- SIOINTS allows disabling use of interrupts in the SIO driver when interrupts are enabled globally. It will not allow you to enable SIO interrupts if interrupts are globally disabled (INTMODE 0).
The Microdrives behave slightly differently than either normal spinning drives or CF Cards. This update removes the "short" timeout that is used in the IDE/PPIDE drivers which caused timeout issues for the Microdrives.
The short timeout was originally used to workaround excessive wait/stall during boot of some media. I don't think it is necessary any more because of additional intelligence in the initialization routines.
- Unique I/O configuration for Les Bird's Graphics/Sound/Joystick Module has been removed because the module now conforms to generic MSX port conventions.
- Will Sowerbutts provided an updated flash4 v1.3.9
- Modified HBIOS to be more proactive about disabling interrupts on systems with interrupts disabled to avoid issues with applications that turn them on.
- Updated NABU default configuration to run under interrupt mode 2.
Co-Authored-By: Will Sowerbutts <will@sowerbutts.com>
- Add Z280 interrupt mode 3 to INTTEST app
- Make application boot handle restart by using HBIOS restart in place
- Resolve multiple issues with HBIOS restart in place
- Add a hack to TUNE application to avoid corrupting PSG R7 which is used by and critical to NABU.
- NABU default baud rate to 38400 to get file transfers working without flow control.
- NABU default to console on video instead of UART.
- Implement Interrupt Mode 2 (Mode 1 is still default)
- Implement interrupt driven keyboard support
- Improve UART keyboard driver to support interrupt driven flow control
- Additional HBIOS reorganization - no functional changes (in theory)
- Upgrade to v1.3.8 of FLASH4 from Will Sowerbutts
- Upgrade to FAT v1.1 based on input from Peter (@z80micro-mc)
Co-Authored-By: Will Sowerbutts <will@sowerbutts.com>
Update CLRDIR with minor update from the author Max Scane to emphasize the need to type a capital Y to proceed. Thanks and credit to Max Scane for this application.
Adds CLRDIR to the Applications document.
- Rearranged HBIOS code to improve colocation of related code.
- Implemented macros to improve control over assembly diagnostic output.
- Improved handling of diagnostic LEDs.
- Improved application boot bank management.
- Implemented application boot for Z280 systems.
- Moved Z280_BNKSEL into proxy.
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- Translate NABU special keys to standard RomWBW values to allow things like arrow keys to emit proper escape sequences within ANSI emulation.
- Add a simple, single byte buffer to avoid keyboard status returning a key is ready when it is only a special character that has no translation.
- Modified TMS driver to always imbed an uncompressed font. This is because I have found no reasonable way to decompress a font while an OS is still active without mangling some of the OSes RAM.
- This change avoids clearing the screen every time an OS reset occurs. A non-destructive VDC reset is now performed that leaves the screen contents and cursor position unchanged.
- If an application overwrites the video RAM, then the screen may contain garbage upon return to OS. However, the console will still be functional and the user can just press enter a few times to clear the screen.
- When an OS performs a reset operation, the HBIOS hook has been extended to automatically reset the video hardware of the CRT device (if it exists).
- This should go a long way toward fixing corrupt video after an application is run that reprograms the video hardware.
- An OS reset may or may not be performed when an application exits depending on the behavior of the application. So, if an application exits without initiating a reset, then the video will not be reset. Most applications that muck with the video chip directly will perform the reset at exit, so this is not normally an issue.
- If the OS encounters an error (such as drive not ready when doing a DIR), the error message may be erased by this new behavior depending on the specific scenario.