Jinxiu Zhonghua (jxzh, bmc/koftball.cpp) issues

[cuavas]

@Osso13 was interested in discussing and possibly addressing some of the emulation issues with Jinxiu Zhonghua, so here’s a discussion for it.

The simplest way to trigger a graphical issue is to let the game boot, the press the Bookkeeping key (zero on the keyboard by default) – the background isn’t erased. You can dismiss the statistics screen by pressing the Bookkeeping key again.

The tiles for the type A Last Chance game are invisible (possibly drawn with the wrong priority), only the cursor for selecting a tile is visible. I’ve attached a suitable configuration file and save state for observing this (created with mamedev/mame@64e57e1). Start mame jxzh -state lastchance then press Start a couple of times to draw and discard a tile, and you’ll get the invisible Last Chance game.
jxzh-lastchance.zip