Ragstaff wrote:Something that is already done - the expansion slot exxoss and rpineau are building into their accelerators.
rpineau wrote:As for video card I started working on one for our 68020 booster that will use the Epson S1D13506. it has its own DRAM (one external chip) and can do 800x600 in 16 bits. The component is 16 bit so can be adapted to VME bus, 68000 expansion or 68020/030 expansion bus ... but we need drivers (fVDI ?).
rpineau wrote:But it's fairly limiting for machine that have faster CPU and can use 32 bits data bus and faster clock.
rpineau wrote:Latest fvdi source update was r483 from Johan in svn.
The github page is also not showing much update (https://github.com/jklockars/fVDI_from_ ... aster/fvdi ). latest log is from "Thu Jan 24 11:46:17 2013"
Vicent Riviere has a fork (https://github.com/vinriviere/fvdi ) which seem to have more recent changes he did for the Amiga stuff you mentioned.
So I guess Vincent's fork is the one we should look at for implementing new drivers.
Faucon2001 wrote:I don't have any hardware knowledge, and I am really impressed by the ingenious work you are all doing, but summing to Ragstaff comments, I wonder if there is another way to think hardware development. Let me explain what I mean based on the following:
1- we can't separate hardware and software.
2- most of the good Atari softwares are no longer developed
3- even though there are still developments, ressources are limited.
4- compatibility with old software is an issue difficult to solve.
So taking for example the video card expansion, why putting a new video chip which needs a specific driver to be developed and FVDI which is still incomplete and in standby, instead of an ET4000 which is managed directly by NVDI and compatible with many legacy softwares?
Wouldn't it be an better path? is it feasible or a stupid idea? Can't we reuse/improve solutions done in the past and which are known to work with legacy softwares?
joska wrote:Ideally one would create a shifter AND videl compatible graphics card using an FPGA. Then you would use NVDI (or just TOS) VDI simply by setting the video base address and fiddle with the LineA variables to get a larger screen resolution.
There is no advantage in using ET4000 except that the drivers already exists.
rpineau wrote:Thank for the update Vincent.
As for the ET4000, it's always hard to find one and they are going to become impossible to find, Add to this that not all are compatible depending on the DAC they use.
The new chip I'm looking at is not the most powerful thing in the video world, but has a direct 68000 and 68030 mode. So this makes a few things easier to do on the hardware side.
If we make a fVDI driver and make this card for our 68020 bus as well as VME, Mega Bus and internal Falcon bus, we can get more people to use it.
Unless someone offers to make a video card for all Atari (different version for whatever port is available) using a FPGA that would be great. So far, no one is making new video hardware for the Ataris except if you have a CT60/63 ...
Maeke wrote:besides designing a gfx specific for the atari line of computers would have another advantage, the needed space could be reduced. Making them easyer to fit in a st(m)/f(m)/e or a falcon.
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