Back again...
Assembler? :lol: So far I've been assembling by hand...
Anyway, while I get a reasonable tool somewhere, I experimented with the register at $0802 -- just putting your code inside a loop that will try every single value for that register, stored in otherwise unused D3. For debugging purposes, I "placed" that byte on the screen so I can see what's going on. Here's what I flashed lastly on the Jolly Roger SIMM:
Now, the bad news 
None of the values played the sample cleanly, although the effect of some bits of this register became evident:
D0: disables sound (if set to "1")
D1: makes sound weaker (volume control?)
D3: makes sound even weaker (can be combined with D1 for further attenuation)
Not sure if any other bits had effect on the sound, but at least we know something more about the ASC :b&w:
There has to be some other obscure initialization pending...
Assembler? :lol: So far I've been assembling by hand...
Anyway, while I get a reasonable tool somewhere, I experimented with the register at $0802 -- just putting your code inside a loop that will try every single value for that register, stored in otherwise unused D3. For debugging purposes, I "placed" that byte on the screen so I can see what's going on. Here's what I flashed lastly on the Jolly Roger SIMM:
Code:
40000000 0000000040800008 ;SP-PC Reset
;disable interrupts... just in case
40000008 007C0700 ;MOVE #0x0700, SR
;put image at 0x40001000 on screen
4000000C 41F940001000 ;LEA Picture, A0
40000012 43F9FE008000 ;LEA VideoBuffer, A1
40000018 303C1560 ;MOVE.W #0x1560, D0
4000001C*1 2218 ;MOVE.L (A0)+, D1
4000001E 23418000 ;MOVE.L D1, (0x8000, A1)
40000022 22C1 ;MOVE.L D1, (A1)+
40000024 5340 ;SUBQ.W #1, D0
40000026 66F4 ;BNE.S *1
;loop for trying every 0x802 value!
7600 ;MOVEQ #0, D3 ;init value
*8 13C3FE001877 ;MOVE.B D3, BYTE ;show on screen
13C3FE009877 ;MOVE.B D3, BYTE2
17430802 ;MOVE.B D3, (0x802, A3) ;set reg
;dougg3's sampled sound code (at absolute address 0x40007000)
47F950F14000 ;LEA 0x50F14000, A3
41F940007000 ;LEA Sample, A0 [41FA-"rel16"]
177C00010801 ;MOVE.B #0x01, (0x801, A3)
422B0807 ;CLR.B (0x807, A3)
177C00400806 ;MOVE.B #0x40, (0x806, A3)
277CFE00FE000830 ;MOVE.L #0xFE00FE00, (0x830, A3)
277CFE00FE000834 ;MOVE.L #0xFE00FE00, (0x834, A3)
177C00800803 ;MOVE.B #0x80, (0x803, A3)
422B0803 ;CLR.B (0x803, A3)
4A2B0804 ;TST.B (0x804, A3)
2018 ;MOVE.L (A0)+, D0
2200 ;MOVE.L D0, D1
4841 ;SWAP D1
6014 ;BRA.S *5
*2 082B00010804 ;BTST #1, (0x804, A3) ;PSIC
6708 ;BEQ.S *4
*3 082B00000804 ;BTST #0, (0x804, A3) ;WHE
67F8 ;BEQ.S *3
*4 1418 ;MOVE.B (A0)+, D2 ;DS
1682 ;MOVE.B D2, (A3)
*5 51C8FFEA ;DBF D0, *2 ;NS
51C9FFE6 ;DBF D1, *2
*6 177C00010801 ;MOVE.B #0x01, (0x801, A3)
422B0807 ;CLR.B (0x807, A3)
177C00400806 ;MOVE.B #0x40, (0x806, A3)
277CFE00FE000830 ;MOVE.L #0xFE00FE00, (0x830, A3)
277CFE00FE000834 ;MOVE.L #0xFE00FE00, (0x834, A3)
177C00800803 ;MOVE.B #0x80, (0x803, A3)
422B0803 ;CLR.B (0x803, A3)
4A2B0804 ;TST.B (0x804, A3)
;loop's end
5203 ;ADDQ.B #1, D3 ;next value
6600FF60 ;BNE *8
;put a counter on the screen saying we're finished
*7 53B9FE001844 ;SUBQ.L #1, SITIO
53B9FE009844 ;SUBQ.L #1, SITIO2
60F2 ;BRA.S *7D0: disables sound (if set to "1")
D1: makes sound weaker (volume control?)
D3: makes sound even weaker (can be combined with D1 for further attenuation)
Not sure if any other bits had effect on the sound, but at least we know something more about the ASC :b&w:
There has to be some other obscure initialization pending...