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sequential/sixtrak.cpp: Added pre-initialized NVRAMs. #14548

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Nov 19, 2025
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sequential/sixtrak.cpp: Added pre-initialized NVRAMs. #14548

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38 changes: 25 additions & 13 deletions src/mame/sequential/sixtrak.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -50,8 +50,15 @@ This driver is based on the service manual for the Six-Trak (probably Rev C),
and is intended as an educational tool.


When the RAM is not initialized, all programs will be silent, the synth will be
out of tune, and the pitch wheel will not be calibrated.
*** Tuning and initialization ***

If the NVRAM images are present in the .zip file, the synth will be initialized
to factory settings. The initialization steps below will not be required.

The NVRAM images are optional. If not present, all programs will be silent, the
synth will be out of tune, and the pitch wheel will not be calibrated. To tune
and calibrate, see below. In this case, patches will need to be programmed
manually or configured via MIDI SYSEX.

A basic test patch can be configured by pressing:
CONTROL RECORD + SELECT 8 (C + NUMPAD 8)
Expand Down Expand Up @@ -736,10 +743,9 @@ u64 sixtrak_state::iorq_wait_state(offs_t offset, u64 current_time)

void sixtrak_state::memory_map(address_map &map)
{
map(0x0000, 0x3fff).rom();
map(0x4000, 0x47ff).ram().share("nvram1");
map(0x4800, 0x4fff).ram().share("nvram2");
map(0x5000, 0x57ff).mirror(0x0800).ram().share("nvram3");
map(0x0000, 0x3fff).rom(); // U128 (27128)
map(0x4000, 0x4fff).ram().share("nvram_a"); // U119, U117 (6116)
map(0x5000, 0x57ff).mirror(0x0800).ram().share("nvram_b"); // U112 (6116)
map(0x6000, 0x6001).mirror(0x1ffe).w("midiacia", FUNC(acia6850_device::write));
map(0xe000, 0xe001).mirror(0x1ffe).r("midiacia", FUNC(acia6850_device::read));
}
Expand Down Expand Up @@ -798,9 +804,8 @@ void sixtrak_state::sixtrak(machine_config &config)
m_maincpu->set_addrmap(AS_PROGRAM, &sixtrak_state::memory_map);
m_maincpu->set_addrmap(AS_IO, &sixtrak_state::io_map);

NVRAM(config, "nvram1", nvram_device::DEFAULT_ALL_0); // U119 (6116)
NVRAM(config, "nvram2", nvram_device::DEFAULT_ALL_0); // U117 (6116)
NVRAM(config, "nvram3", nvram_device::DEFAULT_ALL_0); // U112 (6116)
NVRAM(config, "nvram_a", nvram_device::DEFAULT_ALL_0); // U119, U117 (6116)
NVRAM(config, "nvram_b", nvram_device::DEFAULT_ALL_0); // U112 (6116)

PIT8253(config, m_pit); // U133
m_pit->set_clk<1>(8_MHz_XTAL / 4); // U134 (74LS93), QB.
Expand Down Expand Up @@ -1111,14 +1116,21 @@ INPUT_PORTS_END

// The firmware version can be displayed by pressing RECORD TRACK and SELECT 5.
ROM_START(sixtrak)
ROM_REGION(0x4000, "maincpu", 0) // U128 (27128)
ROM_DEFAULT_BIOS("v11")

ROM_SYSTEM_BIOS(0, "v11", "Six-Trak V11 (1985)") // Last official release.
ROMX_LOAD("trak-11.bin", 0x000000, 0x004000, CRC(4d361d4f) SHA1(f14d4291c1a6a3e9462ae9786641cef11a9aac9a), ROM_BIOS(0))

ROM_SYSTEM_BIOS(1, "v9", "Six-Trak V9")

ROM_REGION(0x4000, "maincpu", 0) // U128 (27128)
ROMX_LOAD("trak-11.bin", 0x000000, 0x004000, CRC(4d361d4f) SHA1(f14d4291c1a6a3e9462ae9786641cef11a9aac9a), ROM_BIOS(0))
ROMX_LOAD("trak-9.bin", 0x000000, 0x004000, CRC(d1e6261c) SHA1(bdad57290c24a9ce02c3a5161f8d12f8f96fc74a), ROM_BIOS(1))

ROM_REGION(0x1000, "nvram_a", ROMREGION_ERASE00)
ROMX_LOAD("nvram_a-11.bin", 0x000000, 0x001000, CRC(e36e5a14) SHA1(e31fc4fb23ddb34374c785233980023e01a4bffa), ROM_BIOS(0) | ROM_OPTIONAL)
ROMX_LOAD("nvram_a-9.bin", 0x000000, 0x001000, CRC(4dac5eea) SHA1(7afd40b7a79ac0d9e8f081766391232354fb7028), ROM_BIOS(1) | ROM_OPTIONAL)

ROM_REGION(0x800, "nvram_b", ROMREGION_ERASE00)
ROMX_LOAD("nvram_b-11.bin", 0x000000, 0x000800, CRC(ea2e2fb9) SHA1(d70bf42adf33b2e9970ffd5f1ef3e57217ce349d), ROM_BIOS(0) | ROM_OPTIONAL)
ROMX_LOAD("nvram_b-9.bin", 0x000000, 0x000800, CRC(ea2e2fb9) SHA1(d70bf42adf33b2e9970ffd5f1ef3e57217ce349d), ROM_BIOS(1) | ROM_OPTIONAL)
ROM_END

} // anonymous namespace
Expand Down
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