Quazar SID Interface

SID Programming

https://www.c64-wiki.com/wiki/SID

Memory Addresses of the SID

Reg	Function
0	frequency voice 1 low byte
1	frequency voice 1 high byte
2	pulse wave duty cycle voice 1 low byte
	7..4				3..0
3	—				pulse wave duty cycle voice 1 high byte
4	control register voice 1
	7	6	5	4	3	2	1	0
	noise	pulse	sawtooth	triangle	test	ring modulation with voice 3	synchronize with voice 3	gate
	7..4				3..0
5	attack duration				decay duration voice 1
6	sustain level				release duration
7	frequency voice 2 low byte
8	frequency voice 2 high byte
9	pulse wave duty cycle voice 2 low byte
	7..4				3..0
10	—				pulse wave duty cycle voice 2 high byte
11	control register voice 2
	7	6	5	4	3	2	1	0
	noise	pulse	sawtooth	triangle	test	ring modulation with voice 1	synchronize with voice 1	gate
	7..4				3..0
12	attack duration				decay duration voice 2
13	sustain level				release duration voice 2
14	frequency voice 3 low byte
15	frequency voice 3 high byte
16	pulse wave duty cycle voice 3 low byte
	7..4				3..0
17	—				pulse wave duty cycle voice 3 high byte
18	control register voice 3
	7	6	5	4	3	2	1	0
	noise	pulse	sawtooth	triangle	test	ring modulation with voice 2	synchronize with voice 2	gate
	7..4				3..0
19	attack duration				decay duration voice 3
20	sustain level				release duration voice 3
21	—					filter cutoff frequency low byte
22	filter cutoff frequency high byte
23	filter resonance and routing
	7..4				3	2	1	0
	filter resonance				external input	voice 3	voice 2	voice 1
24	filter mode and main volume control
	7	6	5	4	3..0
	mute voice 3	high pass	band pass	low pass	main volume
25	paddle x value (read only)
26	paddle y value (read only)
27	oscillator voice 3 (read only)
28	envelope voice 3 (read only)

Using with RC2014 Mini II Picasso

Basic

Set ROM address to 0 100 (just Bank 2 set) to boot into Microsoft BASIC (Phil Green).

Insert SID interface card: marked A15 pin is pin 1.

Use the following test BASIC program (as provided in the instructions):

10 DATA 205,7,10,123,66,14,84,237,121
20 DATA 0,0,0,203,248,237,121,195,125,17
30 FOR A=-1024 TO -1006
40 READ D
50 POKE A,D
60 NEXT A
70 POKE -32695,0
80 POKE -32694,252
90 LET A=USR(1024)
100 LET A=USR(6159)
101 LET A=USR(1280)
102 LET A=USR(1776)
103 LET A=USR(1041)
110 FOR D=256 TO 511
120 LET A=USR(D)
130 NEXT D
140 GOTO 110

Type RUN to start it. You should hear "siren" audio effect.

CamelForth

Set ROM address to 0 001 (just Bank 8 set) to boot into CamelForth (Justin Skists).

Paste following Forth program.

: PC2! SWAP >< OR PC! ; 
: SIDSEND 2DUP 128 OR 84 PC2! 2DUP 127 AND 84 PC2! 128 OR 84 PC2! ;
: SIDRST 0 24 SIDSEND 0 4 SIDSEND ;
: SIDTEST 15 24 SIDSEND  10 0 DO 255 0 DO I 1 SIDSEND LOOP LOOP 0 24 SIDSEND ;

SIDRST 
15 24 SIDSEND 
0 5 SIDSEND 
240 6 SIDSEND 
17 4 SIDSEND 
SIDTEST

PS2!     c c p-addr --   Data byte (A), high address byte (B), port address (C) - OUT to port with A and B registers set
SIDSEND  c c --          Data value, register (0-31); bits 5,6 are for interrupt settings; bit 7 (/CS) is handled
SIDRST   --              Reset SID chip

Decimals used:

84 = 0x52 - I/O port number
24 = 0x18 register 0x18 (24), no interrupt
128 - high bit set
127 - all but high bit set