Files to burn to Eproms and Jumper functions

[asapreta]

Hi!
Where do I can find the contents for the 2716 Eproms? Are they the same as prom5 and prom6?

Also, what are the jumpers for?

Thank you!

[mengstr]

I downloaded my images from https://mirrors.apple2.org.za/Apple%20II%20Documentation%20Project/Interface%20Cards/Disk%20Drive%20Controllers/Apple%20Disk%20II%20Interface%20Card/ROM%20Images/

[btb]

The jumpers just go directly to your eprom's extra address lines, A8, A9 and A10, and you set them high or low to select the region of the eprom where you have placed the desired firmware.

[asapreta]

I downloaded my images from https://mirrors.apple2.org.za/Apple%20II%20Documentation%20Project/Interface%20Cards/Disk%20Drive%20Controllers/Apple%20Disk%20II%20Interface%20Card/ROM%20Images/

Thank you, I thought I need to be something diferent (code or so) to use on regular EEPROMs!

[asapreta]

The jumpers just go directly to your eprom's extra address lines, A8, A9 and A10, and you set them high or low to select the region of the eprom where you have placed the desired firmware.

So, as the code is "small" we can have different codes in the same IC, right? Interesting feature.

[asapreta]

And, I don't know why this project isn't popular. Do people think it won't work?

[btb]

I myself haven't gotten to test it yet (no disk drives), but it should work. @mengstr is your board working now?

[asapreta]

My main doubt was about the code to write in the EEPROMs as they are the same of the PROMs I will send the gerber to create the board and test it.

[btb]

I have built and tested my board, and it doesn't work without some rewiring, which I added to the wiki here: https://github.com/btb/DiskII/wiki/Revision-0-errata

After rewiring, I tested it successfully using the 16 sector firmware that @mengstr linked above.

[asapreta]

I have built and tested my board, and it doesn't work without some rewiring, which I added to the wiki here: https://github.com/btb/DiskII/wiki/Revision-0-errata

After rewiring, I tested it successfully using the 16 sector firmware that @mengstr linked above.

Thanks for all the information and testing.
I will try to redesign the board with your fixes.

When you mention unscrambled 16 sector firwmare, we have to change anything from the ones @mengstr linked from Asimov, or just burn to a regular eeprom?

Thank you!

[btb]

No changes needed to the firmware, just make sure you set the jumpers A8 A9 A10 as appropriate (i.e. all LO, assuming you put the .bin files at offset 0 in the EPROMs)

[btb]

The kicad project is now updated with correct wiring as well. I haven't updated the gerbers because I want to make some other changes before I release it as "revision 1"

[asapreta]

No changes needed to the firmware, just make sure you set the jumpers A8 A9 A10 as appropriate (i.e. all LO, assuming you put the .bin files at offset 0 in the EPROMs)

The kicad project is now updated with correct wiring as well. I haven't updated the gerbers because I want to make some other changes before I release it as "revision 1"

Well, this project is evolving a lot. Thank you.
I will wait for the updated gerbers then!

[btb]

Revision 1 is now, done, with gerbers here: https://github.com/btb/DiskII/releases/tag/rev1

[asapreta]

Revision 1 is now, done, with gerbers here: https://github.com/btb/DiskII/releases/tag/rev1

Thank you very much.
I will make a batch for me. There are some APII needing them here!

[btb]

Thank you very much. I will make a batch for me. There are some APII needing them here!

Great! Let me know how it goes, and check my notes here regarding the parts you need: https://github.com/btb/DiskII/wiki/Materials-Needed