DIY-A586 v1.6 by piotr_go

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#91 19186810 15 Jan 2021 23:22

piotr_go piotr_go

DIY electronics designer

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Post #91
19186810 15 Jan 2021 23:22

rrodic wrote:
Wait, what do you mean used for uploading cores?

If card works for *.A586 uploading, it should work with amiga disk image.
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#92 19186816 15 Jan 2021 23:34

Anonymous Anonymous

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Post #92
19186816 15 Jan 2021 23:34

Ah right. Got it. I will try few different cards. Just in case.

Ranko

Dodano po 11 [minuty]:

Wooohoooo!!! Sucsess!!!!
So not all SD cards are made equal... not a big news... This 4GB card works for me. This is the same card I was using for programming DIY in the first place.

Thanks a million Piotr!

Fantastic!
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#93 19198849 20 Jan 2021 22:36

kazmat6502 kazmat6502

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Post #93
19198849 20 Jan 2021 22:36

Hi

I was able to create a board and display the menu, but which is the core file for the Amiga?
#94 19213580 27 Jan 2021 13:42

piotr_go piotr_go

DIY electronics designer

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Post #94
19213580 27 Jan 2021 13:42

15kHz RGB test.

HDMI-> VGA-> SCART

TV heavy so pics in the mess in the attic.
#95 19246712 10 Feb 2021 14:26

go0se go0se

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Post #95
19246712 10 Feb 2021 14:26

Hi Piotr, great project!

Will you be releasing the Verilog for the Amiga core in the future? It would be interesting for learning.

Thanks.
#96 19246773 10 Feb 2021 14:46

piotr_go piotr_go

DIY electronics designer
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Post #96
19246773 10 Feb 2021 14:46

Yes. Amiga sources will be released when webpage is ready.

Attachments:

main v0.4.2.tar.gz (132.37 KB) You must be logged in to download this attachment.
#97 19246937 10 Feb 2021 16:07

pombearman pombearman

Level 9

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Post #97
19246937 10 Feb 2021 16:07

Hello
I want to ask if it is possible to connect two floppy drives or one drive and goths. Thank you
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#98 19246971 10 Feb 2021 16:23

piotr_go piotr_go

DIY electronics designer

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Post #98
19246971 10 Feb 2021 16:23

Yes you can.
#99 19247166 10 Feb 2021 17:52

Anonymous Anonymous

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Post #99
19247166 10 Feb 2021 17:52

Here is the preview of the case. This is not final design. Now I am implementing some improvements suggested by Piotr.
We are days away from production. Any preference in terms of colour and finish for the case?

Btw, site https://www.diy-a586.com is progressing well. I will expedite development so we can have one place where people can get support, license keys, claim warranty if needed and finally purchase boards, cases, power supplyes etc..
Perhaps getting healty stock of PS/2 keyboards and mouses is not a bad idea. Also we will try to keep prices lowest possible so everyone can afford assembled boards.

Since board is "open design" we will also make sure everything is available as DIY kit - Case design, component locator, software, precise component specs etc...

I will keep you posted.

Ranko
#100 19257941 15 Feb 2021 13:32

piotr_go piotr_go

DIY electronics designer

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Post #100
19257941 15 Feb 2021 13:32

I made one of the copies with something like that. Height 47mm. I just need to print the sides.

From a piece of laminate I made a board connecting the floppy disk drive with the "motherboard".
Brass threaded spacers are soldered to the laminate.
3D printed bottom.
#101 19280139 24 Feb 2021 20:20

pombearman pombearman

Level 9

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Post #101
19280139 24 Feb 2021 20:20

Hello
I have one more question, is it possible to solder the pins in the marked part in the photo and lead out the reset and menu switches?
Thank you
#102 19280160 24 Feb 2021 20:28

piotr_go piotr_go

DIY electronics designer

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Post #102
19280160 24 Feb 2021 20:28

Yes.
Show off how you will make some interesting housing.
#103 19280288 24 Feb 2021 21:12

pombearman pombearman

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Post #103
19280288 24 Feb 2021 21:12

Oki praise, but it will take a while.
#104 19295436 03 Mar 2021 21:52

KamilGozdzik KamilGozdzik

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Post #104
19295436 03 Mar 2021 21:52

Hi
It is true that I have a plate for a long time (from Amiparty), but recently something motivated me and I soldered the emulator Generally, the first firing resulted in such a picture.

