Incorrect arrow behaviour.

[Lyriell]

Arrows visually pass through shields when the enemies block them and sometimes hit the enemy balloons behind them.

Also, after they block arrows, sometimes when you try and shoot, the arrow will show downwards instead of across the screen.

Have reproduced this multiple times in vertical mode using VGA

[sorgelig]

Are you sure it's not a bug in ROM?

[Lyriell]

Deleted the rom and redownloaded using the retrodriver script, and it still occurs. (not very often)
Replaced it with a mame 219 version I use (which works in mame)

The easiest way to see this is when shooting against the alpha wolf on the later levels, as he will deflect often. If you jam away at the shoot, sometimes your 2nd arrow will fly straight down.

Didn't have any issues with the arrow passing through side update though. Will test later this evening and report back.

I can take some video and upload if you like.... I think it happens when your second arrow leaves at the same time as the deflection occurs (not sure if pressing down on the joystick matter) but I suspect it is applying the direction of the arrow to both arrows

[sorgelig]

I mean the bug can be a "feature" of original ROM.

[Lyriell]

Have spent some time with the rom in the latest version of MAME and it does not behave in this manner. Seems to be an inconsistency.

No biggie, just makes the game very difficult later on,

[sorgelig]

may be original author @darfpga can look into this issue

[darfpga]

I will have look. I'd like to have video if possible. Please also leave CRC of all roms. Did you try Mame with these exact ROM set?

[darfpga]

Issue fixed by using rev 350 of t80. Pull request with new released done

[darfpga]

pull request #9

[sorgelig]

great!