zeptoforth

This release:

• breaks the core PicoCalc terminal emulator task, which polled for IO, into three tasks, one for input, one for output, and one for screenshots, which all block, resulting in lower CPU usage at the expense of somewhat higher SRAM usage.
• fixes the escape key combos generated by some of the function keys in the PicoCalc terminal emulator.

This release:

• multiplies XOSC_DELAY by 64 for the RP2040 and RP2350 in an effort to resolve the reliability problems seen by some on the PicoCalc.
• eliminates garbage left on the stack by pio:::pio.
• modifies dma::DREQ_PIO_TX and dma::DREQ_PIO_RX so they can take pio::PIO0, pio::PIO1, and on the RP2350 pio::PIO2 in addition to indices 0, 1, and 2 for the PIO block for the sake of consistency with other PIO words.

This release:

• includes an optional software SHA-256 implementation.
• includes optional support for the RP2350's hardware SHA-256 accelerator. One important note is that only one SHA-256 can be generated at a time due to the limitations of the SHA-256 accelerator, so in use cases where this is not acceptable one may wish to use the software SHA-256 implementation even when targeting the RP2350.
• fixes issues with escaped string literals where previously they were not parsed properly if evaluate'd or if hex digits for \x were omitted.

This release:

• adds single-core builds on the RP2040 and RP2350 to enable executing arbitrary code on the second core alongside zeptoforth on the first core; note that only the kernel binaries are included in the release tarball, and if the user desires to use these builds in practice they will need to build the remainder themselves.
• adds the ability to postpone numeric literals.
• adds ]] ... [[ to eliminate explicit calls to postpone (note that local variables cannot be used here).
• adds cycles::cycle-counter to give a cycle count on non-ARM Cortex-M0+ platforms (i.e. non-RP2040 platforms); note that cycles::init-cycles must be called beforehand to start cycle counting and initialize the cycle count to zero.

This release:

• adds the variable term-cols, for controlling the terminal columns in characters used by words, words-in, lookup, lookup-in, more-words, more-words-in, more-lookup, more-lookup-in, dump, dump-halfs, dump-cells, dump-ascii, and edit. This variable defaults to a value of 80. Note that more-words, more-words-in, more-lookup, more-lookup-in, and edit also query the terminal for its width, and use the minimum value of this and the value of term-cols. Also note that edit only uses this to determine whether to display a border on its sides and line numbers; it does not shrink smaller than 64 characters wide.
• adds the variable words-col-width, for controlling the width in columns of each column of words displayed by words, words-in, lookup, lookup-in, more-words, more-words-in, more-lookup, and more-lookup-in. This variable defaults to a value of 20.
• modifies picocalc-term::term-console to automatically set term-cols to the width of the PicoCalc terminal emulator in characters when called.

This release:

• fixes an issue with the PicoCalc BIOS firmware version 1.4, where zeptoforth would get stuck in a boot loop once extra/rp_common/picocalc_term.fs or extra/rp_common/picocalc_term_text.fs was installed due to the RST command sent by extra/rp_common/picocalc_bios.fs to the STM32 BIOS on the PicoCalc motherboard triggering a board reset.

Note that the binaries have not been changed, so they will still report version 1.14.2.3.

This release:

• fixes a bug in extra/rp_common/picocalc_sound.fs where if a long time had passed since the last reboot, playing a tone (e.g. a beep) on the PicoCalc may result in the tone being stuck on.

Note that the binaries have not been changed, so they will still report version 1.14.2.3.

This release:

• fixes issues with turtle graphics for angles that are multiples of 45 degrees.
• removes utils/zeptoforth_venv that was previously erroneously included from .tar.gz files.
• adds functionality to utils/package.sh to remove utils/zeptoforth_venv from generated .tar.gz files.

Note that the binaries have not been changed, so they will still report version 1.14.2.3.

This release:

• fixes bugs in interrupt::vector!, clocks::set-sysclk, and clocks::set-sysclk-overclock caused by inappropriately using internal::hold-core instead of internal::force-core-wait which caused the other core to lock up when both cores of the RP2040 or RP2350 were active.

This release:

• attempts to fix an issue where in some cases file/directory dates could generate exceptions in FAT32 filesystems.
• fixes rchan::init-rchan so it does not leave a single cell of garbage on the data stack.