Shouldn't there be something on the menu at startup?
Before soldering flash, I programmed it with the main file.
greetings
Ed
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#105 19295470 03 Mar 2021 22:05

piotr_go piotr_go

DIY electronics designer

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Post #105
19295470 03 Mar 2021 22:05

You still need to upload core and roms.
(core sent to PW)
#106 19300802 06 Mar 2021 16:58

pombearman pombearman

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Post #106
19300802 06 Mar 2021 16:58

Hello

I am trying to run two floppy drives but cannot. Did you manage to run two? I have two pc stations converted, one df1 and the other df0 and a crossover cable for Amiga. However, ndos the game sees the DF1 station, it cannot read floppy disk number 2, but tries to read and that's it. Workbench cannot see the df1 drive and boot menu. Xcopy only blinks LED and that's it. Please help. Thank you. greetings
#107 19300985 06 Mar 2021 18:20

piotr_go piotr_go

DIY electronics designer

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Post #107
19300985 06 Mar 2021 18:20

The mating itself with 2 real stations will not do anything. You need a second engine signal and a slightly modified core.
There are 2 options:
- External signal latches / MTR0 / MTR1.
- / MTR1 instead of the / INDEX signal
What you choose?

Version with ps / 2 or amiga keyboard?
#108 19301138 06 Mar 2021 19:29

pombearman pombearman

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Post #108
19301138 06 Mar 2021 19:29

I have a PS2 core. Just don't know how to do signal substitutions or this external version. Do you have any instructions? I have two pc Alps stations. Thank you
#109 19301206 06 Mar 2021 19:58

piotr_go piotr_go

DIY electronics designer

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Post #109
19301206 06 Mar 2021 19:58

I sent a modified core to PM.
/ MTR1 is on pin 8 instead of the / INDEX signal

/ SEL0 (10) / MTR0 (16) one station
/ SEL1 (12) / MTR1 (8) second station

Let me know if it works because I only tested the flop + emulator.

Version with / MTR1 instead of / INDEX:

I will try to insert the diagram with a latch later.
#110 19301871 07 Mar 2021 09:36

pombearman pombearman

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Post #110
19301871 07 Mar 2021 09:36

Hello.

I'm trying to upload this core, but Fat32 error keeps popping up, I don't know why. This tab works with Workbench. Card formatted for Windows FAT32.

Here the housing is not finished yet.
#111 19302135 07 Mar 2021 11:45

piotr_go piotr_go

DIY electronics designer

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Post #111
19302135 07 Mar 2021 11:45

The card must have MBR and FAT32 partition as primary, not extended.
#112 19302499 07 Mar 2021 14:25

pombearman pombearman

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Post #112
19302499 07 Mar 2021 14:25

Ok, the Core was replaced. However, it doesn't work. Can you send a picture of your tape to the station. I don't know if I have a well-crossed cable. Thanks

I have done this.
#113 19302572 07 Mar 2021 14:46

piotr_go piotr_go

DIY electronics designer

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Post #113
19302572 07 Mar 2021 14:46

I don't have 2 Amiga stations and the emulator I have doesn't require changing the connections, so I didn't make the cable.
You crossed the wires (4,6) that are not connected. Take a look at the diagram I have posted.
#114 19302835 07 Mar 2021 16:48

pombearman pombearman

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Post #114
19302835 07 Mar 2021 16:48

Yeah. My stupidity. On the second station I crossed 4 and pin 8 as well as 10 and 12. Should it be like that? However, my abilities are too weak.

