diff options
Diffstat (limited to 'src/devices/cpu')
-rw-r--r-- | src/devices/cpu/h6280/h6280.cpp | 6 | ||||
-rw-r--r-- | src/devices/cpu/h6280/h6280.h | 5 |
2 files changed, 8 insertions, 3 deletions
diff --git a/src/devices/cpu/h6280/h6280.cpp b/src/devices/cpu/h6280/h6280.cpp index 32c7a0578fa..02450ff10d2 100644 --- a/src/devices/cpu/h6280/h6280.cpp +++ b/src/devices/cpu/h6280/h6280.cpp @@ -176,6 +176,7 @@ h6280_device::h6280_device(const machine_config &mconfig, const char *tag, devic , m_port_in_cb(*this) , m_port_out_cb(*this) , m_psg(*this, "psg") + , m_timer_scale(1) { // build the opcode table for (int op = 0; op < 256; op++) @@ -344,7 +345,7 @@ void h6280_device::device_reset() /* timer off by default */ m_timer_status = 0; - m_timer_load = 128 * 1024; + m_timer_load = 128 * 1024 * m_timer_scale; m_irq_pending = 0; } @@ -2571,9 +2572,8 @@ WRITE8_MEMBER( h6280_device::timer_w ) switch (offset & 1) { case 0: /* Counter preload */ - //m_timer_load = m_timer_value = ((data & 127) + 1) * 1024; // matches HW behaviour, value is latched only with 0->1 counter enable transition - m_timer_load = ((data & 127) + 1) * 1024; + m_timer_load = ((data & 127) + 1) * 1024 * m_timer_scale; return; case 1: /* Counter enable */ diff --git a/src/devices/cpu/h6280/h6280.h b/src/devices/cpu/h6280/h6280.h index 5e45a0fe7b9..86483beca98 100644 --- a/src/devices/cpu/h6280/h6280.h +++ b/src/devices/cpu/h6280/h6280.h @@ -41,6 +41,9 @@ public: auto port_in_cb() { return m_port_in_cb.bind(); } // K0-7 at Pinout auto port_out_cb() { return m_port_out_cb.bind(); } // O0-7 at Pinout + // hack to fix music speed in some Data East games (core bug, external strapping, DE 45 customization or ???) + void set_timer_scale(int scale) { m_timer_scale = scale; } + /* functions for use by the PSG and joypad port only! */ uint8_t io_get_buffer(); void io_set_buffer(uint8_t); @@ -374,6 +377,8 @@ protected: // other internal states int m_icount; + uint8_t m_timer_scale; + // address spaces address_space *m_program; address_space *m_io; |