OSBYTEs
From BeebWiki
- &00 0 OS Version Number Report
- &01 1 Read/Write User Flag
- &02 2 Specify Input Stream
- &03 3 Specify Output Stream(s)
- &04 4 Define action of cursor editing keys
- &05 5 Printer Driver Type
- &06 6 Printer Ignore Character
- &07 7 RS423 Baud Receive rate
- &08 8 RS423 Baud Transmit Rate
- &09 9 First Colour Duration
- &0A 0 Second Colour Duration
- &0B 11 Auto Repeat Delay
- &0C 12 Auto Repeat Period
- &0D 13 Disable Event
- &0E 14 Enable Event
- &0F 15 Flush all buffers/input buffer
- &10 16 Set maximum number of ADC chanel
- &11 17 Force an ADC conversion
- &12 18 Reset F-key definitions
- &13 19 Wait for Vertical Retrace
- &14 20 Explode user defined character font RAM
- &15 21 Flush Selected Buffer
- &16 22 Increment Polling Semaphore
- &17 23 Decrement Polling Semaphore
- &18 24 Select external sound system.
- &19 25 Reset a group of font definitions
- &1A 26
- &1B 27
- &1C 28
- &1D 29
- &1E 30
- &1F 31
- &20 32 Watford32K - Read top of memory
- &21 33 Watford32K - Read top of memory for mode
- &22 34 Watford32K - Read/Write RAM switch
- &23 35 Watford32K - Read workspace address
- &24 36 Watford32K - Read/Write RAM buffer bank
- &25 37
- &26 38
- &27 39
- &28 40
- &29 41
- &2A 42
- &2B 43
- &2C 44
- &2D 45
- &2E 46
- &2F 47
- &30 48
- &31 49
- &32 50 NetFS - Poll transmit
- &33 51 NetFS - Poll receive
- &34 52 NetFS - Delete receive block, enable/disable events on reception
- &35 53 NetFS - Disconnect REMOTE
- &36 54
- &37 55
- &38 56
- &39 57
- &3A 58
- &3B 59
- &3C 60
- &3D 61
- &3E 62
- &3F 63 ZNOS CP/M - Reload CCP and BDOS
- &40 64
- &41 65
- &42 66
- &43 67 ParaMax - Enter CNC control program
- &44 68 Test sideways RAM presence
- &45 69 Test PSEUDO/Absolute usage
- &46 70 Read/write country number
- &47 71 Read/write alphabet or keyboard number
- &48 72
- &49 73
- &4A 74
- &4B 75
- &4C 76
- &4D 77
- &4E 78
- &4F 79
- &50 80
- &51 81
- &52 82
- &53 83
- &54 84
- &55 85
- &56 86
- &57 87
- &58 88
- &59 89
- &5A 90 Find/set ROM status
- &5B 91
- &5C 92
- &5D 93
- &5E 94
- &5F 95
- &60 96 Terminal Emulator flow control
- &61 97 HKSET Page timeout monitor
- &62 98 HKSET Poll received page status
- &63 99
- &64 100 Enter SPY debugger
- &65 101
- &66 102
- &67 103
- &68 104
- &69 105
- &6A 106 Select pointer/activate mouse
- &6B 107 External/Internal 1MHz Bus
- &6C 108 Main/Shadow RAM Usage
- &6D 109 Make Temporary FS permanent
- &6E 110 Early Watford DFS - Control drive double-stepping, superceeded by *OPT40, *OPT80[1]
- &6F 111 Read/Write shadow RAM switch
- &70 112 Select Main/Shadow for VDU access
- &71 113 Select Main/Shadow for Display hardware
- &72 114 Write to Shadow/Main toggle
- &73 115 Blank/restore palette
- &74 116 Reset internal sound system
- &75 117 Read VDU Status Byte
- &76 118 Reflect keyboard status in LEDs
- &77 119 Close all Spool/Exec files
- &78 120 Write Key Pressed Data
- &79 121 Keyboard Scan
- &7A 122 Keyboard Scan from &10
- &7B 123 Printer Dormancy Warning
- &7C 124 Clear ESCAPE Condition informing Tube if necessary
- &7D 125 Set ESCAPE conditon
- &7E 126 Acknowledge ESCAPE Condition
- &7F 127 Check for EOF
- &80 128 Read ADC Channel/Buffer/Mouse/Device status
- &81 129 Read Key with Time Limit/Scan for any keys/Read OS version
- &82 130 Read High Order Address
- &83 131 Read bottom of user memory (OSHWM)
- &84 132 Read top of user memory
- &85 133 Read base of display RAM for a given mode
- &86 134 Text cursor position
- &87 135 Character at text cursor and screen MODE
- &88 136 Perform *CODE
- &89 137 Cassete Motor Control
- &8A 138 Place character into buffer
- &8B 139 Set filing system attributes (do *OPT)
- &8C 140 Select Tape FS at 1200/300 baud (do *TAPE)
- &8D 141 Select RFS (do *ROM)
- &8E 142 Enter Langauge ROM
- &8F 143 Issue SWR Service Request
- &90 144 Set TV offset and interlacing (do *TVx,y)
- &91 145 Read character from buffer
- &92 146 Read FRED
- &93 147 Write FRED
- &94 148 Read JIM
- &95 149 Write JIM
- &96 150 Read SHELIA
- &97 151 Write SHELIA
- &98 152 Examine Buffer Status
- &99 153 Write character into input buffer checking for ESCAPE
- &9A 154 Write to Video ULA control register and RAM copy
- &9B 155 Write to Video ULA palette register and RAM copy
- &9C 156 Read/write ACIA registers
- &9D 157 Fast Tube BPUT
- &9E 158 Read from Speech Processor
- &9F 159 Write to Speech Processor
