English Amiga Board


Go Back   English Amiga Board > Search Forums

Showing results 1 to 40 of 114
Search took 0.02 seconds.
Search: Posts Made By: Kai
Forum: Hardware mods 24 January 2020, 13:57
Replies: 39
Views: 5,467
Posted By Kai
The only difference between the different v2 and...

The only difference between the different v2 and V3 is the placement on the board - the routing is automatic - nothing other than a layout change. It *could* be the distance in this case - I've been...
Forum: Hardware mods 24 January 2020, 13:54
Replies: 74
Views: 10,866
Posted By Kai
Just an FYI - this was never once billed as 100%...

Just an FYI - this was never once billed as 100% working and ready for use - it's a WIP project that i've put out there - the github exists for people to try it out, test, make changes etc - the...
Forum: Hardware mods 20 October 2019, 02:02
Replies: 39
Views: 5,467
Posted By Kai
Going to test this, hopefully just cascading them...

Going to test this, hopefully just cascading them should work.
Forum: Hardware mods 17 October 2019, 00:44
Replies: 39
Views: 5,467
Posted By Kai
v3 Boards now available, and the gerbers are up...

v3 Boards now available, and the gerbers are up on github.

https://www.pcbway.com/project/shareproject/Amiga_500__DRAM_Replacement_Board.html
Forum: Hardware mods 15 September 2019, 15:43
Replies: 39
Views: 5,467
Posted By Kai
Probably in the future, should be easy enough to...

Probably in the future, should be easy enough to adapt, or for someone else to fork the project.

Here's the rev0 DRAM board working in a v2.1 Amiga 500++ reproduction board, DIAGROM output for...
Forum: Hardware mods 15 September 2019, 15:41
Replies: 74
Views: 10,866
Posted By Kai
I wont add the board to PCBWay just yet - thats...

I wont add the board to PCBWay just yet - thats why everything is hosted on github - you can upload the gerbers in a .zip and have a batch made - i've not fully tested the AIO - it's will a WiP...
Forum: Hardware mods 22 August 2019, 14:18
Replies: 137
Views: 17,543
Posted By Kai
TSOP/SSOP all the logic! SMD the resistors/caps -...

TSOP/SSOP all the logic! SMD the resistors/caps - but make them the large ones that people that aren't so good at SMD would find a little easier - still saves space :)
Forum: Hardware mods 22 August 2019, 14:15
Replies: 74
Views: 10,866
Posted By Kai
It's a 2 layer design. The DRAM board plugs into...

It's a 2 layer design. The DRAM board plugs into the space where the 44256 DIP's go. can see here on my near complete A500++ repro board:
https://i.imgur.com/8hB1T5Ul.jpg?1

Without sockets...
Forum: Hardware mods 01 August 2019, 22:03
Replies: 74
Views: 10,866
Posted By Kai
It's a 2-layer board :)

It's a 2-layer board :)
Forum: Hardware mods 03 July 2019, 22:32
Replies: 24
Views: 2,956
Posted By Kai
https://i.imgur.com/9DXWQbal.jpg TA-DA! :D ...

https://i.imgur.com/9DXWQbal.jpg

TA-DA! :D

This time it fits!

Who wants to be a beta tester? :p
Forum: Hardware mods 03 July 2019, 22:20
Replies: 39
Views: 5,467
Posted By Kai
PCBWay delivery came in today! ...

PCBWay delivery came in today!

https://i.imgur.com/fhBdYY2l.jpg

https://i.imgur.com/wMo2dKGl.jpg

Everything lines up BANG ON! Pin spacings for the SOJ's and the DIP socket pins both nice and...
Forum: Hardware mods 03 July 2019, 15:53
Replies: 74
Views: 10,866
Posted By Kai
What sort of transfer speeds do you get with that?

What sort of transfer speeds do you get with that?
Forum: Hardware mods 29 June 2019, 21:51
Replies: 74
Views: 10,866
Posted By Kai
IDE is something i havent figured out quite yet -...

IDE is something i havent figured out quite yet - at least not a way that makes it easily accessible to hobbyists...I mean, i could integrate IDE in a way, but it wouldn't be autobooting...I'd...
Forum: Hardware mods 11 June 2019, 23:43
Replies: 24
Views: 2,956
Posted By Kai
Ok - i see what's happened, of all the DIP-64...

