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![goattracker dual sid goattracker dual sid](https://ep1.pinkbike.org/p4pb17391916/p4pb17391916.jpg)
this is where we will insert our visualization routine! lda $c400,x pointer to our RAM temp space ldx #$0 let's restore the 24 SID registers Lda $c400,x pointer to our RAM temp space Ldx #$18 let's restore the 24 SID registers Sta $c400,x temp space in RAM, nothing here Lda $d400,x pointer to the RAM area hidden by the SID registers "normally" Ldx #$18 let's copy the 24 SID registers somewhere Also: what is in general very different between both. You'd have to limit yourself to only use features from 'LIGHT' oder even ' (BARE)' mode to make lossless conversion possible. Lda $dd0d read interrupt control register 2 in a SID-Wizard is highly aimed at musical flexibility giving the musician as many features as possible while GoatTrackers focus is optimizied RAM and raster time usage. Lda $dc0d read interrupt control register 1 in a Sty $d012 set Raster line to generate interrupt at raster line 126 Stx $0315 set Execution address+1 of interrupt service routine to high byte irq address Sta $0314 set Execution address of interrupt service routine to low byte irq address Sty $d018 Set memory setup register to charmem at 1000-$17FF and screen ram to $0400-$07FF Stx $d016 Screen control register #2 = x => 40 columns mode Sta $d011 Screen control register #1 = a => in text mode Sta $d01a set Interrupt control register to enable raster interrupts only Sta $dd0d Set Interrupt control to enable all timers interrupts Sta $dc0d Set Interrupt control to enable all timers interrupts Now I will take a look at Scorpion's visualizer, thanks for the link 4mat! Looks like they are using the GoatTracker routine (said sidid) It works! But as 4mat predicted (even if quite recent), only when writing backwards! I was also wondering if some players where doing multiple writes on a given register per call (as it could be with the YM2149 to achieve special effects). To play the sound you need to disable the ram again (lda #$35 sta $01 for the above) and then write the saved values to the sid manually. Will write the sid values to $c400, you won't hear it yet because they're not going to the chip.
#Goattracker dual sid driver#
Jsr driver_update Whatever driver you're using If you want to do that as the basis for translating them to visuals, something like: This won't give you direct oscillator values like the above though, just the sid control values for that frame. You can read the other sid registers by swapping the Vic block out with ram so when the driver gets called it'll write it to ram instead of the sid. $d41c does the same thing for that channel's envelope generator. ($d41b) This gives the top 8-bits of that channel's output and is labelled 'random number generator' in the manual. The sid chip does have an oscillator read register, but only for channel 3.
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