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Lucky Ball 96: Documented the I/O circuitry

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(PPI 8255 + 3x 4099 + 3x 4512) [Roberto Fresca]
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RobertoFresca 2018-01-08 14:53:08 -03:00
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src/mame/drivers/luckybal.cpp
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@ -40,6 +40,45 @@
Samples are 8-bit unsigned PCM. Samples are 8-bit unsigned PCM.
*********************************************************************
I/O:
1x PPI 8255.
3x 4099 (8-Bit Addressable Latch).
3x 4512 (8-Channel Data Selector).
PPI 8255
.------v------.
| PA0 |------> DAC (D7)
| PA1 |------> DAC (D6)
| PA2 |------> DAC (D5)
| PA3 |------> DAC (D4)
| PA4 |------> DAC (D3)
| PA5 |------> DAC (D2)
| PA6 |------> DAC (D1)
| PA7 |------> DAC (D0)
| |
| PB0 |------> I/O 4099 (A0) & 4512 (A)
| PB1 |------> I/O 4099 (A1) & 4512 (B)
| PB2 |------> I/O 4099 (A2) & 4512 (C)
| PB3 |------> I/O 4099 (WD 4099 #0, Players)
| PB4 |------> I/O 4099 (WD 4099 #1, Counters)
| PB5 |------> I/O 4099 (WD 4099 #2, unknown)
| PB6 |------> I/O 4099 (D)
| PB7 |------> PB7
| |
| PC0 |------> EEPROM (DI)
| PC1 |------> EEPROM (CS)
| PC2 |------> EEPROM (SK)
| PC3 |------\ tied together
| PC4 |------/ to PC3.
| PC5 |------> I/O 4512 #0 (SO, inputs #0)
| PC6 |------> I/O 4512 #1 (SO, inputs #1)
| PC7 |------> I/O 4512 #2 (SO, DIP switches)
'-------------'
*********************************************************************/ *********************************************************************/