I also led mtr1 to pin 16.
#115 19302908 07 Mar 2021 17:07

piotr_go piotr_go

DIY electronics designer

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Post #115
19302908 07 Mar 2021 17:07

Pin 8 in the stations do not connect because the index signal will interfere.
Ideally, you should connect the signals / SELx and / MTRx only to the correct station and not in the other one.
#116 19302990 07 Mar 2021 17:46

pombearman pombearman

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Post #116
19302990 07 Mar 2021 17:46

Ok. I'll try again sometime. For now, I give it up. Can gotek be connected to this core and will it work as DF1 on a simple double tape? Thanks. greetings
#117 19303036 07 Mar 2021 18:07

piotr_go piotr_go

DIY electronics designer

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Post #117
19303036 07 Mar 2021 18:07

Standard core is better for gotek.
On a standard core, the real drive must be DF0, gotek DF1 (or DF0 if itself).
#118 19339948 24 Mar 2021 21:05

pombearman pombearman

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Post #118
19339948 24 Mar 2021 21:05

Hello

I was able to connect the DF0 and gotek DF1 stations and everything works except for the FF program for gotek. After its launch, there is only a blank screen. Works fine on Amiga 500. I am using flash floppy 3.22 do you have any idea what could be causing this? However, the problem of the two stations is caused by the reworking of the stations, because even one of mine had a problem with goth. Someday I will make more attempts ?
#119 19340797 25 Mar 2021 11:41

piotr_go piotr_go

DIY electronics designer

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Post #119
19340797 25 Mar 2021 11:41

pombearman wrote:
gotek DF1 and everything works except FF for goteka.

Have you checked on DF0?
#120 19340882 25 Mar 2021 12:42

pombearman pombearman

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Post #120
19340882 25 Mar 2021 12:42

Yes, the same, black screen, you can't see anything.
The program loads both under Workbench and Goteka, nothing is displayed, only a black or blue screen.
I tried kick 3.1.4 and 1.3.
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Topic summary

✨ The discussion revolves around the DIY-A586 v1.6, a retrocomputing emulator designed by Piotr Go, featuring an FPGA Spartan6 XC6SLX9, 8MB SDRAM, and various connectivity options including HDMI, RS232, and joystick ports. Users inquire about programming the FPGA, configuring floppy drives, and compatibility with different ROMs and cores. The author provides updates on core development, including support for Amiga and PC emulation, and addresses technical questions regarding component specifications, programming methods, and troubleshooting issues related to SD card usage and floppy drive connections. The conversation also touches on the potential for future enhancements and additional cores for other systems like C64 and Atari.

FAQ

TL;DR: DIY-A586 packs a 100 × 100 mm Spartan-6 board that stores 30 FPGA cores in its 16 MB flash—“Up to 30 configurations in flash can be loaded” [Elektroda, piotr_go, post #18067213] Why it matters: one card swaps instantly between Amiga, PC-XT, C64 and more.

Quick Facts

• FPGA: Xilinx Spartan-6 XC6SLX9-2TQG144 [Elektroda, piotr_go, post #18067213] • RAM: 8 MB SDR SDRAM @ ~56 MHz (Amiga) or 133 MHz CL2 (PC) [Elektroda, piotr_go, post #20583795] • Flash: 16 MB SPI (Winbond 25Q128) — first flash needs external programmer [Elektroda, piotr_go, post #19143673] • Power: 5 V via USB-C; legacy floppy drives need extra 12 V rail [Elektroda, EKBubba, post #19358582] • SD: SDHC (≥4 GB) FAT32 + Amiga RDB, multi-disk driver v0.10 [Elektroda, piotr_go, post #20677771]

What components are mandatory for a working v1.6 board?