- &A0 160 Read VDU Variable
- &A1 161 Read CMOS RAM
- &A2 162 Write CMOS RAM
- &A3 163 Reserved for applications software
- &A4 164 Check Processor Type
- &A5 165 Read output Cursor Position
- &A6 166 Read Start of MOS variables
- &A7 167 Read Start of MOS variables
- &A8 168 Read address of extended vector table
- &A9 169 Read address of extended vector table
- &AA 170 Read address of ROM info table
- &AB 171 Read address of ROM info table
- &AC 172 Read address of keyboard table
- &AD 173 Read address of keyboard table
- &AE 174 Read address of VDU variables
- &AF 175 Read address of VDU variables
- &B0 176 Read/Write Tape Timeout
- &B1 177 Read/Write input device
- &B2 178 Read/Write keyboard interrupt enable
- &B3 179 Read/Write primary OSHWM/Read/Write ROM polling semaphore
- &B4 180 Read/Write OSHWM
- &B5 181 Read/Write RS423 interpretation
- &B6 182 Read/Write Font Explosion/Read NOIGNORE Status
- &B7 183 Read/Write TAPE/ROM switch
- &B8 184 Read/Write MOS copy of Video ULA control register
- &B9 185 Read/Write MOS copy of palette register/Read/Write ROM polling semaphore
- &BA 186 Read/Write ROM active on last BRK
- &BB 187 Read/Write ROM number of BASIC
- &BC 188 Read/Write current ADC channel number
- &BD 189 Read/Write highest ADC channel number
- &BE 190 Read/Write ADC type
- &BF 191 Read/Write RS423 busy flag
- &C0 192 Read/Write ACIA control register
- &C1 193 Read/Write flash counter
- &C2 194 Read/Write first colour duration
- &C3 195 Read/Write second colour duration
- &C4 196 Read/Write auto Repeat Delay
- &C5 197 Read/Write auto Repeat Period
- &C6 198 Read/Write *EXEC file handle
- &C7 199 Read/Write *SPOOL file handle
- &C8 200 Read/Write BREAK/ESCAPE effect
- &C9 201 Read/Write keyboard Enable/Disable
- &CA 202 Read/Write Keyboard Status
- &CB 203 Read/Write RS423 in buffer minimum
- &CC 204 Read/Write RS423 ignore flag
- &CD 205 Read/Write RS423 destination/Read/Write user key string length
- &CE 206 Read/Write ECONET call intepretation
- &CF 207 Read/Write ECONET input intepretation
- &D0 208 Read/Write ECONET output intepretation
- &D1 209 Read/Write speech supression status
- &D2 210 Read/Write sound supression flag
- &D3 211 Read/Write channel for BELL
- &D4 212 Read/Write volume/ENVELOPE For BELL
- &D5 213 Read/Write frequency for BELL
- &D6 214 Read/Write duration for BELL
- &D7 215 Read/Write Startup Message Enable/Disable
- &D8 216 Read/Write user key string length
- &D9 217 Read/Write paged line count
- &DA 218 Read/Write VDU Queue length
- &DB 219 Read/Write ASCII code for TAB
- &DC 220 Read/Write ASCII for ESCAPE
- &DD 221 Read/Write Intrepretation ASCII 197-207
- &DE 222 Read/Write Interpretation ASCII 208-223
- &DF 223 Read/Write Interpretation ASCII 224-239
- &E0 224 Read/Write Interpretation ASCII 240-255
- &E1 225 Read/Write Interpretation of F-Keys
- &E2 226 Read/Write Interpretation of Shift-F-Keys
- &E3 227 Read/Write Interpretation of Ctrl-F-Keys
- &E4 228 Read/Write Interpretation of Ctrl-Shift-Fkeys
- &E5 229 Read/Write ESCAPE key status
- &E6 230 Read/Write ESCAPE effects
- &E7 231 Read/Write 6522 User IRQ Mask
- &E8 232 Read/Write 6850 IRQ Mask
- &E9 233 Read/Write 6522 System IRQ Mask
- &EA 234 Read/Write Tube present flag
- &EB 235 Read/Write speech Processor Pressence
- &EC 236 Read/Write character output device status
- &ED 237 Read/Write Cursor Edit State
- &EE 238 Read/Write base of numeric pad
- &EF 239 Read/Write shadow state
- &F0 240 Read/Write Country flag
- &F1 241 Read/Write value written by *FX1
- &F2 242 Read/Write OS copy of serial ULA register
- &F3 243 Read/Write offset to current TIME value
- &F4 244 Read/Write soft key consistency flag
- &F5 245 Read/Write printer Type
- &F6 246 Read/Write printer Ignore character set by *FX6
- &F7 247 Read/Write Intercept BREAK/Define action of BREAK key
- &F8 248 Read/Write LSB BREAK intercepter jump address
- &F9 249 Read/Write MSB BREAK intercepter jump address
- &FA 250 Read/Write RAM used for VDU access, Watford RAM board status
- &FB 251 Read/Write RAM used for Display hardware
- &FC 252 Read/Write current language Rom Number
- &FD 253 Read/Write Last Reset Type
- &FE 254 Read/Write available RAM/Read/Write effect of shift/ctrl on Numeric pad
- &FF 255 Read/Write startup Options
Jgharston 18:54, 11 September 2007 (BST)
- ↑ The Micro User, August 1986, p.22.
