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typos (nw)

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Lord-Nightmare 2018-05-09 02:55:08 -04:00
parent d381df490e
commit 04e8d3306f
1 changed files with 2 additions and 2 deletions
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src/mame/drivers/bublbobl.cpp
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@ -330,7 +330,7 @@ void bublbobl_state::subcpu_map(address_map &map)
1 0 1 0 x x x x x x x x x x x * RW YM3526 OPL chip
1 0 1 1 * * decoded by 74ls155@ic33
1 0 1 1 x x x x x x x x x x 0 0 R maincpu_to_sound latch 74ls374 @ic24 and clear maincpu_has_written semaphore
1 0 1 1 x x x x x x x x x x 0 0 W sound_to_maincpu latch 74ls374 @ic25 and set sound_has_written sempaphore
1 0 1 1 x x x x x x x x x x 0 0 W sound_to_maincpu latch 74ls374 @ic25 and set sound_has_written semaphore
1 0 1 1 x x x x x x x x x x 0 1 R read semaphores in d0 and d1
1 0 1 1 x x x x x x x x x x 0 1 W set latch to enable sound cpu nmi on maincpu_has_written semaphore active
1 0 1 1 x x x x x x x x x x 1 x R OPEN BUS
@ -339,7 +339,7 @@ void bublbobl_state::subcpu_map(address_map &map)
1 0 1 1 x x x x x x x x x x x 0 RW sound latch[2]
1 1 x x x x x x x x x x x x x x OPEN BUS
(1 1 * * * * * * * * * * * * * * R DIAGNOSTIC ROM[4])
[1] Technicaly A12 is conencted to the 6264 SRAM too, but the 74ls138 disables the SRAM when A12 is high, so only half is usable
[1] Technicaly A12 is connected to the 6264 SRAM too, but the 74ls138 disables the SRAM when A12 is high, so only half is usable
[4] While normally not populated (or even present? not shown on the schematic at all? possibly a holdover from tokio?)
the sound code probes for a ROM here, and will use it if found.
Sound cpu semaphores are both active low: