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• BeebEm for UNIX README
  BeebEm for UNIX BeebEm for UNIX is a BBC Micro and Master 128 emulator. It enables you to
  33 KB (5,317 words) - 20:12, 8 March 2015
• Prompting for menu keypresses
  ...to the menu after entering a series of *commands. This can be annoying if, for example, you want to catalogue the disk to see what files are there, and th
  1 KB (187 words) - 23:00, 3 July 2016
• Test for DFS-like filing systems
  is being used, for instance to avoid using *CDIR and to avoid this can be used to test for a DFS-like filing system.
  1 KB (170 words) - 20:13, 8 March 2015
• Extra memory for BASIC programs
  '''HIMEM''', for instance: space, leaving 500 bytes left over for other variables. Note also that you
  4 KB (593 words) - 15:08, 21 April 2020
• Testing for sideways RAM
  affecting the operation of any code. For example, if you changed &8000 and ===Testing for sideways RAM===
  4 KB (538 words) - 18:55, 12 November 2017

Page text matches

• Main Page
  ...:Category:Peripherals|Peripherals]]</td><td valign="top">External hardware for 8-bit Acorn computers.</td></tr> For new users there is a [[Sandbox]] to play in where you can hone your Wiki
  3 KB (397 words) - 19:30, 16 January 2023
• Day Of Week in 6502 machine code
  \ This routine works for any date from 1900-03-01 to 2155-12-31. \ On exit, A=day of week 0..6 for Sun..Sat, Carry will be Set
  2 KB (260 words) - 20:12, 8 March 2015
• Denormalising a number
  LDX #&FC :\ Negate for negative number familiar with this form known as exponential format. For example:
  4 KB (520 words) - 07:09, 30 June 2018
• Detokenising in 6502 machine code
  The following code, which must run in the I/O processor, will search for INY:BNE TokPrLp3 :\ Loop back for next character
  4 KB (523 words) - 20:12, 8 March 2015
• Number output in 6502 machine code
  LDX #&FF:SEC :\ Prepare for subtraction LDX #&FF:SEC :\ Prepare for subtraction
  7 KB (891 words) - 07:13, 30 June 2018
• Setting Clearing and Copying bits of data
  AND xx will clear the bits in A that are also clear in xx, for example: ORA xx will set the bits in A that are also set in xx, for example:
  2 KB (281 words) - 07:10, 30 June 2018
• Simple Disassembler
  .../Software/Assembler for fuller-featured disassemblers and disassembly code for different CPUs. FOR Z%=0 TO 2:data%?Z%=FNrm(addr%+Z%):NEXT
  3 KB (443 words) - 20:13, 8 March 2015
• Simple ROM selection command code
  It can also be convenient for other code that refers to filing system numbers and channels to reference the Filing System Info directly, for
  3 KB (414 words) - 14:59, 8 March 2015
• Square roots in 6502 machine code
  increasing odd numbers can be subtracted from the starting value. For FOR A%=1 to 65535:!in=A%:CALL sqr:P.A%,out?0,out?1:NEXT
  2 KB (272 words) - 20:13, 8 March 2015
• Address of a variable
  BBC BASIC for Windows implements the <code>^identifier</code> function (as of a variable. For example, <code>^fred%</code> returns the address where
  3 KB (535 words) - 02:55, 10 February 2022
• BASIC Versions
  BBC BASIC for various platforms and CPUs is named as: * BBC BASIC (65) for 6502, 65C02, 65C12, etc
  4 KB (557 words) - 01:28, 31 January 2016
• BBC BASIC
  Originally developed by [[Sophie Wilson|Roger Wilson]] for the BBC
  2 KB (244 words) - 15:56, 4 January 2024
• 6502 BBC BASIC
  * DIM space X does not check for X being negative * If a FN is used in a FOR command, the software stack is corrupted
  8 KB (1,271 words) - 01:27, 10 February 2022
• ARM BBC BASIC
  * Commands for the new sound system, mouse, graphics ...s. When strings are allocated, the appropriate string-size list is scanned for a free space before extending the heap.
  5 KB (723 words) - 21:35, 8 March 2015
• Converting Binary Coded Decimal
  ...l number as a hexadecimal value using the hex digits 0-9 and ignoring A-F. For example, the number 21 (hex &15) would be represented as &21 (decimal 33). See also [[{{TALKPAGENAME}}#More_efficient_variants?|Discussion]] for an enhanced implementation.
  2 KB (278 words) - 22:12, 7 November 2016
• Data without DATA
  It is common for programs to put commonly used data in '''DATA''' statements which are then FOR mon%=1 TO 12:READ mon$(mon%):NEXT mon%
  1 KB (224 words) - 22:16, 3 July 2016
• Forcing a variable to exist
  '''By JGH, Jun 2007. Based on article by Richard Russell for BBFW Wiki, May 2006'''
  2 KB (378 words) - 22:23, 3 July 2016
• Program format
  PTR#in%=EXT#in%-4:FOR A%=0 TO 3:buffer%?A%=BGET#in%:NEXT ''by JGH, May 2006, originally for BBFW Wiki''
  3 KB (463 words) - 15:24, 4 December 2017
• Global control block
  BASIC V looks for higher-order parts of the address in ''Y%'', for compatibility
  2 KB (345 words) - 22:24, 3 July 2016
• Relocating variables on the 6502 Second Processor
  it uses. You have 30K for the program but only 14K for variables. What would variables in &800-&8000, giving more space for variables than for the
  9 KB (1,340 words) - 02:09, 31 January 2016

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