french_touch, 26 days ago During the development of Digidream 2, we found some "strange" issues with the AY-3-8913 soundchip. More info here: https://fenarinarsa.com/?p=3183 by @fenarinarsa #demoscene #appleii #chiptune
During the development of Digidream 2, we found some "strange" issues with the AY-3-8913 soundchip.
More info here: https://fenarinarsa.com/?p=3183
by @fenarinarsa
#demoscene #appleii #chiptune
xot, 23 days ago @french_touch @fenarinarsa You wondered about the AY's /RESET being connected to a diode. This stops the 6522 from resetting the entire computer when it resets the AY.
@french_touch @fenarinarsa You wondered about the AY's /RESET being connected to a diode. This stops the 6522 from resetting the entire computer when it resets the AY.
fenarinarsa, 23 days ago @xot @french_touch XD okay thanks I wondered why there wasn’t a diode on every implementation like the Z80 based computers don’t have it.
@xot @french_touch XD okay thanks I wondered why there wasn’t a diode on every implementation like the Z80 based computers don’t have it.
gunstick, 24 days ago @french_touch @fenarinarsa you happen to know how this YM vs AY detection works?
@french_touch @fenarinarsa you happen to know how this YM vs AY detection works?
fenarinarsa, 24 days ago @gunstick @french_touch This article explains the software method. Basically you write a register with unused bits and read it back. http://blog.tynemouthsoftware.co.uk/2023/01/testing-ay-3-8910-ym2149-sound-card-for-rc2014-and-minstrel-4D.html
@gunstick @french_touch This article explains the software method. Basically you write a register with unused bits and read it back. http://blog.tynemouthsoftware.co.uk/2023/01/testing-ay-3-8910-ym2149-sound-card-for-rc2014-and-minstrel-4D.html
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