STEbus Colour Graphics and Text

SGT1

The SGT1 brings high-resolution colour graphics to the STEbus. Graphics and text can be mixed on the screen, and the on-board 6803 processor with 64 kbytes of RAM and a 6845 CRTC deals with graphics generation and terminal emulation.

High-level graphics commands are implemented in the 8 kbytes of on-board firmware, so the user can easily generate text, lines and arcs by I/O commands on the STEbus. Other commands can change resolution and download memory, programs, character sets and terminal commands.

Basic resolution is 288 lines by 640 (4 colours) or 320 (8 colours). Text modes are 32 lines of 20, 40 or 80 characters.

Outputs from the SGT1 are RGB.

The SGT1 can be extended with an SGTX extension board which provides genlock to external video sources.

Interface: STEbus slave.

Power consumption: Typ 1.2 A @5V

Features:

• High-resolution colour graphics and text
• 320 × 288 pixels (8 colours)
• 640 × 288 pixels (4 colours)
• On-board firmware
• Simple but powerful graphics commands