GitLab

Detail:
  See Doc/BASICVFP for overall design/specification
  File changes:
  - !Mk,fd7, !MkClean,fd7, !MkRom,fd7, Makefile - update build scripts to support BASICVFP target
  - Resources/UK/Messages - Add a few new messages
  - hdr/Definitions - Define BASICVFP register usage and a few utility macros
  - hdr/WorkSpace - Define BASICVFP workspace adjustments. Add a few asserts to check some workspace constraints are maintained.
  - s/* - Lots of changes to add support for BASICVFP variant of the module
Admin:
  Tested on Raspberry Pi 1/2/3, BB-xM


Version 1.67. Tagged as 'BASIC-1_67'

For the standalone case BASIC[64] will now register its own resources into Resources/BASIC/BASIC[64]Msgs.
For the ROM case BASIC[64] will share them in Resources/BASIC/Messages as before.
This ensures that regardless of the order of loading, and the potential that a ROM and standalone version might be mixed, both ends up seeing the messages its expecting to see.
Tested in a ROM build and softloaded on RISC OS 4.02.

Version 1.57. Tagged as 'BASIC-1_57'

Lined up some comments.
Changed LNK filenames to be Unix style (thing.s rather than s.thing).
Tagged as BASIC-1_57-pre2

Detail:
  The commands TWIN and TWINO are redundant, so have been removed and
  now give a 'Mistake' error. The tokenisation has not been changed. CALLEDNAME
  is now redundant, but the first byte is used as a QUIT flag, so it has not
  been changed. BasicTrans was also changed to remove references to TWIN, and
  say 'This command is no longer available'. Fixes line number of error when
  TWIN entered after Fix 1.
Admin:
  Changes by Martin Avison

Version 1.53. Not tagged

Admin:
  Provided by Martin Avison, as part of his error handling changes in the
  following commits. This particular commit should build as binary identical
  to version 1.53.

Version 1.53. Not tagged

Neither the module title nor the filename turned out to be right.
Retagged as BASIC-1_53.

It may fail if not available, but so did 'EDIT'. This way if it is available at least the 'EDIT' command enters the editor.
Note: this replaces the recommendation to load from ADFS::0.$.Modules.BasicEdit in the chapter "Editing BASIC files under RISC OS 2" in the BBC BASIC reference manual (!).

Version 1.53. Tagged as 'BASIC-1_53'

Effectively raises the longest text program you can load to ~64k lines.

Version 1.48. Tagged as 'BASIC-1_48'

Detail:
  * Uses global LDW macro instead of locally-defined LOAD macro (or longhand
    implementations)
  * Some other cases of unaligned loads for v6+ added in places that didn't
    lend themselves to the LDW macro
  * 5-byte (FP) load operation now macroised - the macro skips the unnecessary
    BIC when assembling only for pre-v6 CPUs, or uses unaligned loads for
    v6+ CPUs (unless NoUnaligned global flag is set)
Admin:
  Tested on a rev B7 beagleboard.

Version 1.43. Tagged as 'BASIC-1_43'

Detail:
  s/Command - LOADFILETOKENCOPY now uses compile-time architecture flags to decide how to handle the potential unaligned load while copying data
  s/ModHead - Include Hdr:CPU.Arch to get architecture flags
Admin:
  Tested on rev C2 beagleboard. Untested on Tungsten/IOMD, but should be fine.


Version 1.42. Tagged as 'BASIC-1_42'

This update replaces lots of hard-wired definitions of things such as SWI
names with the ones from the main exports in the build environment. It
should build a binary-identical module to the previous revision.

Author: Rob Sprowson

Version 1.40. Tagged as 'BASIC-1_40'

Bugfix: the TITLE routine was stacking and unstacking R13. This is defined as UNPREDICTABLE in the ARM ARM, and while it seems to have been harmless on older ARMs, the XScale corrupts R13 - in this case, it was always loaded with the value &80F0. This meant that you couldn't load untokenised BASIC programs via the *BASIC command because TOP was already above the bottom of the stack!

Also optimised a non-aligned data copy routine a little bit.

Version 1.34. Tagged as 'BASIC-1_34'

  * Comments added.
  * Added DIM LOCAL.
Detail:
  * All of the 408 instances of pushes and pops of a single register
    (i.e. "LDMIA SP!,{PC}") have been replaced with an LDR/STR equivalent,
    which provides a small performance boost on StrongARM-like processors.
  * Some obscure bits of the source have had comments added.
  * The new DIM LOCAL statement has been added:

    Syntax: DIM <numeric variable> LOCAL <numeric expression>

    DIM LOCAL allocates space from the BASIC stack rather than from the
    heap. This means that the space allocated is automatically freed on
    exit from the PROC or FN in which it was claimed.

    As with all LOCAL statements, it must appear in a PROC or FN definition
    and cannot appear inside a structure which uses the stack (i.e. NEXT)
    or after a LOCAL ERROR.

    Much like the manner in which "DIM foo% -1" returns the value of FSA
    without allocating space, "DIM foo% LOCAL -1" returns the value of SP
    at the time of the request, without allocating any space from the stack.
    This can be useful in computing the free space between the top of the
    BASIC heap and the bottom of the stack. Of course, the stack is used by
    BASIC while interpreting the program, so the contents of memory below
    foo% should always be treated as undefined.

    One caveat of using DIM LOCAL is that the stack cannot be moved while
    there are DIM LOCALs defined. END= will return an error and any
    Service_Memory calls will be claimed for the duration of the DIM LOCAL.
Admin:
  Builds and tested on RiscPC.
  Requires BASICTrans-2_06.

Version 1.30. Tagged as 'BASIC-1_30'

Detail:
  Makefile strips dependencies during the clean phase.

  Sources moved into an 's' directory.

  All sources reformatted into a more readable layout.
Admin:
  Builds binary-identical versions of BASIC and BASIC64 modules to
  version 1.22

Version 1.23. Tagged as 'BASIC-1_23'