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...
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...
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...
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...
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...
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.