jotego / jts16

FPGA core compatible with System 16 hardware

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[goldnaxe1] game locks in stage 2

jotego opened this issue · comments

If the enemy is pushed off the cliff, the game doesn't let you advance. The go sign never shows up. Slashing the enemy lets you advance. Either killing method is ok in MAME.

0001

Music gets corrupted too.

First seen in 7dc5bde

Golden Axe (set 1, World) (FD1094 317-0110) - Crash (tested 2 times)
Golden Axe (set 2, US) (8751 317-0112) - No crash (tested 3 times)
Golden Axe (set 3, World) (FD1094 317-0120) - No crash (tested 1 time)
Golden Axe (set 4, Japan) (FD1094 317-0121) - No crash (tested 1 time)
Golden Axe (set 5, US) (FD1094 317-0122) - Crash (tested 1 time)

i tried set 6 US version with ax battler, pushing off cliff with shoulder - no crash (2 times tested)

  • It locks even with git co 8072eb3 -- jtframe_68kdtack.v on JTFRAME
  • It also locks in ac1f52e
  • and 8ed2020
  • and 8ab1e80
  • and 8bc7bb3, which was the first commit that supported Golden Axe
    This bug has always been there

Retested in 29152a4 after the improved jtframe_68kdtack. It still happens.

Fixed in 40b01df
The /IPL2 interrupt line was latched, but it shouldn't be