|
Thx Yaqube!
I know limitation of the OCS - so change of VHPOSW must be done by CPU but CPU can service interrupt routine then i assume that this should be possible with minimal CPU overhead.
And next question (wrong thread but...) how frequently can be changed ColorXX register in OCS? (ie external writing - data injected by external circuit)
And next question related to the sound.
There is possibility to modulate AUDxVOL by another channel - but there is only possible to use words's not byte's - so we loss half sample periods and we use only 6 from 16 bites.
But can with short video line (even shorter than half), with proper data processing - small buffer, lower half of 16 bit expanded twice - ie oversampled by 2 with for example simple dither - like LFSR low 2 bit pseudo noise dither so dither is 2x faster than our audio data, upper half used 6 bit from 8 then extended to the 16 and placed in second buffer, then buffers played with 2 channels with enabled modulation so system meet Nyquist criteria (lower half is oversampled and dithered) - only problem with usability of graphics (but 160 - 240 pixels in hires should be available).
So theoretically speaking can we meet almost hardware >14bit with something over usable >32 ksps?
Sorry for strange questions but...
TIA
BR
|