartus will produce a .POF file. This can be converted to a .JED file for Atmel devices through Microchip's POF2JED utility, which is Windows-only unfortunately.
An SVF file can be produced using ATMISP, which is also Windows-only.
The chips can be pre-used if you bought your ATF1502AS from China. Sometimes JTAG interface is disabled on them, preventing normal JTAG operations.
To enable JTAG, connect +12V power through a 2.2kOhm resistor to pin 7 on the 68000 CPU connector. Afterwards flash the atf1502as_erase.svf file to the CLPD. Then you can follow the normal programming procedures.
- lvd for providing most of the above information and helping me come up with the Linux flashing procedure.
- majinga and go0se for testing and helping improve this procedure.
- EAB forum user katarakt for the note on Quartus.
- Szymon Roslowski and Graham P. for testing and improving the Windows package.