OSBYTEs

• &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
• &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)

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