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Index of OS_Bytes


Number Description Page
&00 Display OS version information OS_Byte 0
&02 Specify input stream OS_Byte 2
&03 Specify output streams OS_Byte 3
&04 Cursor key status OS_Byte 4
&05 Write printer driver type OS_Byte 5
&06 Write printer ignore character OS_Byte 6
&07 Write RS423 receive rate OS_Byte 7, OS_Byte 7 and 8 (5a)
&08 Write RS423 transmit rate OS_Byte 8, OS_Byte 7 and 8 (5a)
&09 Write duration of first colour OS_Byte 9
&0A Write duration of second colour OS_Byte 10
&0B Write keyboard auto-repeat delay OS_Byte 11
&0C Write keyboard auto-repeat rate OS_Byte 12
&0D Disable event OS_Byte 13
&0E Enable event OS_Byte 14
&0F Flush buffer OS_Byte 15
&10 Store the number of channels to be sampled OS_Byte 16 (5a)
&11 Return to the caller, doing nothing OS_Byte 17 (5a)
&12 Reset function keys OS_Byte 18
&13 Wait for vertical sync (vsync) OS_Byte 19
&14 Reset font definitions OS_Byte 20
&15 Flush selected buffer OS_Byte 21
&19 Reset group of font definitions OS_Byte 25
&46 Read/write country number OS_Byte 70
&47 Read/write alphabet or keyboard OS_Byte 71
&6A Select pointer / activate mouse OS_Byte 106
&70 Write VDU driver screen bank OS_Byte 112
&71 Write display hardware screen bank OS_Byte 113
&72 Write shadow/non-shadow state OS_Byte 114
&75 Read VDU status OS_Byte 117
&76 Reflect keyboard status in LEDs OS_Byte 118
&79 Keyboard scan OS_Byte 121
&7A Keyboard scan from 16 decimal OS_Byte 122
&7C Clear escape condition OS_Byte 124
&7D Set escape condition OS_Byte 125
&7E Acknowledge escape condition OS_Byte 126
&7F Check for end of file OS_Byte 127
&80 Get buffer/mouse status OS_Byte 128
nbsp Return switch state and last channel converted OS_Byte 128, 0-4 (5a)
&81 Scan a for a particular key OS_Byte 129, OS_Byte 129 (5a)
&86 Read text cursor position OS_Byte 134
&87 Read character at text cursor and screen mode OS_Byte 135, OS_Byte 135 (5a)
&8A Insert character code into buffer OS_Byte 138
&8B Write filing system options OS_Byte 139
&8F Issue module service call OS_Byte 143
&90 Set vertical screen shift and interlace OS_Byte 144
&91 Get character from buffer OS_Byte 145
&98 Examine buffer status OS_Byte 152
&99 Insert character into buffer OS_Byte 153
&9C Read/write asynchronous communications state OS_Byte 156
&A0 Read VDU variable value OS_Byte 160
&A1 Read battery backed RAM OS_Byte 161
&A2 Write battery backed RAM OS_Byte 162
&A3 Read/write general graphics information OS_Byte 163
&A5 Read output cursor position OS_Byte 165
&B0 50Hz counter OS_Byte 176
&B1 Read input source OS_Byte 177
&B5 Read/write RS423 input interpretation status OS_Byte 181
&B6 Read/write NoIgnore state OS_Byte 182
&BC Read the current channel OS_Byte 188 (5a)
&BD Read the number of channels to be sampled OS_Byte 189 (5a)
&BE Read the resolution of conversion OS_Byte 190 (5a)
&BF Read/write RS423 busy flag OS_Byte 191
&C0 Read RS423 control byte OS_Byte 192
&C1 Read/write flash counter OS_Byte 193
&C2 Read duration of second colour OS_Byte 194
&C3 Read duration of first colour OS_Byte 195
&C4 Read/write keyboard auto-repeat delay OS_Byte 196
&C5 Read/write keyboard auto-repeat rate OS_Byte 197
&C6 Read/write *Exec file handle OS_Byte 198
&C7 Read/write *Spool file handle OS_Byte 199
&C8 Read/write Break and Escape effect OS_Byte 200
&C9 Read/write keyboard disable flag OS_Byte 201
&CA Read/write keyboard status byte OS_Byte 202
&CB Read/write RS423 input buffer minimum space OS_Byte 203
&CC Read/write RS423 ignore flag OS_Byte 204
&D3 Read/write bell channel OS_Byte 211
&D4 Read/write bell sound volume OS_Byte 212
&D5 Read/write bell frequency OS_Byte 213
&D6 Read/write bell duration OS_Byte 214
&D8 Read/write length of function key string OS_Byte 216
&D9 Read/write paged mode line count OS_Byte 217
&DA Read/write bytes in VDU queue OS_Byte 218
&DB Read/write Tab key code OS_Byte 219
&DC Read/write escape character OS_Byte 220
&DD Read/write interpretation of input values &C0 - &CF OS_Bytes 221 - 228
&DE Read/write interpretation of input values &D0 - &DF OS_Bytes 221 - 228
&DF Read/write interpretation of input values &E0 - &EF OS_Bytes 221 - 228
&E0 Read/write interpretation of input values &F0 - &FF OS_Bytes 221 - 228
&E1 Read/write function key interpretation OS_Bytes 221 - 228
&E2 Read/write Shift function key interpretation OS_Bytes 221 - 228
&E3 Read/write Ctrl function key interpretation OS_Bytes 221 - 228
&E4 Read/write Ctrl Shift function key interpretation OS_Bytes 221 - 228
&E5 Read/write Escape key status OS_Byte 229
&E6 Read/write escape effects OS_Byte 230
&EC Read/write character destination status OS_Byte 236
&ED Read/write cursor key status OS_Byte 237
&EE Read/write numeric keypad interpretation OS_Byte 238
&F0 Read country flag OS_Byte 240
&F2 Read RS423 baud rates OS_Byte 242
&F3 Read timer switch state OS_Byte 243
&F5 Read printer driver type OS_Byte 245
&F6 Read/write printer ignore character OS_Byte 246
&F7 Read/write Break key actions OS_Byte 247
&FA Read VDU driver screen bank number OS_Byte 250
&FB Read display screen bank number OS_Byte 251
&FD Read last break type OS_Byte 253, OS_Byte 253 (5a)
&FE Set effect of Shift Ctrl on numeric keypad OS_Byte 254
&FF Read/write boot option OS_Byte 255

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Last update 29/10/15