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- VDUobject 1.01
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- VDU interpretation:
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- VDU 0 : Normal
- VDU 1 : Ignore and ignore next byte
- VDU 2 : Ignored
- VDU 3 : Ignored
- VDU 4 : Normal but ignore any printable character that follows
- VDU 5 : Only the standard direction of printing is supported. So
- positive X is to the right and positive Y is downwards
- VDU 6 : Ignored
- VDU 7 : Ignored
- VDU 8 : If in VDU 5 mode treated as a backspace else ignored
- VDU 9 : If in VDU 5 mode treated as a space else ignored
- VDU 10 : If in VDU 5 mode treated as a linefeed else ignored
- VDU 11 : If in VDU 5 mode treated as a linefeed up else ignored
- VDU 12 : Normal
- VDU 13 : If in VDU 5 mode treated as a carriage return else ignored
- VDU 14 : Ignored
- VDU 15 : Ignored
- VDU 16 : Normal
- VDU 17 : Normal
- VDU 18 : Action=action AND NOT %1111. So only the overwrite mode is
- possible.
- VDU 19 : Only mode 0-15 and 16 are used other modes are ignored.
- VDU 20 : Normal
- VDU 21 : Ignored
- VDU 22 : Normal
- VDU 23,0 : Ignored and ignore next 8 bytes
- VDU 23,1 : Ignored and ignore next 8 bytes
- VDU 23,2-5 : Normal
- VDU 23,6 : Only the first parameter is significant.
- VDU 23,7-8 : Ignored and ignore next 8 bytes
- VDU 23,9-10 : Ignored and ignore next 8 bytes
- VDU 23,11 : Normal
- VDU 23,12-15 : Normal
- VDU 23,16 : Ignored and ignore next 8 bytes
- VDU 23,17,0-3: Normal
- VDU 23,17,4 : Normal
- VDU 23,17,5 : Normal
- VDU 23,17,6 : Ignored and ignore next 7 bytes
- VDU 23,17,7 : Normal
- VDU 23,18-24 : Ignored and ignore next 8 bytes
- VDU 23,25-26 : Ignored and ignore next 8 bytes
- VDU 23,27 : Ignored and ignore next 8 bytes
- VDU 23,28-31 : Ignored and ignore next 8 bytes
- VDU 23,32-255: Ignored and ignore next 8 bytes
- VDU 24 : Normal
- VDU 25 : Type AND 7 : Normal
- Type AND NOT 7 :
- 0 : Solid line
- 8 : Solid line
- 16 : Dotted line
- 24 : Dotted line
- 32 : Solid line
- 40 : Solid line
- 48 : Dotted line
- 56 : Dotted line
- 64 : Rectangle fill (point size)
- 72 : Ignored
- 80 : Normal
- 88 : Ignored
- 96 : Normal
- 104 : Ignored
- 112 : Normal
- 120 : Ignored
- 128 : Ignored
- 136 : Ignored
- 144 : Normal
- 152 : Normal
- 160 : Normal
- 168 : Normal
- 176 : Normal
- 184 : Ignored
- 192 : Normal
- 200 : Normal
- 208 : Ignored
- 216 : Ignored
- 224 : Ignored
- 232 : Ignored
- 240 : Ignored
- 248 : Ignored
- VDU 26 : Normal
- VDU 27 : Normal
- VDU 28 : Ignored and ignore the next 4 bytes
- VDU 29 : Normal
- VDU 30 : Normal but ignored in VDU 4 mode
- VDU 31 : Normal but ignored in VDU 4 mode
- VDU 32-255 : Normal but ignored in VDU 4 mode
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