Small update to TMS9918: 5th sprite on scanline flag

A project log for RC2016/99: TI-99/4A clone using TMS99105 CPU

Retrochallenge 2016/10 entry and winner: try to build a TI-99/4A clone using a TMS99105 CPU and an FPGA. In a month...

Erik PiehlErik Piehl 04/01/2017 at 03:580 Comments

After a while a quick update: I found at AtariAge a really cool demo for the TI-99/4A, using scanline effects.

Link to AtariAge

Unfortunately that did not work on my TMS99105+FPGA system, as my TMS9918 VHDL model did not support detecting 5 or more sprite per scanline condition. That's now fixed, and the demo runs :)