diff options
| author | 2019-09-21 15:55:05 -0500 | |
|---|---|---|
| committer | 2019-09-21 15:55:05 -0500 | |
| commit | 7e94f7cfa0808dc843af5fb41b6cee5307bfca6a (patch) | |
| tree | 5372cdd1378414912d3d3ced7f158486654b431e /src | |
| parent | 8734df72ea0b69f6b327f2a088291498b8cb0517 (diff) | |
(nw) segabill.cpp: 8MHz rated Z80, so change clock. Also document OSC + whitespace
Diffstat (limited to 'src')
| -rw-r--r-- | src/mame/machine/segabill.cpp | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/src/mame/machine/segabill.cpp b/src/mame/machine/segabill.cpp index b9af8fa3f23..501e72edf52 100644 --- a/src/mame/machine/segabill.cpp +++ b/src/mame/machine/segabill.cpp @@ -24,26 +24,26 @@ Sega VERSUS CITY BILLBOARD CONTROL BD 837-11854 (C) 1991 |-- 74F74N M74LS393P HD74HC4040P 315-5338A | | | | z -- | -| 8 M27C512 C|| | +| 8 M27C512 32.000MHz C|| | | 0 LH5268AD N|| | | 2|| | | GAL16V8B SN74LS32N SN74LS04N MB3771 -- | | LED | |-----------------------------------------------------------------------------| - Setup: - Z80 ZILOG Z0840008PSC Z80 CPU (DIP40) - LH5268A SHARP LH5268AD-10LL 8k x8 SRAM (DIP28, labeled as MB8464A-15LL on PCB silkscreen) - PS2501 NEC PS2501-4 ISOLATOR (DIP16) - M54583P MITSUBISHI M54583P DARLINGTON TRANSISTOR ARRAY (DIP18) - 74F74N PHILLIPS 74F74N DUAL D-TYPE FLIP-FLIP (DIP14) - M74LS393P MITSUBISHI M74LS393P DUAL BINARY COUNTER (DIP14) - HD74HC4040P RENESAS HD74HC4040P 12-STAGE BINARY COUNTER (DIP16) - 315-5338A SEGA CUSTOM (QFP100) - M27C512 ST MICROELECTRONICS M27C512-15F1 (DIP28, labeled 'EPR-18022', socketed) - GAL16V8B LATTICE GAL16V8B-25LP HIGH PERFORMANCE E2CMOS PLD GENERIC ARRAY LOGIC (DIP28, socketed) - SN74LS32N MOTOROLA SN74LS32N QUAD 2-INPUT OR GATE (DIP14) - SN74LS04N MOTOROLA SN74LS04N HEX INVERTER (DIP14) - MB3771 FUJITSU MB3771 POWER SUPPLY VOLTAGE MONITOR (SOP8) + Setup: + Z80 ZILOG Z0840008PSC Z80 CPU (DIP40) + LH5268A SHARP LH5268AD-10LL 8k x8 SRAM (DIP28, labeled as MB8464A-15LL on PCB silkscreen) + PS2501 NEC PS2501-4 ISOLATOR (DIP16) + M54583P MITSUBISHI M54583P DARLINGTON TRANSISTOR ARRAY (DIP18) + 74F74N PHILLIPS 74F74N DUAL D-TYPE FLIP-FLIP (DIP14) + M74LS393P MITSUBISHI M74LS393P DUAL BINARY COUNTER (DIP14) + HD74HC4040P RENESAS HD74HC4040P 12-STAGE BINARY COUNTER (DIP16) + 315-5338A SEGA CUSTOM (QFP100) + M27C512 ST MICROELECTRONICS M27C512-15F1 (DIP28, labeled 'EPR-18022', socketed) + GAL16V8B LATTICE GAL16V8B-25LP HIGH PERFORMANCE E2CMOS PLD GENERIC ARRAY LOGIC (DIP28, socketed) + SN74LS32N MOTOROLA SN74LS32N QUAD 2-INPUT OR GATE (DIP14) + SN74LS04N MOTOROLA SN74LS04N HEX INVERTER (DIP14) + MB3771 FUJITSU MB3771 POWER SUPPLY VOLTAGE MONITOR (SOP8) Board: 837-11854 Sega VERSUS CITY BILLBOARD CONTROL BD EEPROM: @@ -148,7 +148,7 @@ const tiny_rom_entry *sega_billboard_device::device_rom_region() const void sega_billboard_device::device_add_mconfig(machine_config &config) { - Z80(config, m_billcpu, 32_MHz_XTAL / 8); // divisor guessed + Z80(config, m_billcpu, 32_MHz_XTAL / 4); // Z0840008PSC 8MHz rated part - not verified m_billcpu->set_addrmap(AS_PROGRAM, &sega_billboard_device::mem_map); m_billcpu->set_addrmap(AS_IO, &sega_billboard_device::io_map); m_billcpu->set_periodic_int(FUNC(sega_billboard_device::irq0_line_hold), attotime::from_hz(32_MHz_XTAL/65536)); // timing? |
