V6Z80P v1.0

Boards produced: None.

V6Z80P v1.1

Boards produced: about 40.
Revision reasons: Changed IC footprints.

V6Z80P+ v1.0

Boards produced: 10.
Revision reasons:

• Use VGA socket for video, instead of mini-din socket (adapter cable now only required for SCART)
• Provide alternative FPGA clock inputs via header pins.
• Provide gated CPU A14 signal (allows 16KB paging)

Other changes:

• 3-pin mini-DIN socket for serial port.
• Support for Sega megadrive joysticks.

V6Z80P+ v1.1

Boards produced: 10
Release notes
Revision reasons:

• Allow FPGA to drive CPU clock.
• 74HC04+crystal oscillator footprint allowing 14MHz alternative oscillator, giving 7MHz pixel clock and 3.5MHz CPU clock for Spectrum emulator).

Other Changes:

• EEPROM footprint is SMT only.
• 4-pin mini DIN socket for serial port.

V6Z80P+ v1.1b

Boards produced: 10

• SD card connector is now push-push type (due to difficulty in sourcing type originally used). Card slot is in a slightly different position (surrounding components moved to make space too.)
• Removed "OSC SEL" switch (unnecessary)
• Wider pads to accomdate SOIC-W 8-pin style EEPROM (PIC code supports SST25VF32).