Zx Sizif 512 Versions Save

• Added SpecDrum support (Covox variation on #DF port);
• Added option to remap gamepad button A as UP;
• Increased AY volume;
• Implemented fast 48 Basic boot when "Auto CPU freq" option is enabled;
• Slightly improved 128 int timings;
• Fixed 128 Basic crash when DivMMC is enabled;
• Fixed esxDOS TAP file loading in +3e mode;
• Fixed ULA+ IO contention for classic timings (HAM256.TAP has been affected)
• Fixed Magic button handling when DivIDE addon is installed;
• Attribute port is now accessible only via #FF address in classic timings. This is necessary to prevent a bus conflict when reading ports from addons. Pentagon mode hasn't been affected as it's already used only #FF port in previous versions.

• Added support for PCB rev.E;
• Added auto CPU frequency feature. When it's enabled:
  • Frequency sets to 14MHz on esxdos activity - for fastest loading from SD card;
  • Frequency sets to 3.5MHz within ~1ms after #FE port access - this allows to load from tape within turbo mode. Also this improves beeper sound effects;
  • Otherwise user configured frequency is used
• Added support for ZXKit1 VGA converter. When ZXKit1 setting enabled in menu:
  • Hsync on EGA header acts as Csync;
  • Vsync on EGA header acts as 14MHz out
• Changed PS/2 keyboard mapping:
  • Pause has been moved from F12 to F1;
  • Reboot has been assigned to F10 and F12 (but still present on Ctrl-Alt-Del / Ctrl-Alt-Backspace)
• SD card setting can now be saved;
• Allow NMI call when DivMMC's MAPRAM in use (i.e. custom ROM file loaded from SD card);
• Fixed compatibility with some PS/2 keyboards, fix random keys sticking;
• Fixed incorrect operation of some AY chips when turbo mode is enabled;
• Fixed exiting from pause;
• Fixed compatibility with addons asserting RSTCPU signal (e.g. Dandanator);
• Fixed kempston port decoding - add #DF port for some rare games.

• Added ability to save user configuration to flash (only SST39SF0x0 supported);
• Added option to disable sd indication on border;
• Added bright boost option;
• Added boot menu when holding CS on power-on;
• Added NE GLUK rom boot option;
• DivMMC (ESXDOS) controller is now automatically disabled when BDI (TRDOS) controller connected;
• Implemented Z-Controller (ZC) SD card controller;
• Replaced DivMMC NO-OS mode by ZC;
• Replaced +3e rom to support ZC (thanks to nihirash);
• Menu was slightly refactored.

• Significantly improved 48/128 classic timings;
• Replaced 'Timings', 'RAM', '+3' settings with one 'Machine' setting;
• Rearranged ROMs - added specific ROMs for Pentagon, 48K, 128K and +3e machines, added Looking Glass BASIC (only for rev.D pcb);
• Added custom boot options: hold '1' key on poweron to boot ZX81 or '2' for ZX80. These modes are sticky until next poweron (only for rev.D pcb);
• Added 4.4MHz and 5.2MHz turbo modes for some old games where 3.5MHz isn't enough but 7MHz is too much;
• Added support for external AY on ZXBUS;
• Added DivMMC NO-OS option to disable esxDOS but keep SD card online. Useful for +3e mode. Also NO-OS activated by default when custom ROM used, which will be useful for addons like Dandanator, MVcomp BDI and etc;
• DivMMC is automatically disabled if no SD card inserted at poweron;
• Improved pause ('F12' on ps/2 keyboard or 'Start' on gamepad);
• Improved ulaplus video output quality;
• Improved 14MHz turbo mode stability;
• Fixed compatibility with some +3 software (#1ffd port fix);
• Fixed hanging of esxDOS LFN browser after magic key double press;
• Fixed incorrect pallete after enabling ulaplus in menu;
• Fixed magic menu glitches if ROM was shadowed at boot (for Dandanator Mini addon).

Both CPLD and ROM firmwares should be updated for proper operation.

CPLD:

• Add menu for magic button;
• Fix conflict between ay and attribute port in 48 and 128 timings;
• PS/2: don't take Alt as fire key when Ctrl-Alt-Del combination is pressed.

ROM:

• Add menu for magic button;
• Update DiagROM to version 54.

You need to update both CPLD and ROM firmware for proper operation.

CPLD:

• Fix unpausing after reboot by ctrl-alt-del;
• Some stability improvements in magic menu.

ROM:

• Mute SAA1099 on reset.

CPLD and ROM:

• Fix compatibility with ZXBUS addons with ROM (broken in v20210710);
• Fix internal diagnostics and ZX81 ROMs (broken in v20210710).

You need to update both CPLD and ROM firmware for proper operation.

CPLD:

• Implement PS/2 keyboard driver
• Fix leaving magic handler in 14MHz turbo mode
• Enable clamping diodes on some CPLD pins just to be safe
• Improve reliability in 14MHz mode; fix reading from nonexisting ports
• Internal firmware refactoring

ROM:

• No changes

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