Ok - i see what's happened, of all the DIP-64 packages - I've gone and selected the ultra-wide one that no-one ever uses -_-

@project23 - i'll do a respin and a new batch of boards, and send you...
Forum: Hardware mods 11 June 2019, 21:23
Replies: 24
Views: 2,956
Posted By Kai
WTF?! :( Kicad assured me the pads are correct...

WTF?! :( Kicad assured me the pads are correct for that :(
Forum: Hardware mods 10 June 2019, 15:22
Replies: 74
Views: 10,866
Posted By Kai
Here we go - decoupling caps placed better, and...

Here we go - decoupling caps placed better, and better copper fill: https://github.com/kr239/A500-14Mhz-Accelerator

And integrated into the 8MB FastRAM here:
...
Forum: Hardware mods 10 June 2019, 14:20
Replies: 39
Views: 5,467
Posted By Kai
Haha - this is mostly for the resurrection of...

Haha - this is mostly for the resurrection of A500+'s that have been killed off by VARTAAAAA
Forum: Hardware mods 10 June 2019, 14:19
Replies: 24
Views: 2,956
Posted By Kai
The JEDs should work fine - I just wanted to make...

The JEDs should work fine - I just wanted to make sure and compile it myself first :)
Forum: Hardware mods 04 June 2019, 16:20
Replies: 24
Views: 2,956
Posted By Kai
They have loads of the TSOP ones so i might do a...

They have loads of the TSOP ones so i might do a respin (v3) with SMD components, make it even smaller.
Forum: Hardware mods 04 June 2019, 15:22
Replies: 24
Views: 2,956
Posted By Kai
https://www.ebay.co.uk/itm/4X-GM71C18163CJ6-IC-CMO...

https://www.ebay.co.uk/itm/4X-GM71C18163CJ6-IC-CMOS-Dynamic-RAM-1-048-576-Words-x-16bits-16MEG-DRAM-SOJ42/222693860593?hash=item33d996a4f1:g:5xEAAOSwDkVZ8boE - those'll do :D
Forum: Hardware mods 04 June 2019, 15:09
Replies: 24
Views: 2,956
Posted By Kai
I'll be making these available for individual...

I'll be making these available for individual purchase at £8 + P&P per board as you have to order minimum quantities from the board houses.
Forum: Hardware mods 04 June 2019, 15:08
Replies: 24
Views: 2,956
Posted By Kai
Hmm - looks like digikey and mouser have just run...

Hmm - looks like digikey and mouser have just run out - an order will trigger their reinventory though.

IS41LV16105D-50KLI is another one to source as well. Both essentially the same.
Forum: Hardware mods 04 June 2019, 15:01
Replies: 74
Views: 10,866
Posted By Kai
Hmm - interesting stuff - i wonder if there's an...

Hmm - interesting stuff - i wonder if there's an option in the board setup for that...
Forum: Hardware mods 04 June 2019, 15:00
Replies: 39
Views: 5,467
Posted By Kai
Not initially - but they won't be expensive :)

Not initially - but they won't be expensive :)
Forum: Hardware mods 04 June 2019, 10:23
Replies: 39
Views: 5,467
Posted By Kai
a1k.org released an A500+ board, but once they...

a1k.org released an A500+ board, but once they sold them all, and ran out of parts to sell with them, they stopped the run.

The new A500++ has been reverse engineered by Rob Taylor and looks like...
Forum: Hardware mods 04 June 2019, 10:17
Replies: 39
Views: 5,467
Posted By Kai
...you know what - you're absolutely right! XD ...

...you know what - you're absolutely right! XD

I was looking at the BOM and the mouser cart for the rev1, which did use all the original DIP socket pads - so apologies for getting that wrong, i'll...
Forum: Hardware mods 04 June 2019, 00:19
Replies: 74
Views: 10,866
Posted By Kai
...star power?

...star power?
Forum: Hardware mods 04 June 2019, 00:18
Replies: 39
Views: 5,467
Posted By Kai
16 strips of 10 then, however you want to phrase...

