RMT: tripple hit and archive

[samurai]

Hi guys.

 

Voting in 6502 compo is over i think, so i am publishing my entries to it.

 

They are covers from amiga mods:

- thermostat7

- gary&denise

- deluxe dream

 

you can find them in tripple_hit.zip

 

Also you can find all of my RMT productions in tatqoo_all.zip (ASMA warriors go get it ).

 

Gretz

tripple_hit.zip

tatqoo_all.zip

[MaPa]

Ups, so why I ripped that 6502 compos music too? What a waste of my time!!!

[Heaven/TQA]

samurai...i would use some of your tunes for intros in the future? can you send me the RMTs? merci!

 

btw. any routine available to detect stereo ataris?

[analmux]

detecting stereo??...simple:

 

I assume the 2nd pokey is mapped at $D280-$D2FF:

 

Just disable the random generator on one of the pokeys and enable it on the other (some bit in IRQEN I think).

 

Then peek at RANDOM ($D20a) in both pokeys for several times. The register that's constant isn't generating random numbers and if $D28a is not constant, then you obviously have two pokeys.

[Heaven/TQA]

ehm...i am not good in hardware low-level stuff... can someone post just the routine so i can paste it in xasm?

[analmux]

ehm...i am not good in hardware low-level stuff... can someone post just the routine so i can paste it in xasm?

 

What a lame excuse

 

Come on, you're a coder, it's not that hard.

 

It's something like this:

 

mva #DISABLE irqen

mva #ENABLE irqen+128

ldx #16

_loop

lda random

eor random

bne _exit

dex

bne _loop

lda #2 (means 2 pokeys)

bne _end

_exit

lda #1 (means 1 pokey)

_end

rts

 

where #ENABLE is the bit-combination to turn on the random generator, and #DISABLE is for turning it off.

 

However I'm not sure if it's irqen you need to write to.

[analmux]

Explanation:

 

if you have 1 pokey then:

 

random is turned off first, and then random is re-enabled (by mva #ENABLE irqen+128), but that's mirrored to the same register of the only one pokey. That means: random number register will change every cycle.

 

Then: with lda #random --> eor #random we look whether the random register is still the same after a few cyles. If it is (for 16 times) then it's a very unlikely coincidence (16 times the same value is polled) or you have a second pokey. But the loop will detect changing values so it will directly go to _exit to return a value of 1 in acc.

 

 

if you have 2 pokeys then:

 

random in first pokey is disabled, and in second pokey is enabled, so we expect a constant value in random (and a not constant value in random+128).

 

Then the checking loop will (hopefully) detect always the same value in random so there are two pokeys: the loop will continue returning 2 in acc.

[Jaskier]

April the 1st

 

You cannot freeze random generator.

 

But I suppose it is possible to check the stereo by using the irq:

sei

mvx #1 $d20e

dex

stx $d21e

stx $d208



loop lda $d21e

lsr @

bcc mono

inx

bne loop



stereo equ *



mono equ *

Untested (it's 3:51AM).

[Bryan]

April the 1st    

 

You cannot freeze random generator.

 

Yes you can. Write 0's to bits 0 and 1 of SKCTL. RANDOM will then read $FF.

 

-Bry

[Heaven/TQA]

this IS low-levelstuff... i never wrote things like that:

 

f.e. ram-test routine, track-loaders, own custom OS etc... i have to admit...