2 blog posts tagged Z80

VTX5000: Part 5 - Rendering

In part 4 we followed data to and from the TI modem through the Intel 8251 USART landing in our buffers. Now comes the interesting part - rendering those Viewdata 40×24 frames on what is typically a 32×24 display.

MAY

2026

Technology12 minutes

VTX5000: Part 4 - Communications

In part 3 we saw how the VTX5000's 8K ROM is structured and how the BASIC program drives the terminal.