New CPU card for A4000. - Page 4

jack-3d · 28 October 2015, 02:45

Beautiful PCB and very interesting project. Good job guys and keep it up! ;o)

hooverphonique · 28 October 2015, 11:07

what's the 4MB of flash for? large/multiple kickstarts?

strim · 28 October 2015, 11:13

Quote:

Originally Posted by hooverphonique

what's the 4MB of flash for? large/multiple kickstarts?

Boot ROM, drivers, also Kickstart images programmable from Amiga at some point.

Mr.Flibble · 28 October 2015, 11:47

This is looking really nice strim, excellent work!

Locutus · 28 October 2015, 12:17

Nice work, lets hope you dont need a new PCB spin :-))

strim · 11 November 2015, 17:06

Assembled prototype:

http://c0ff33.net/drop/DSCN6368.JPG
http://c0ff33.net/drop/DSCN6371.JPG

jbenam · 11 November 2015, 17:16

You should put an NSFW tag in front of those, strim - that's some raunchy hardware pr0nz you got there

Excellent progress! Is it booting already?

strim · 11 November 2015, 18:07

Quote:

Originally Posted by jbenam

Excellent progress! Is it booting already?

Not yet. Working on it

.

Hedeon · 13 November 2015, 11:22

Some cool stuff! Any indication why it is not booting yet? Except for the obviously missing 030 on the pictures :-P

jbenam · 13 November 2015, 11:26

Quote:

Originally Posted by Hedeon

Some cool stuff! Any indication why it is not booting yet? Except for the obviously missing 030 on the pictures :-P

There's one soldered (U1) on the SMD pads on the right of where the PGA socket should go

Mr.Flibble · 13 November 2015, 13:21

I'm really looking forward to this

strim · 13 November 2015, 14:31

Quote:

Originally Posted by Hedeon

Some cool stuff! Any indication why it is not booting yet? Except for the obviously missing 030 on the pictures :-P

68030 is installed in a QFP package. Not booting because CPLDs are still empty

.

strim · 20 November 2015, 10:42

Quote:

Originally Posted by Locutus

Nice work, lets hope you dont need a new PCB spin :-))

Actually we do, but fortunately the problem is not that severe and should be correctable with patch wires in this prototype

.

Hedeon · 20 November 2015, 16:27

So you found the error then? But it hasn't booted yet?

strim · 20 November 2015, 18:21

Fixed that error, there's one more it seems. Now it's yellow screen

. So at least got to Kickstart executing.

Hedeon · 25 November 2015, 15:00

Woohoo!

Looking at the exec source:

; Set up the Exception Vector Table. Vectors 2 through 47
; (Bus Error through TRAP #15) are all all set to the initial
; exception handler. If any exception occurs now, the screen
; will turn yellow, the power light will flash, and the computer
; will be reset.

So some unexpected exception.

strim · 25 November 2015, 15:13

Yep, got to that, still don't know what's causing it though. jarob is building a second prototype that will only have CPU attached and some wire patches instead of CPLDs... Hopefully it will be easier to figure out what's wrong.

Hedeon · 25 November 2015, 15:25

You could build a custom ROM to at least figure out which exception it is :-)

Stedy · 25 November 2015, 23:05

@strim

Have you checked the basics on your board yet?
Are the power supplies clean and stable?
Does the reset signal rise monotonically?
Is your clock reference the shape you expected?
Silly question maybe, have you fitted the correct sequence of jumpers?

Commissioning and testing CPU cards can be interesting and it is all too easy to overlook the obvious. Good luck with your project.

Ian

30 November 2015, 00:19

This is awsome!

Any progress?

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28 October 2015, 02:45	#61
jack-3d kLiker Join Date: Mar 2011 Location: Brno / Czech Republic Posts: 371	Beautiful PCB and very interesting project. Good job guys and keep it up! ;o)

28 October 2015, 11:07	#62
hooverphonique ex. demoscener "Bigmama" Join Date: Jun 2012 Location: Fyn / Denmark Posts: 1,624	what's the 4MB of flash for? large/multiple kickstarts?

28 October 2015, 11:47	#64
Mr.Flibble Registered User Join Date: Jun 2015 Location: UK Posts: 472	This is looking really nice strim, excellent work!

28 October 2015, 12:17	#65
Locutus Registered User Join Date: Jul 2014 Location: Finland Posts: 1,178	Nice work, lets hope you dont need a new PCB spin :-))

11 November 2015, 17:06	#66
strim NetBSD developer Join Date: May 2012 Location: Warsaw, Poland Posts: 411	Assembled prototype: http://c0ff33.net/drop/DSCN6368.JPG http://c0ff33.net/drop/DSCN6371.JPG

11 November 2015, 17:16	#67
jbenam Italian Amiga Zealot Join Date: Jan 2009 Location: Italy Age: 36 Posts: 1,912	You should put an NSFW tag in front of those, strim - that's some raunchy hardware pr0nz you got there Excellent progress! Is it booting already?

13 November 2015, 11:22	#69
Hedeon Semi-Retired Join Date: Mar 2012 Location: Leiden / The Netherlands Posts: 2,007	Some cool stuff! Any indication why it is not booting yet? Except for the obviously missing 030 on the pictures :-P

13 November 2015, 13:21	#71
Mr.Flibble Registered User Join Date: Jun 2015 Location: UK Posts: 472	I'm really looking forward to this

20 November 2015, 16:27	#74
Hedeon Semi-Retired Join Date: Mar 2012 Location: Leiden / The Netherlands Posts: 2,007	So you found the error then? But it hasn't booted yet?

20 November 2015, 18:21	#75
strim NetBSD developer Join Date: May 2012 Location: Warsaw, Poland Posts: 411	Fixed that error, there's one more it seems. Now it's yellow screen . So at least got to Kickstart executing.

25 November 2015, 15:00	#76
Hedeon Semi-Retired Join Date: Mar 2012 Location: Leiden / The Netherlands Posts: 2,007	Woohoo! Looking at the exec source: ; Set up the Exception Vector Table. Vectors 2 through 47 ; (Bus Error through TRAP #15) are all all set to the initial ; exception handler. If any exception occurs now, the screen ; will turn yellow, the power light will flash, and the computer ; will be reset. So some unexpected exception.

25 November 2015, 15:13	#77
strim NetBSD developer Join Date: May 2012 Location: Warsaw, Poland Posts: 411	Yep, got to that, still don't know what's causing it though. jarob is building a second prototype that will only have CPU attached and some wire patches instead of CPLDs... Hopefully it will be easier to figure out what's wrong.

25 November 2015, 15:25	#78
Hedeon Semi-Retired Join Date: Mar 2012 Location: Leiden / The Netherlands Posts: 2,007	You could build a custom ROM to at least figure out which exception it is :-)

25 November 2015, 23:05	#79
Stedy Registered User Join Date: Jan 2008 Location: United Kingdom Age: 46 Posts: 733	@strim Have you checked the basics on your board yet? Are the power supplies clean and stable? Does the reset signal rise monotonically? Is your clock reference the shape you expected? Silly question maybe, have you fitted the correct sequence of jumpers? Commissioning and testing CPU cards can be interesting and it is all too easy to overlook the obvious. Good luck with your project. Ian

30 November 2015, 00:19	#80
Zeecor Posts: n/a	This is awsome! Any progress?

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