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author Michaël Banaan Ananas <happppp@users.noreply.github.com>2013-11-03 19:27:24 +0000
committer Michaël Banaan Ananas <happppp@users.noreply.github.com>2013-11-03 19:27:24 +0000
commitb5091762d7dbc22a8130f23a47d5c3dd84cc292b (patch)
tree05d2a524b9a0f5b8541ae037c33abc7341f7edae /src/mame/drivers/mazerbla.c
parent6086201c515a5cd1182bdc9de2bb722a659983fa (diff)
update note
Diffstat (limited to 'src/mame/drivers/mazerbla.c')
-rw-r--r--src/mame/drivers/mazerbla.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/src/mame/drivers/mazerbla.c b/src/mame/drivers/mazerbla.c
index 67f63a3f163..676ecd7bb65 100644
--- a/src/mame/drivers/mazerbla.c
+++ b/src/mame/drivers/mazerbla.c
@@ -1361,10 +1361,11 @@ IRQ_CALLBACK_MEMBER(mazerbla_state::irq_callback)
/* D1 is set to GND when INT comes from CFB */
/* D2 is set to GND when INT comes from ZPU board - from 6850 on schematics (RS232 controller) */
- /* resulting vectors:
- 1111 11000 (0xf8) - results in same as 0xfc
- 1111 11010 (0xfa) - does nothing
- 1111 11100 (0xfc) - calls several routines
+ /* resulting vectors: - effect according to disasm:
+ --------------------------------------------------------
+ 1111 11000 (0xf8) - results in same as 0xfc
+ 1111 11010 (0xfa) - does nothing, assume it was used for debugging
+ 1111 11100 (0xfc) - calls several routines
note:
1111 11110 (0xfe) - cannot happen and is not handled by game */