16 strips of 10 then, however you want to phrase it.
Forum: Hardware mods 03 June 2019, 21:14
Replies: 74
Views: 10,866
Posted By Kai
The 45 degree corners are in no way influenced by...

The 45 degree corners are in no way influenced by the monitors and paper from Battlestar Galactica...and certainly not a reference to cutting corners in design ;)
Forum: Hardware mods 03 June 2019, 21:14
Replies: 74
Views: 10,866
Posted By Kai
Lightbulb Yep - using freerouter with KiCad - export the...

Yep - using freerouter with KiCad - export the Specctra DSN, import into freerouter, let my R5-2600X plough through it, export the session file, re-import into KiCad.

Routing by hand would be...
Forum: Hardware mods 03 June 2019, 20:26
Replies: 39
Views: 5,467
Posted By Kai
It's for an A500+ - with both RAS0 and RAS1...

It's for an A500+ - with both RAS0 and RAS1 lines. You're correct - all RAM chips have A0 to A8 being fed in but as the originals are 4 bits wide, you need 4 to deal with D0 to D15 - plus there's the...
Forum: Hardware mods 03 June 2019, 02:33
Replies: 24
Views: 2,956
Posted By Kai
Version 2! ...

Version 2!

https://github.com/kr239/A500-8MB-FastRAM/tree/v2

Smaller! More SMD! (but still solderable by hand) RED! :D

https://i.imgur.com/YJAhm4Vh.png

Stepping stone to integrating a...
Forum: Hardware mods 03 June 2019, 01:00
Replies: 39
Views: 5,467
Posted By Kai
Lightbulb Step 1) Get PCB Step 2) Install components ...

Step 1) Get PCB
Step 2) Install components
Step 3) Remove the IC's from their sockets
Step 4) Plug this in to the IC socket space

I'm assuming you'll have removed the IC's, or will have...
Forum: Hardware mods 03 June 2019, 00:07
Replies: 74
Views: 10,866
Posted By Kai
As with my other projects, i'm putting direct...

As with my other projects, i'm putting direct links to them on PCBWay for anyone that wants to get some PCB's printed:
...
Forum: Hardware mods 02 June 2019, 23:56
Replies: 39
Views: 5,467
Posted By Kai
Added this to PCBWay for people wanting to just...

Added this to PCBWay for people wanting to just order PCB's quickly:

https://www.pcbway.com/project/shareproject/Amiga_500__DRAM_Replacement_Board.html
Forum: Hardware mods 02 June 2019, 19:40
Replies: 74
Views: 10,866
Posted By Kai
Okay - updated with decoupling caps: ...

Okay - updated with decoupling caps:

https://i.imgur.com/7o0ioXEh.png

Schematic, gerbers etc all updated.

Rotated the PLCC socket and instantly it only required 23 via's once the routing...
Forum: Hardware mods 02 June 2019, 17:43
Replies: 39
Views: 5,467
Posted By Kai
Lightbulb 1MB CHIP RAM replacement board for A500+

Just done a total respin of this, based around newer 40-pin SOJ ISSI DRAM chips - IS41C16257-35's and using SMD 1206 capacitors

This will give a total of 1MB (8Mbit) of CHIP RAM and shouldn't...
Forum: Hardware mods 02 June 2019, 17:02
Replies: 74
Views: 10,866
Posted By Kai
I did think about that, i'll add some more...

I did think about that, i'll add some more decoupling caps and update the github later :)

I think i was just concerned with adapting the original 1993 schematic in KiCad first - before hacking it...
Forum: Hardware mods 27 May 2019, 23:50
Replies: 269
Views: 47,341
Posted By Kai
Just a cheeky question - where did you source the...

Just a cheeky question - where did you source the card edge connectors for this?? Tried on mouser and turning up blank for 86 pin ones :/
Forum: Hardware mods 27 May 2019, 22:31
Replies: 74
Views: 10,866
Posted By Kai
Big grin Good catch! Uploaded to github now - sorry! Was...

Good catch! Uploaded to github now - sorry! Was late when i did it...
Showing results 1 to 40 of 114

 
Forum Jump

All times are GMT +2. The time now is 04:29.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Page generated in 0.08201 seconds with 10 queries