Skip to main content

Quazar SID Interface

SID Programming

1000013963.png

Using with RC2014 Mini II Picasso

rc2014-sid-picasso.jpg

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 2* 2* 2* 2* 2* 2* 2* 2* OR PC! ; 
: SIDSEND 2DUP 128 OR 84 PC2! 2DUP 127 AND 84 PC2! 128 OR 84 PC2! ;
: SIDRST 0 24 SIDSEND 0 4 SIDSEND ;

SIDRST 
15 24 SIDSEND 
0 5 SIDSEND 
240 6 SIDSEND 
17 4 SIDSEND 
128 1 SIDSEND 
PS2!     c c p-addr --   Data byte, high address byte, port address; OUT to port with A and B register set
SIDSEND  c c --          Value, register (0-31); bit 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
Back to top