DIY-A586 v1.9 by piotr_go

No, I sent them with audio packets but the resolution is set to 640x480 so the bezel is torn. If there is no audio package, things are easy to do.
Understandably, you let NES linger so he can catch the timing right.
If you share your snap code, I would appreciate your help

Hi, I have recently built this and have enjoyed doing so, but I seem to have an issue whenever I try to load a .rom. I have to browse the SD card to the location and then manually select, otherwise I get an error like:
FLASH: file missing!
KICK31SD.ROM

No matter where I put the rom files or upper/lowercase they never seem to find them.

You have to upload ROM to flash. F4 key.
If flash was not formatted, format first.

piotr_go wrote:

You have to upload ROM to flash.

Thanks, that worked.
Is there a specific rom for 3.1SD ?
I would like to use the SD for HD Partitions.

Check MD5 sum in:
https://github.com/piotr-go/DIY-A586/blob/mas...ick3.x%20sd%20patch%20(xdelta3)%20v0.8.tar.gz
in "patch.sh"

==== update ====
Looks like i forgot to upload rom patches for v1.9.
Amiga core will work with 1.6 patches, but have less ram.
I will upload shortly.

Great thanks.
No rush, I will wait for the 1.9 specific patches.

Amiga ROM patch for v1.9:
https://github.com/piotr-go/DIY-A586/blob/mas...ick3.x%20sd%20patch%20(xdelta3)%20v0.8.tar.gz
If some software does not work correctly with 8MB CHIP RAM, try patch from v1.6 or original ROM.

Thank you for the speedy upload, it is appreciated.
A couple of questions?
1, I am having issues with hanging when copying over files from my 3.0 or 3.1 workbench disks when the system asks for a valid workbench disk. It hangs forever and corrupts the disk on reset.
I have noticed the Max Transfer isn't set to recommended settings, could this be the issue?

2, I do not own a PS/2 mouse, just keyboard(pain to navigate), Is it possible to use an Amiga mouse in a DB9 port?

mrzappeh wrote:

I am having issues with hanging when copying over files from my 3.0 or 3.1 workbench disks

Floppy -> SD ?

mrzappeh wrote:

Max Transfer isn't set to recommended settings, could this be the issue?

Probably.

mrzappeh wrote:

Is it possible to use an Amiga mouse in a DB9 port?

Not yet.

"High density" experiments with a PC station


Mikan 0.1.4 with "auto switch" function. Where you insert the first floppy after the reset will be DF0.



For the switch to work properly, both stations must generate RDY.
LEDs for stations that do not generate an RDY signal.

I haven't tested the gotek yet, I'm waiting for new PCBs (from the diagram above) that have a slightly larger spacing of connectors.

Hi

@piotr_go congratulations on the next installment of the project ;)

As a total layman in FPGA systems, I have a few questions, and I am still before the stage of blinking the diode
Let's assume that I would like to run DIY-a586 on e.g. tango nano 9k, how do I know that the FPGA data is sufficient to simulate the given peripherals?
Is every FPGA able to simulate transmission lines like HDMI or displayport i2s on its I/O ports if there are no dedicated function blocks for this purpose?
What is the case of transferring one batch, e.g. written under XC6SLX9 to, for example, Cyclone I/II/III or others?
What should you really be guided by when choosing a given FPGA, apart from the number of LUT elements?
From what I checked, systems that have more than 25k logical units are usually already in BGA housings, hence my question, could it not be possible to separate functional blocks into smaller FPGAs? e.g. tango nano 9k only for graphics, and other smaller ones for the CPU and other peripherals?
What bus should these systems be connected to make everything work properly?

Hetii wrote:

how do you know that the FPGA data is enough to simulate the given peripherals?

Only synthesis gives 100% certainty. It's hard to tell with a complex design. With CPLD you could count.

Hetii wrote:

Is every FPGA able to simulate transmission lines like HDMI or displayport i2s on its I/O ports if there are no dedicated function blocks for this purpose?

Must be serializers. Too much speed to do without them.

Hetii wrote:

What is the case of transferring one batch, e.g. written under XC6SLX9 to, for example, Cyclone I/II/III or others?