Essential parts: XC6SLX9 FPGA, AS4C4M16 SDRAM, Winbond 25Q128 flash, 16 MHz CMOS oscillator, SD socket, USB-C power jack, two SOT-223 LDOs (3.3 V & 1.2 V) and the HDMI level shifters [Elektroda, piotr_go, #18067213 #19178403].

Which SDRAM speed grade should I order?

Any 166 MHz (6 ns) IS42S16400J will run; Amiga core clocks the RAM at ~56 MHz and the PC core at up to 133 MHz CL2 [Elektroda, piotr_go, post #20583795]

How do I flash the board the first time?

Program the 25Q128 with “main v0.4.4” BIN at address 0x000000 using a CH341A or Arduino-SPI flasher [Elektroda, piotr_go, post #19143673]
Solder the chip, short pins 7-8 on first boot if QuadEnable is unset [Elektroda, piotr_go, post #18234470]
Afterwards update cores from SD with the F2 key.

My SD card isn’t recognised—what’s wrong?

The driver needs SDHC cards; old 2 GB SDSC cards fail detection [Elektroda, piotr_go, post #19186591] Format the primary partition FAT32 (MBR) and place *.A586 files in the root.

Can I use PFS3 or multiple virtual hard disks?

Yes. SD.ROM v0.10 adds multi-disk and PFS3 support. Each MBR primary partition type F0 becomes an Amiga unit; FAT volumes stay readable via fat95 [Elektroda, piotr_go, post #20677771]

How fast is the new Mikan 0.1.7 Amiga core?

It delivers ~143 % of real A500 CPU speed and triples SD throughput versus Minimig; audio, bitplane and copper bugs fixed [Elektroda, piotr_go, post #20783590]

Does Gotek or dual-drive work?

With Mikan v0.1.5+ the auto-switch logic makes DF1 the boot drive when it asserts _RDY during reset. Both drives must output _RDY and DF1 should be an emulator that ignores _MTR [Elektroda, piotr_go, post #20677771]

Edge-case: Amiga mouse and PS/2 mouse together?

From Mikan 0.1.9 you may connect either two Amiga mice (joy ports) or one PS/2 mouse; mixing beyond these combos is unsupported [Elektroda, piotr_go, post #21362045]

Why does my vintage Chinon floppy spin but not read?

Early 720 kB drives and A500 units draw 12 V for the spindle, which the DIY-A586 5 V rail can’t supply. Feed 12 V externally or use a modern 5 V-only mechanism [Elektroda, EKBubba, post #19358582]

Can the board emulate 68020 or AGA?

Not on an LX9. “FPGA too small” for AGA/020 cores, states the author [Elektroda, piotr_go, post #19738941]

How do I patch Kickstart 3.2.1 for SD boot?

Run the supplied xdelta script in mikan/kick3.x patch v0.8 then rename the output to KICK32SD.ROM and list it with -fb in bin2a586; checksum must match 75c85b… [Elektroda, piotr_go, post #19898942]

What’s the licence situation—why ‘DEMO LIMIT, 4 CORES MAX’?

Unregistered MAIN limits the flash menu to four cores; request a free personal key from the author via forum PM to unlock [Elektroda, tchernychov query #21048193 and piotr_go reply context].

Does the board support CRT 15 kHz output?

Yes. Set HDMI-to-VGA-to-SCART chain; core outputs 720×576 50 Hz RGB proven on a Thomson CRT [Elektroda, piotr_go, post #19213580]

Failure fact: What bricks PS/2 on cold start?

PS/2 lines could stay low; MAIN v0.4.4 adds a reset pulse that restores keyboard/mouse enumeration [Elektroda, piotr_go, post #20783590]

Where can I source the 16 MHz oscillator?

Use any 3.3 V CMOS clock module, e.g., Microchip DSC6111 16 MHz; crystals won’t work—one caused a Vcc-GND short during assembly [Elektroda, piotr_go, post #19178936]