Xerox X820

• Z80 @ 2.5 Mhz / @4Mhz (x820-ii)
• 64k RAM
• 80x24 character based display

Classic library support (+cpm -subtype=x820)

• Native console output
• Native console input
• ANSI vt100 engine
• Generic console
  • Redefinable font
  • UDG support
  • Paper colour
  • Ink colour
  • Inverse attribute
  • Bold attribute
  • Underline attribute
• Lores graphics
• Hires graphics
• PSG sound
• One bit sound (x820-ii)
• Inkey driver
• Hardware joystick
• File I/O
• Far heap
• Interrupts
• RS232

Compilation

zcc +cpm -subtype=x820 program.c -create-app

Will create a raw disc image suitable for use by CP/M

Library support

Lores graphics

The default lores graphics resolution is 80x24, which uses an incomplete character to represent a pixel which results in pixels not actually adjoining. By calling gfx_set_fatpix(0) an alternate 80x48 mode is enabled which doubles the vertical resolution, and provides for squarer pixels at the cost of more whitespace.