since it's a tracker targeting zx-spectrum beeper that generates asm files as well, it seems not hard to replace that beeper (port 0xFE, bit 4?) with keyclick ( ppi 8255, port 0xAA, bit 7?) on msx?
since it's a tracker targeting zx-spectrum beeper that generates asm files as well, it seems not hard to replace that beeper (port 0xFE, bit 4?) with keyclick ( ppi 8255, port 0xAA, bit 7?) on msx?
did anyone try it?
Yes. I did that one day I was bored. It works. Basically what you say, If I remember well.
Edit: I found the file. It was on the old version of my web, and the download was not available. I uploaded the file to the new site. Still have to make the entry for it, but until now, here are the files (a .BAS and a .BIN)
I've been thinking of a dedicated sound cartridge for msx that does 1bit beeper sound, so I designed it and tested just now and it works! (Used the 1bit.bas/bin above), I used a pc beeper and it was louder than I thought so I had to turn it off straight away, as its midnight here. I have to continue tomorrow.
So, is 1bit.bas playing the 1bit.bin which is already patched for 0xaa? Was the original song data made for 0xfe using Beepola, and is there a converter? I want to try different songs/tracks.
Currently, I'm address decoding for 0xaa so that a key click music can be played, but may be I should change that as I have my own beeper making the sound and dont need the key click.
The beeper (the piezo speaker thing) was too annoying so I changed the design to a external sound output from the cartridge. I've been adding another output, not sound but a sync signal. MSX can now be a master clock to sync other devices now like pocket operator, korg volca etc. And this works nicely.
Is there any tracks that use beeper (key click port) and psg? I want to test my device.
Also, need to find a music player routine that could be modified to include the clock sync output.
Yes it's still on the breadboard, but it will be a cartridge. It currently address decodes the key clicks (so 0xaa and 0xab), so it will be compatible with existing msx 1bit key click players. (Unless I should move that to different address. A reason might be because it will also still play the original msx key clicks that gets mixed with psg etc, but I think that can be switched off in bios. I must test that.) The clicks can be direct from the decoder chip but I've added a transistor (allows testing different ones for sound quality), and is line level converted to line out 3.5mm. It also has a separate volca/pocket operator compatible sync output as well so if a player program sends out the sync pattern, the bpm will be in sync with other external sequencers/synths.
