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release_notes.md

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français

STM8 Tiny BASIC release notes

2023-05-08

version V5.0R1

  • Again changes in BASIC commands set.

    • AUTORUN command have been removed. Now for a program to be executed at bootup it must be saved as MAIN file name.
    • Commands CLK_HSE and CLK_HSI have been replaced by CLOCK command and 2 system constants, HSI and HSE. These 2 constants are to be used as parameter for CLOCK command.
    • CHAIN command don't support line number as second parameter. The chained program execute from first line.

  • Other modificatgion to code are optimisation and bugs correction.

2023-04-27

version V4.0R0

  • This version is incompatible with previous version hence the change in major version number.

    • Function BIT() is no more available, same result can be obtained with function LSHIFT()
    • Commands BRES,BSET and BTOGL have a different semantic making them incompatible with previous versions.

  • Command RANDOMAIZE have been added.

  • Major change have been made to virtual machine to improve performance.

2023-04-22

  • Version V3.2R1

    • This is a performance revision. The virtual machine that execute BASIC bytecode has been change. As register Y was no more used since the abandon of a second stack for parameters it was freed. Then is now repurposed as VM program counter. In previous model register X was used for this purpose and it was required to save it continually to basicptr system variable. With this new model Y rarely require to be saved and when it is required it is pushed on stack. Also the calling model for BASIC commands as changed from a CALL-RET model to a JP code - JP interp_loop. This save 4 clocks cycles per call. This result in an improved VM performance between 25% to 50% depending on code executed. the LET keyword is still slow because evaluating expression is comples. Neverthess a 25% gain is observed.

    • Aside of this optimisation some new bugs have been discovered and corrected.

    • Also a correction in reference manual have been done where 2 paragraphs where using the same link name.

    • All programs in BASIC directory run without issue.

2023-03-09 V3.1R12

  • Two new commands added:
    • CLK_HSE to switch MCU master clock to external crystal or oscillator.
    • CLK_HSI to switch MCU master clock to internal 16Mhz oscillator.

2022-12-30 V3.1R1

Added PWM commands and update reference manual. Pre release V3.1R1 created.

  • PWM.CH.EN
  • PWM.EN
  • PWM.OUT

2022-12-24, V3.0R4

  • Rewriting of arithm24.asm to improve expression evaluation performance.

  • Removing parameter stack that was using Y register as stack pointer. Now BASIC commands and functions receive their arguments on regular stack.

  • As the parameter stack was removed all related commands and functions have also been removed. They borrowed from Forth language philosophy and were not a good fit for a Tiny BASIC language.The removed commands and functions are:

    • ALLOC
    • DROP
    • PICK
    • POP
    • PUSH
    • PUT

2022-12-02, version 2.6R2_D2

2022-12-01 Version 2.6R2

Documentation is completed in english and french. The following PDF documents are available in project root directory.