Bit(s) Meaning
0-4 Dump format
5 Tube expansion card enabled
6,7 Tube expansion podule
Post RISC OS 3.50, bits 5-7 change their meaning:
7 Quality bit (do interpolation to maximise quality)
5,6 16-Bit sound control, on VIDC20 machines including Risc PC.
0 no 16-bit sound output, use standard mu-law (default)
1 DAC clock is slave: 11.2896MHz ext clock: standard VIDC20 rates or 44.1 KHz × 4/(4..45) can be used (as on ESP sound card).
2 DAC clock is slave: no ext clock: standard VIDC20 rates only
3 DAC clock is master: ext clock must be used for 16-bit sound (suitable sound clock driver must be installed)
Dump format
Bit(s) Meaning
0,1 Invalid character format
2 Treat top bit characters as valid
3 AND characters with &7F in *Dump
4 Tabs expand to 8 spaces
Invalid character codes
Value Meaning for invalid characters
0 GSTrans format
1 Dots
2 Decimal in <>'s
3 Hexadecimal in <>'s
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