Inaccuracies with Titan Overdrive Demo (hardware version) on Genesis Plus GX

[Grandmaster9918]

Summary

Loaded Core: Genesis Plus GX
Loaded ROM hash:
TiTAN - Overdrive (Rev1.1-106-Final) (Hardware)
SHA1:4529D3CEFD204D6ACD9C7F2400F672E32C4EB797
MD5:2745E3DDD022D6F4A503C6D13356A0B5

Link to entire demo recorded from Emulator:
https://drive.google.com/file/d/1_S8mzbhIwJyh2cOlwDS33wyHPnIu3SAc/view?usp=sharing

Problems of this Demo, with Timestamps:

• 0:55, seems to be a slight wobbling of the overdrive logo up and down.
• 2:52, the robots and text that briefly flash before the “greetings to…”  sequence are not rendered in the proper color.
• During the Greetings to sequence, the PSG continues to sound in a subtle manner, but I think this occurs on hardware as well.
• 4:04: the transition from the moving checkerboards to the credits appears slightly incorrectly.
• 4:50, the borders of the Titan 512C Forever screen seem to be slightly glitched, especially on the left side.

Repro

1. Load ROM to emulator with Genesis Plus GX core
2. View output.

Host env.

• BizHawk 2.10, Windows 11, AMD64.

[ekeeke]

0:55 and 4:04 looks fine to me but maybe i am missing some details

2:52 and 4:50 might be due to some tiny timing regression (maybe related to addition of bus refresh delays) that make color RAM writes during hblank occuring slightly too late, as i am pretty sure it used to look fine in older version of the emulator

[Grandmaster9918]

Yes, the video was recorded in 240p, the whole demo rom is available online for free though.