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I was wondering what's the fastest method to convert 8 pixels colors to the planar format we need for the SMS.
I mean, source can be 8 bytes, 4 bytes, whatever actually, but output should be the 4 bytes we need to push to VRAM.
Anyone? :)

I did this but can't find the code. Not sure if this is the fastest but from memory i did something like this.

- ld a, (hl), inc hl... running over input.
- shift values in to b, c, d, e
- when bcde are full write them to ram using stack.

Use outd to compensate for reverse order.

Was something like that.

oh, I see the point. thanks for the directions! :)

psidum wrote

I did this but can't find the code. Not sure if this is the fastest but from memory i did something like this.

- ld a, (hl), inc hl... running over input.
- shift values in to b, c, d, e
- when bcde are full write them to ram using stack.

Use outd to compensate for reverse order.

Was something like that.

I suppose you are talking about this post? :)
http://www.smspower.org/forums/15469-ChunkyToPlanarOnSMS

Author	Message
sverx Joined: 05 Sep 2013 Posts: 3827 Location: Stockholm, Sweden	Fast conversion to planar format, anyone? Posted: Thu Jun 01, 2017 11:47 am
	I was wondering what's the fastest method to convert 8 pixels colors to the planar format we need for the SMS. I mean, source can be 8 bytes, 4 bytes, whatever actually, but output should be the 4 bytes we need to push to VRAM. Anyone? :)

psidum Joined: 01 Jan 2014 Posts: 331	Posted: Thu Jun 01, 2017 2:21 pm
psidum Joined: 01 Jan 2014 Posts: 331	I did this but can't find the code. Not sure if this is the fastest but from memory i did something like this. - ld a, (hl), inc hl... running over input. - shift values in to b, c, d, e - when bcde are full write them to ram using stack. Use outd to compensate for reverse order. Was something like that.

sverx Joined: 05 Sep 2013 Posts: 3827 Location: Stockholm, Sweden	Posted: Thu Jun 01, 2017 2:49 pm
	oh, I see the point. thanks for the directions! :)

Calindro Joined: 14 Apr 2013 Posts: 624	Posted: Thu Jun 01, 2017 2:59 pm
Calindro Joined: 14 Apr 2013 Posts: 624	psidum wrote I did this but can't find the code. Not sure if this is the fastest but from memory i did something like this. - ld a, (hl), inc hl... running over input. - shift values in to b, c, d, e - when bcde are full write them to ram using stack. Use outd to compensate for reverse order. Was something like that. I suppose you are talking about this post? :) http://www.smspower.org/forums/15469-ChunkyToPlanarOnSMS

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