Search found 77 matches

by Chris
Mon Sep 09, 2013 10:11 am
Forum: Programming
Topic: Mouse / Keyboard interface
Replies: 11
Views: 29367

Re: Mouse / Keyboard interface

In addition I added a timeout in the mouse init function of the Atmega8 firmware. This prevents hanging in a loop forever when there is no mouse connected. Simon Good call, I had noticed there was no handling of the retun codes from the mouse just reading byte and move on. I had assumed it was just...
by Chris
Thu Sep 05, 2013 7:02 pm
Forum: Programming
Topic: Mouse / Keyboard interface
Replies: 11
Views: 29367

Re: Mouse / Keyboard interface

Just a quick look but the actual send logic seems ok so I would agree it seems an 'hard' comms problem

Regards

Chris
by Chris
Wed Sep 04, 2013 3:34 pm
Forum: Programming
Topic: Mouse / Keyboard interface
Replies: 11
Views: 29367

Re: Mouse / Keyboard interface

I have done some AVR programming in my time so I could take a look. First question is what type of mouse are you using and do you initialise it? setting MS Intellimouse mode make it send 4 bytes not 3 as they have Z data for the scroll button. This site has some great info http://www.computer-engine...
by Chris
Tue Jun 18, 2013 1:43 pm
Forum: Programming
Topic: Some old-school effects
Replies: 2
Views: 11273

Re: Some old-school effects

sweet demos, thanks for the mention :D
by Chris
Sat May 18, 2013 11:24 am
Forum: Hardware
Topic: Part suppliers
Replies: 13
Views: 89082

Re: Part suppliers

No problem I just got back from a 3 day conference in London myself. That is a very interesting website, far to much math for me :D I prefer my top down/side scrolling shooters and platform games. a true child of the 70/80's :lol: I think i see the pins you refer to, VMREQ and VMBG. I have a 123 pag...
by Chris
Fri May 17, 2013 10:34 pm
Forum: Hardware
Topic: Part suppliers
Replies: 13
Views: 89082

Re: Part suppliers

Great. :) Are you making progress with the V9990? I like it pretty much but it has it's disadvantages... Lately I am still a bit lazy but read about programming gfx effects. I wonder how much use one can get by using the blitter. It is very fast but not that advanced as the Amiga blitter. BTW my ad...
by Chris
Tue May 07, 2013 8:56 am
Forum: Hardware
Topic: Part suppliers
Replies: 13
Views: 89082

Re: Part suppliers

simon wrote:That is a good price. How long did it take to get them?

Regards
Simon


A little over 3 weeks, they mail you an image of the chip before shipping, maybe so you can be sure its the correct chip.

Regards

Chris
by Chris
Thu May 02, 2013 10:47 am
Forum: Hardware
Topic: Part suppliers
Replies: 13
Views: 89082

Re: Part suppliers

Just to confirm the UTSource part is the yamaha V9990 and total cost including shipping to the UK was $24.

regards

Chris
by Chris
Thu May 02, 2013 10:43 am
Forum: Hardware
Topic: Updated UART
Replies: 6
Views: 43915

Re: Updated UART

The baud rates seem to be the same although the spec sheet states 22 rates I can only find the same as the 68681, i think they are interpreting the original spec of the 68681 differently It has a few extra modes such as recieve timeouts and powerdown. Other than that is is pretty much the same, timi...
by Chris
Tue Apr 30, 2013 8:02 pm
Forum: Hardware
Topic: Updated UART
Replies: 6
Views: 43915

Updated UART

Hi,

While trying to source the needed parts I found a modern drop in replacement for the MC68681 UART. Its the NXP-SCC68692.
Seems to be generally available from digikey and farnell (p/n 1294827) for around 6 GBP.

Regards

Chris

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