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Merge pull request #262 from ensjo/patch-1

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NE555 timing fixed, cleaner schematics found.
This commit is contained in:
R. Belmont 2015-08-28 12:57:37 -04:00
commit 0c51a75f3f
1 changed files with 6 additions and 6 deletions
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12
src/mess/drivers/mc1000.c
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@ -378,7 +378,7 @@ void mc1000_state::machine_reset()
+---------*---*---o V+ +---------*---*---o V+
| | | | | |
+-+ | | +-+ | |
| |309K | | | |390K | |
| |R17 |8 |4 | |R17 |8 |4
+-+ +-------+ +-+ +-------+
| 7| |3 | 7| |3
@ -390,23 +390,23 @@ void mc1000_state::machine_reset()
| | | | 555 | | | | | 555 |
+-+ | | | +-+ | | |
| | 6| |5 | | 6| |5
*----*?-| |---+ *----*--| |---+
| | | | | | | |
---C30 +-------+ ---C29 ---C30 +-------+ ---C29
---103 |1 ---103 ---10n |1 ---10n
_|_ _|_ _|_ _|_ _|_ _|_
/// /// /// /// /// ///
Calculated properties: Calculated properties:
* 99.74489795918367 Duty Cycle Percentage * 99.74489795918367 Duty Cycle Percentage
* 368.1126130105722 Frequency in Hertz * 367.3469387755102 Frequency in Hertz
* 0.00000693 Seconds Low * 0.00000693 Seconds Low
* 0.0027096299999999998 Seconds High * 0.00270963 Seconds High
*/ */
#define MC1000_NE555_FREQ (368) /* Hz */ #define MC1000_NE555_FREQ (367) /* Hz */
#define MC1000_NE555_DUTY_CYCLE (99.745) /* % */ #define MC1000_NE555_DUTY_CYCLE (99.745) /* % */
TIMER_DEVICE_CALLBACK_MEMBER(mc1000_state::ne555_tick) TIMER_DEVICE_CALLBACK_MEMBER(mc1000_state::ne555_tick)