You have to rewrite the blocks specific to your layout. (PLL/IO/...)

Hetii wrote:

What should you really be guided by when choosing a given FPGA, apart from the number of LUT elements?

Speed, BRAM, serializers...

Hetii wrote:

systems that have more than 25k logical units are usually already in BGA housings, hence my question, would it not be possible to separate functional blocks into smaller FPGAs?

Then the number of IO will become a problem, and we return to BGA

I came across this interesting project a week ago and now I think I would like to build it. I've read the entire thread and have a few questions:
1. After uploading the main.bin file to the flashrom, do I need to do anything else or is it enough to prepare an SD card with the Amiga ROM and it will work?
2. When using a PC disk drive with version 1.9 of the project, do I have to convert the drive to an Amiga one?
3. Is there a .cpl file available that can be provided when ordering boards so that the factory can solder at least some of the elements?
4. Will version 2.0 of 020 and AGA ever be available?

1. You still need to upload the Amiga core from the SD card, format the flash and load the ROMs.
2. The PC station must be converted to an Amiga one.
3. No.
4. Not soon.

Thank you for the quick reply. Reworking the station will be a bit of a pain, so I'd probably do it once I get the chip up and running, and there's going to be some soldering going on here. Gotek from FlashFloppy, from what I've read, is compatible with the Amiga by default, so just load FF and leave the jumper in s0?

sillycon wrote:

Gotek from FlashFloppy, from what I've read, is compatible with the Amiga by default, so just load FF and leave the jumper in s0?

Yes.

I sat down for a while and I have an incomplete BOM in Digikey - there are no capacitors, headers and DB9M, which are astronomically priced, so you will have to look elsewhere.

The USB port for the mouse and keyboard in DK is marked as TYPE-A - unfortunately, DK does not have such nice ones as in the picture in the project: https://github.com/piotr-go/DIY-A586/raw/master/v1.9 /img/foto_003.jpg

My incomplete list:
https://www.digikey.co.uk/en/mylists/list/XSJ6X819MY

+ chips and switches from ALI:
XC6SLX9-2TQG144 - https://www.aliexpress.com/item/1005002603522383.html
SPX1117-1.2V - https://www.aliexpress.com/item/1005004501859038.html
MAX3232CSE - https://www.aliexpress.com/item/1005003581915749.html
switches: https://www.aliexpress.com/item/1005005274168459.html - type 3

Questions:
1. As DK does not have W9825G6KH-5 in stock - will the W9825G6KH-6 memory fit https://www.aliexpress.com/item/1005005513966661.html
2. Shouldn't 1N4148 be in SOD323 or SOD123 rather than 0603 (entered in BOM)?
3. Ferrite bead is supposed to have some value?
4. 15 e.g. 0603 in BOM is just 0 Ohm jumper?
5. Headphone jack rather not from these, because I see on the PCB that it is supposed to have 5 contacts - https://www.aliexpress.com/item/1005002162553876.html

I hope I didn't make any mistakes, I'll correct the post if necessary.

sillycon wrote:

The USB mouse and keyboard port on the DK is labeled TYPE-A

PS/2
https://www.lcsc.com/product-detail/Circular-...ctors_CONNFLY-Elec-DS1093-01-PN60_C77848.html

sillycon wrote:

XC6SLX9-2TQG144 - https://www.aliexpress.com/item/1005002603522383.html

wow what a price
https://www.lcsc.com/product-detail/Programma...LDs-FPGAs_XILINX-XC6SLX9-2TQG144C_C27408.html

1 should be OK
2. there are also 0603 (https://www.tme.eu/pl/katalog/?search=4148%200603&s_field=accuracy&s_order=desc), but you can give something in similar dimensions
3. for several hundred mA
4. not populated - do not assemble
5. https://www.lcsc.com/product-detail/Audio-Connectors_HOOYA-PJ322_C2939185.html

Fantastic!
There will even be 1N4148 at 0603 at Digikey. The search engine is a bit tricky.

LCSC looks like a pretty good source for parts. Will take advantage for sure by ordering Spartan and other chips not available in DK. Thank you for the links.

