Req. for speculation on Prop II's A/D & D/A ability w/res. to VGA
JRetSapDoog
Posts: 954
I'm just curious if anyone could speculate as to whether the proposed Prop II would likely·be capable of the following:
[noparse][[/noparse]1] Generating a 256-level (or so)·output on an output·pin in D/A mode fast enough such that 3 pins (not counting the 2 for sync) could generate the RGB signals of a VGA interface, the foregoing being done without the use of a counter/video scaler to generate such signals (even if this is not the most likely way to generate such signals)
[noparse][[/noparse]2] Turning that around, could a VGA signal be "captured" on 3 input·pins (not counting sync) fast enough to do some kind of subsequent processing (not with the intention of storing a whole frame, mind you, but rather with the idea of doing some kind of basically real-time processing), ignoring the demands of the specific processing
And while I'm at it, or in relation to this...
[noparse][[/noparse]3] Could anyone speculate as to the speed of A/D and D/A conversion in terms of clock speed?· For example, could D/A be done at 1X clock speed?· Or, if not, then 1/2X?· 1/10X?· 1/20X?· 1/50X?· And the same question for incoming signals in A/D mode.· Perhaps I'm not asking the question ideally, but stating the speeds in terms of clockspeed would seem·convenient for·understanding.· Perhaps·the·conversion-to-clock speed is·one-to-one, but that seems like too much to hope for (although most instructions will apparently operate in one cycle).
Apologies for the Prop II speculation, but the recent April Fool's joke got me thinking and I'm in a posting mood today.· Thanks.·
Post Edited (JRetSapDoog) : 4/9/2010 5:41:28 AM GMT
[noparse][[/noparse]1] Generating a 256-level (or so)·output on an output·pin in D/A mode fast enough such that 3 pins (not counting the 2 for sync) could generate the RGB signals of a VGA interface, the foregoing being done without the use of a counter/video scaler to generate such signals (even if this is not the most likely way to generate such signals)
[noparse][[/noparse]2] Turning that around, could a VGA signal be "captured" on 3 input·pins (not counting sync) fast enough to do some kind of subsequent processing (not with the intention of storing a whole frame, mind you, but rather with the idea of doing some kind of basically real-time processing), ignoring the demands of the specific processing
And while I'm at it, or in relation to this...
[noparse][[/noparse]3] Could anyone speculate as to the speed of A/D and D/A conversion in terms of clock speed?· For example, could D/A be done at 1X clock speed?· Or, if not, then 1/2X?· 1/10X?· 1/20X?· 1/50X?· And the same question for incoming signals in A/D mode.· Perhaps I'm not asking the question ideally, but stating the speeds in terms of clockspeed would seem·convenient for·understanding.· Perhaps·the·conversion-to-clock speed is·one-to-one, but that seems like too much to hope for (although most instructions will apparently operate in one cycle).
Apologies for the Prop II speculation, but the recent April Fool's joke got me thinking and I'm in a posting mood today.· Thanks.·
Post Edited (JRetSapDoog) : 4/9/2010 5:41:28 AM GMT