New 1bit PWM music engine for the CoCo and Dragon

[zephyr]

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.

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.

[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

[zephyr]

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.

is the irq vector at $10c like the coco ?

Yes. The secondary interrupt vectors are exactly the same as the CoCo 1/2.

[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.

[zephyr]

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.

[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

[zephyr]

Nice one! The cas and wav files are attached.