Ferrite bead I see that it sits in the power supply to the SD. Only now I looked at the schematic - I assume that it is supposed to have high impedance for higher frequencies and low self-resistance. Should something like this fit? https://www.digikey.co.uk/en/products/detail/murata-electronics/BLM18KG102SN1D/7798421

sillycon wrote:

Should something like this fit? https://www.digikey.co.uk/en/products/detail/murata-electronics/BLM18KG102SN1D/7798421

May be.

Hi, I'm very interested in this DIY-A586.
Unfortunately I'm not skilled enough to solder it on my own, though. Is there a way to buy this final assembled PCB?

Instead of SPX1117-1.2V, it will probably be AMS1117-1.2. The manufacturer never seems to have a 1.2V regulator at all, see: https://www.maxlinear.com/product/power-manag...and-regulators/linear-regulators-ldos/spx1117

The legs appear to be the same:
https://assets.maxlinear.com/web/documents/sipex/datasheets/spx1117.pdf
https://datasheet.lcsc.com/lcsc/2211090930_TWGMC-AMS1117-1-2_C5250987.pdf

sillycon wrote:

Instead of SPX1117-1.2V, it will probably be AMS1117-1.2. In general, it seems that the manufacturer has never had a 1.2V regulator

Possible. I have SPX1117 in the library and I probably only changed the tip when drawing the schematic.
On the PCB, I solder what I find first (1117 from any manufacturer).

Instead of 74HCT2G125, it is better to take 74AHCT2G125DP, 125 or 74HC2G125DP, 125. It seems that at 5 V it should not matter.

74AHCT2G125
HCs are not suitable. Not these input voltage levels.

at what frequency does the A586 clock the memory? I still wonder if the W9825G6KH-6 will be a good replacement:

Current cores require 133MHz/CL2 max. (core PC)

By the way, I took a look at Minimig, which is an open project and can also be built.

The following observations occurred to me:
1. Minimig seems much more complicated, 6 layers and larger PCB area,
2. A586 v1.9 should be faster than Minimig in standard configuration; which requires a CPU (7-50MHz as standard).
3. Minimig requires more parts and CPU on the board, but it can be accelerated with an accelerator.
4. on A586 we have more memory 32MB vs 6MB (Minimig)
5. The A586 has a more future-proof HDMI vs VGA output in a minute
6. Minimig uses an older PGA which is harder to come by and more expensive if someone wanted to assemble.
7. Bios (Winbond) in A586 allows you to program PGA without add-ons - I don't know if Minimig also has such an option(?)
8. Minimig is already a few years old so you can count on the fact that the developers have refined the fixes during this time, does the A586 have similar compatibility?

Generally, kudos to @piotr_go, because the hardware comparison tilts the scales in favor of the A586. I don't know what your plans are, but it would be nice to build a bigger community around the project.

The original minimig was probably 2-layered. 6MB SRAM probably costs a fortune, SDRAM is much cheaper.
Compatibility, hmmmm, at first I tried to compare with FS-UAE, I wrote a simple code displaying sprites, I adjusted DIY so that the effect was the same. Then I check the same thing on a real amiga, it works completely different!
Blitter and CPU are not cycle compatible because they are also different between Amiga models, so I figured it doesn't make sense. 8MB CHIP... because why not
It was supposed to be as fast as possible. Workbench is running briskly, so I'm happy.

I went ahead and ordered parts and plates. I will try to document the whole process. if anyone is interested, they will find the project log on github, it will be my first smd project before the thicker projects that I have planned. I don't have a hot air gun so I'll try soldering. it's hard when it breaks down.

the tiles have arrived so now it's time to plan and hence a few questions:
1. is there any particular order in which to solder? I think back first, front later and starting with the elements in the middle, looking if I am not closing the place for the entrance of the soldering iron.
2. what can I have soldered on the board so that I can still fasten with the programmer and program the flash? additional components sometimes interfere because they add their resistances and capacitances.
3. Are the capacitances from the scheme https://github.com/piotr-go/DIY-A586/blob/master/v1.9/pcb/v1.9/bottom.png on the right side cast as 100nF, do you need to solder or not ? in the picture https://github.com/piotr-go/DIY-A586/raw/master/v1.9/img/foto_004.jpg the capacities are not soldered.