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Fixed the Noraut Poker discrete sound system. Rerouted the PPI-1 lines PC5 & PC6. Now the scheme has more sense from a hardware point of view. All sounds are now accurate based on real references. Also corrected the original diagram.

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This commit is contained in:
Roberto Fresca 2009-09-10 08:01:59 +00:00
parent 6051f45409
commit 90cda3eb32
2 changed files with 14 additions and 4 deletions
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4
src/mame/audio/norautp.c
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@ -15,8 +15,8 @@
#define NORAUTP_R2 RES_K(2.2) #define NORAUTP_R2 RES_K(2.2)
/* Parts List - Capacitors */ /* Parts List - Capacitors */
#define NORAUTP_C1 CAP_U(.022) #define NORAUTP_C1 CAP_U(.009) /* The real value is .01, but using .009 the tone for this line is accurate */
#define NORAUTP_C2 CAP_U(.01) #define NORAUTP_C2 CAP_U(.022)
#define NORAUTP_C3 CAP_U(.047) #define NORAUTP_C3 CAP_U(.047)
#define NORAUTP_C4 CAP_U(.01) #define NORAUTP_C4 CAP_U(.01)

14
src/mame/drivers/norautp.c
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@ -17,6 +17,10 @@
* Noraut Poker (bootleg), 198?, Unknown. * Noraut Poker (bootleg), 198?, Unknown.
Special thanks to Alan Griffin, that kindly helped providing good references
that allowed me to improve the system emulation.
******************************************************************************* *******************************************************************************
@ -250,8 +254,8 @@
R2 = 2.2 K ; Tolerance +/- 5% R2 = 2.2 K ; Tolerance +/- 5%
R3 = 1 K ; Tolerance +/- 5% R3 = 1 K ; Tolerance +/- 5%
C1 = 223J = 22000 pF = 22 nF = 0.022 uF ; Tolerance +/- 5% C1 = 103J = 10000 pF = 10 nF = 0.01 uF ; Tolerance +/- 5%
C2 = 103J = 10000 pF = 10 nF = 0.01 uF ; Tolerance +/- 5% C2 = 223J = 22000 pF = 22 nF = 0.022 uF ; Tolerance +/- 5%
C3 = 473J = 47000 pF = 47 nF = 0.047 uF ; Tolerance +/- 5% C3 = 473J = 47000 pF = 47 nF = 0.047 uF ; Tolerance +/- 5%
C4 = 103J = 10000 pF = 10 nF = 0.01 uF ; Tolerance +/- 5% C4 = 103J = 10000 pF = 10 nF = 0.01 uF ; Tolerance +/- 5%
@ -514,6 +518,12 @@
It has 2 jumpers that cut the a14 and a15 addressing lines. It has 2 jumpers that cut the a14 and a15 addressing lines.
[2009-09-09]
- Added accurate discrete sound system emulation.
- Fixed the discrete sound system diagram, based on real sound references.
TODO: TODO:
- Analize PPI-2 at 0xc0-0xc3. OBF handshake line (PC7) doesn't seems to work properly. - Analize PPI-2 at 0xc0-0xc3. OBF handshake line (PC7) doesn't seems to work properly.