A3640 Rev 3.3 PCBs - Page 11

Chucky · 23 February 2018, 23:03

bahh skip those big vias too mucgh work. maybe implement Mathesar DS1100Z-25 on the board instead.. YUP! that will be done..

Amiga87 · 23 February 2018, 23:34

Re new vias, I was thinking that was going to be a big job. Just as easy to solder wires to the ic pads anyway for prototyping.

Chucky · 23 February 2018, 23:44

yup.. so soon I have made a place for the delayline aswell..

Chucky · 24 February 2018, 00:11

Well did some modifications.. hope they are ok.. should be

mattymuc · 24 February 2018, 00:27

That looks great, Chucky!

Chucky · 24 February 2018, 00:41

As I haven't tested this yet (just did it..

) this download will be on YOUR risc.

I will order some PCBs when I am done with the devboard for my Rev2 project..

http://www.hertell.nu/webfiles/A3660Rev11.zip

Mathesar · 24 February 2018, 08:36

Quote:

Originally Posted by Chucky

As I haven't tested this yet (just did it..

) this download will be on YOUR risc.

I will order some PCBs when I am done with the devboard for my Rev2 project..

http://www.hertell.nu/webfiles/A3660Rev11.zip

Many thanks for this

Can't wait to order and build this

I checked the changes by overlaying the gerber files and found a small error on the top layer near C204, see attached picture.
All the other changes on top and bottom seem correct to me but I didn't check the inner layers as the offsets are different and Viewmate doesn't like that for the inner layers.

EDIT: forgot what I said, the error was in rev1.0!!!! Rev 1.1 is OK

Chucky · 24 February 2018, 08:39

oh I had that reported. didn't I fix it.. bah! will do after breakfast

Mathesar · 24 February 2018, 08:48

Ok, got the inner layers working into viewmate now, the VCC pin of the DS1100Z seems not connected to the power plane (layer 3).

PS my breakfast was at 7:00AM!

Chucky · 24 February 2018, 08:56

weiird.. checked in sprint..

edit: ahh not so weird. as it is a trace to the cap that feeds the delayline aswell... so. it is ok

Mathesar · 24 February 2018, 09:05

Quote:

Originally Posted by Chucky

weiird.. checked in sprint..

edit: ahh not so weird. as it is a trace to the cap that feeds the delayline aswell... so. it is ok

Check, I see it as well. Sorry for all the false alarms. I guess I was not fully awake yet

.

I will also order a batch of PCB's this weekend. My A3000 has been without a 060 for far too long now.

Thanks again for this wonderful project!

Chucky · 24 February 2018, 09:06

Well next step is to get this CoreEP3C16 FPGA devboard to a A3660 Rev2 devboard working and move all old shit to that one (NO cpu will still be a real one!) and add some memory and stuff..

so time to do serious pcb cadding (in eagle) so I can order those..

Mathesar · 24 February 2018, 13:42

Quote:

Originally Posted by Chucky

Well next step is to get this CoreEP3C16 FPGA devboard to a A3660 Rev2 devboard working and move all old shit to that one (NO cpu will still be a real one!) and add some memory and stuff..

so time to do serious pcb cadding (in eagle) so I can order those..

Have you also considered using KiCad? I find KiCad easier to work with than Eagle and the 3D viewer is quite handy to see what the final board will look like.

The Altera chips are nice, how are you going to handle the 3V3/5V level shifting? I guess it will be easy with a 68060 CPU as that one is 3V3 anyway. Than you only have to convert the signals coming from the motherboard. I was looking at this project on Github:
https://github.com/ezrec/galpal
It can convert jedec files into a verilog model. If it works you can just clone the whole thing into an FPGA wihout coding! (Of course you still need to do some hard work to add memory, it will probably be a whole new design then)

We need more people like you and PlasmaB. Closed source Amiga's are no longer the way to go. For example, the Amy board looks like incredible fun: http://eab.abime.net/showthread.php?t=90771
But why did they not open up the sources

Chucky · 24 February 2018, 13:57

I have looked at the TXB0108 autosensing levelshifters..
and to replace the old buffers I will use 74LVCH162245 so internnaly on the board. everything will be fully 3.3V

kicad.. yes.. I will move there someday. but I decided to do the devpcb in eagle. then when I do the final product.. it will be done in kicad.

zerohp · 24 February 2018, 15:00

TXB0108 is meant for push-pull CMOS, not open drain. It might work but it's going to affect the propagation delay.

