Search found 49 matches
- Sat Sep 26, 2015 3:00 pm
- Forum: Sound
- Topic: New Documentation: An authoritative reference on the YM2612
- Replies: 865
- Views: 2141505
Re: New Documentation: An authoritative reference on the YM2612
Okay, I got Test Register $2C! $2C:7 - Selects whether the TEST pin is an output or input. (Presumably 0 = output, 1 = input, since power-up state is output.) $2C:6 - Goes to the same unit as the TEST pin's input wire, which is a small control unit at the upper right of the EG. I will try to figure ...
- Tue Sep 22, 2015 2:03 pm
- Forum: Sound
- Topic: New Documentation: An authoritative reference on the YM2612
- Replies: 865
- Views: 2141505
Re: New Documentation: An authoritative reference on the YM2612
More info! http://i.imgur.com/yt0p3IV.jpg http://i.imgur.com/J5lfNGM.jpg This is, as I had expected, the address decoder table of the YM2612. Note that bits 0, 1, and A1 from the bus (they're in order 0-7 then A1) go directly to the control unit on the left; bits 2 and 3 go to the control unit as we...
- Mon Sep 21, 2015 2:28 pm
- Forum: Sound
- Topic: New Documentation: An authoritative reference on the YM2612
- Replies: 865
- Views: 2141505
Re: New Documentation: An authoritative reference on the YM2612
Note that the YM2608 uses that register range (and $10-$1F as well). The YM2612 is pretty much the YM2608 with a lot of features removed (and the DAC slapped in). I started working on the die shot of the YM2203, since it's clearer and easier to read than the one of the YM2612. I'm not quite done wi...
- Sat Sep 19, 2015 10:19 pm
- Forum: Sound
- Topic: New Documentation: An authoritative reference on the YM2612
- Replies: 865
- Views: 2141505
Re: New Documentation: An authoritative reference on the YM2612
Hi everyone, this is Sauraen from the MIDIbox forums . I'm the one who made MIDIbox FM V2.1 / V2.0 , and the 32-bit OPL3 driver for MIOS32 (the MIDIbox operating system). I'm now working on MIDIbox Quad Genesis , a similar synth with four YM2612s and four SN76489/SN76494/SN76496es. But that is a top...