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Re: New 1bit PWM music engine for the CoCo and Dragon
Posted: Wed Dec 11, 2013 10:54 pm
by zephyr
simon wrote:
so now i have come up with a couple of VU meters incorporated into the routine..... (these use text mode block gfx)....
i have no idea if the "normal" screen on a dragon starts at $400 ???? - my coco II (no dos) does, so the meters are plotted at $420 / $460..... change the addresses to suit
I like the VU meter idea.
Thanks, Simon.
simon wrote:
i have no idea if the "normal" screen on a dragon starts at $400 ????
The basic Dragon 32/64 memory map is exactly the same as the 64K CoCo 1 and 2.
Re: New 1bit PWM music engine for the CoCo and Dragon
Posted: Thu Dec 12, 2013 6:36 pm
by simon
Cheers Steve....
glad u like the "VU" meters... proves that the routine can do more than play music....
how about DOS ? are there any areas of memory that are dodgy or a big "no no" ???
(i'm thinking DEMO here)..... hows about SG24 support ?
is the irq vector at $10c like the coco ?
/Simon
Re: New 1bit PWM music engine for the CoCo and Dragon
Posted: Thu Dec 12, 2013 10:56 pm
by zephyr
simon wrote:
how about DOS ? are there any areas of memory that are dodgy or a big "no no" ???
DragonDOS/SuperDOS uses memory from $00EA to $00F8, and from $0600 to $0BFF.
simon wrote:
is the irq vector at $10c like the coco ?
Yes. The secondary interrupt vectors are exactly the same as the CoCo 1/2.
Re: New 1bit PWM music engine for the CoCo and Dragon
Posted: Fri Dec 13, 2013 12:31 am
by Alastair
Re. memory areas, Graham E. Kinns collected a lot of information which is available at
his site.
Detailed Memory Map,
Dragon DOS Information, and possibly
Dragon 64 Differences are most likely to be of interest to you.
Re: New 1bit PWM music engine for the CoCo and Dragon
Posted: Sat Dec 14, 2013 4:21 pm
by zephyr
simon wrote:
had a bit of a piddle about this afternoon (talked with Sock Master last night about an idea)....
so now i have come up with a couple of VU meters incorporated into the routine.....
I have made the following changes to the VU meter routine:
(1) Did some minor size/speed optimization.
(2) Added some colour to the VU display.
Re: New 1bit PWM music engine for the CoCo and Dragon
Posted: Sat Dec 14, 2013 8:17 pm
by simon
Did u one better m8 !
just changed the VU routine so it shows green/yellow/red for each channel...
sources for jarre/formx included....
/Simon
Re: New 1bit PWM music engine for the CoCo and Dragon
Posted: Sat Dec 14, 2013 11:25 pm
by zephyr
Nice one!
The cas and wav files are attached.