Chucky · 24 February 2018, 15:19

Bah.. so somewhat "back to drawingboard"

Chucky · 16 March 2018, 18:13

Today PCBs arrived.

I also got my Experimental PCB:

Magic · 16 March 2018, 19:13

Awesome!

Mathesar · 16 March 2018, 20:28

Beautiful!!!!

Do you have any of those rev1.1 boards for sale? I'm interested!

grelbfarlk · 16 March 2018, 20:39

Awesome! Kickin Rad!

24 February 2018, 00:11	#204
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	Well did some modifications.. hope they are ok.. should be Attached Thumbnails

24 February 2018, 08:48	#209
Mathesar Registered User Join Date: Aug 2014 Location: Netherlands Posts: 698	Ok, got the inner layers working into viewmate now, the VCC pin of the DS1100Z seems not connected to the power plane (layer 3). PS my breakfast was at 7:00AM! Attached Thumbnails

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Commodore A3640 Rev. 3.1 watchdog mod	trixeo	Hardware mods	2	01 March 2014 11:45
A3640 rev 3.2	bpco	MarketPlace	1	27 May 2010 09:15
FS: Minimig PCBs and Keyrah FS	Kristian95	MarketPlace	7	03 October 2007 12:33
Ebay at 1 USD : A3640 Rev 3.1 for Amiga 4000 running at 32 Mhz !!!	Effy	MarketPlace	21	01 August 2005 15:05
A3640 Rev 3.0 accelerator card problem	Tony Landais	support.Hardware	3	23 December 2003 09:41

23 February 2018, 23:03	#201
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	bahh skip those big vias too mucgh work. maybe implement Mathesar DS1100Z-25 on the board instead.. YUP! that will be done..

23 February 2018, 23:34	#202
Amiga87 Registered User Join Date: Oct 2017 Location: Sydney/Australia Posts: 28	Re new vias, I was thinking that was going to be a big job. Just as easy to solder wires to the ic pads anyway for prototyping.

23 February 2018, 23:44	#203
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	yup.. so soon I have made a place for the delayline aswell..

24 February 2018, 00:27	#205
mattymuc Registered User Join Date: Jul 2017 Location: Munich / Germany Posts: 88	That looks great, Chucky!

24 February 2018, 00:41	#206
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	As I haven't tested this yet (just did it.. ) this download will be on YOUR risc. I will order some PCBs when I am done with the devboard for my Rev2 project.. http://www.hertell.nu/webfiles/A3660Rev11.zip

24 February 2018, 08:39	#208
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	oh I had that reported. didn't I fix it.. bah! will do after breakfast

24 February 2018, 08:56	#210
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	weiird.. checked in sprint.. edit: ahh not so weird. as it is a trace to the cap that feeds the delayline aswell... so. it is ok

24 February 2018, 09:06	#212
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	Well next step is to get this CoreEP3C16 FPGA devboard to a A3660 Rev2 devboard working and move all old shit to that one (NO cpu will still be a real one!) and add some memory and stuff.. so time to do serious pcb cadding (in eagle) so I can order those..

24 February 2018, 13:57	#214
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	I have looked at the TXB0108 autosensing levelshifters.. and to replace the old buffers I will use 74LVCH162245 so internnaly on the board. everything will be fully 3.3V kicad.. yes.. I will move there someday. but I decided to do the devpcb in eagle. then when I do the final product.. it will be done in kicad.

24 February 2018, 15:00	#215
zerohp Registered User Join Date: Dec 2017 Location: Champaign, IL / USA Posts: 7	TXB0108 is meant for push-pull CMOS, not open drain. It might work but it's going to affect the propagation delay.

24 February 2018, 15:19	#216
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	Bah.. so somewhat "back to drawingboard"

16 March 2018, 18:13	#217
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	Today PCBs arrived. I also got my Experimental PCB:

16 March 2018, 19:13	#218
Magic Registered User Join Date: Aug 2007 Location: USA Posts: 362	Awesome!

16 March 2018, 20:28	#219
Mathesar Registered User Join Date: Aug 2014 Location: Netherlands Posts: 698	Beautiful!!!! Do you have any of those rev1.1 boards for sale? I'm interested!

16 March 2018, 20:39	#220
grelbfarlk Registered User Join Date: Dec 2015 Location: USA Posts: 2,933	Awesome! Kickin Rad!

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)