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https://github.com/holub/mame
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mc14411: NEW DEVICE Motorola MC14411 Bit Rate Generator
This commit is contained in:
Joakim Larsson Edstrom
parent
d7452d300a
commit
4af3d0ac83
@ -1574,6 +1574,18 @@ if (MACHINES["MC146818"]~=null) then
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}
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end
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---------------------------------------------------
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--
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--@src/devices/machine/mc14411.h,MACHINES["MC14411"] = true
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---------------------------------------------------
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if (MACHINES["MC14411"]~=null) then
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files {
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MAME_DIR .. "src/devices/machine/mc14411.cpp",
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MAME_DIR .. "src/devices/machine/mc14411.h",
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}
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end
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---------------------------------------------------
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--
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--@src/devices/machine/mc2661.h,MACHINES["MC2661"] = true
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@ -472,6 +472,7 @@ MACHINES["MB87078"] = true
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--MACHINES["MB8795"] = true
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MACHINES["MB89352"] = true
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MACHINES["MB89371"] = true
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--MACHINES["MC14411"] = true
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MACHINES["MC146818"] = true
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MACHINES["MC2661"] = true
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MACHINES["MC6843"] = true
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@ -461,6 +461,7 @@ MACHINES["MB87078"] = true
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MACHINES["MB8795"] = true
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MACHINES["MB89352"] = true
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MACHINES["MB89371"] = true
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MACHINES["MC14411"] = true
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MACHINES["MC146818"] = true
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MACHINES["MC2661"] = true
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MACHINES["MC6843"] = true
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217
src/devices/machine/mc14411.cpp
Normal file
217
src/devices/machine/mc14411.cpp
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@ -0,0 +1,217 @@
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// license:BSD-3-Clause
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// copyright-holders:Joakim Larsson Edstrom
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/*********************************************************************
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mc14411.cpp
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Motorola Bit Rate Generator
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This device assumed a fixed rate clock/crystal and does not support
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changing it through pin 21. All other features are implemented.
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*********************************************************************/
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#include "emu.h"
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#include "mc14411.h"
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/***************************************************************************
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MACROS
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***************************************************************************/
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//#define LOG_GENERAL (1U << 0) // Already defined in logmacro.h
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#define LOG_SETUP (1U << 1)
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//#define VERBOSE (LOG_GENERAL|LOG_SETUP)
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//#define LOG_OUTPUT_FUNC printf
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#include "logmacro.h"
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//#define LOG(...) LOGMASKED(LOG_GENERAL, __VA_ARGS__) // Already defined in logmacro.h
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#define LOGSETUP(...) LOGMASKED(LOG_SETUP, __VA_ARGS__)
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#ifdef _MSC_VER
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#define FUNCNAME __func__
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#define LLFORMAT "%I64d"
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#else
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#define FUNCNAME __PRETTY_FUNCTION__
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#define LLFORMAT "%lld"
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#endif
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/***************************************************************************
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LOCAL VARIABLES
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***************************************************************************/
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// 0/0 0/1 1/0 1/1 RSB/RSA
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// X1 X8 X16 X64
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const int mc14411_device::counter_divider[16][4] = {
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{ 192, 24, 12, 3 }, // F1
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{ 256, 32, 16, 4 }, // F2
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{ 384, 48, 24, 6 }, // F3
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{ 512, 64, 32, 8 }, // F4
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{ 768, 96, 48, 12 }, // F5
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{ 1024, 128, 64, 16 }, // F6
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{ 1536, 192, 96, 24 }, // F7
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{ 3072, 384, 192, 48 }, // F8
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{ 6144, 768, 384, 96 }, // F9
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{ 9216, 1152, 576, 144 }, // F10
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{ 12288, 1536, 768, 192 }, // F11
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{ 13696, 1712, 856, 214 }, // F12
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{ 16768, 2096, 1048, 262 }, // F13
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{ 24576, 3072, 1536, 384 }, // F14
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{ 2, 2, 2, 2 }, // F15
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{ 1, 1, 1, 1 } // F16
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};
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//**************************************************************************
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// DEVICE DEFINITIONS
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//**************************************************************************
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// device type definition
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DEFINE_DEVICE_TYPE(MC14411, mc14411_device, "mc14411", "MC14411 BRG")
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/***************************************************************************
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LIVE DEVICE
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***************************************************************************/
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mc14411_device::mc14411_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: mc14411_device(mconfig, MC14411, tag, owner, clock)
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{
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}
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mc14411_device::mc14411_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
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: device_t(mconfig, type, tag, owner, clock)
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, m_out_fx_cbs{*this, *this, *this, *this, *this, *this, *this, *this, *this, *this, *this, *this, *this, *this, *this, *this }
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, m_divider(0)
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, m_reset(CLEAR_LINE)
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{
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}
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//-------------------------------------------------
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// device_start - device-specific startup
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//-------------------------------------------------
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void mc14411_device::device_start()
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{
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LOGSETUP("%s\n", FUNCNAME);
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memset(m_fx_timer, '\0', sizeof(m_fx_timer));
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for (int i = F1; i <= F16; i++)
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{
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m_out_fx_cbs[i].resolve();
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if (!m_out_fx_cbs[i].isnull()) m_fx_timer[i] = timer_alloc(i);
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}
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save_item(NAME(m_divider));
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save_item(NAME(m_reset));
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m_reset_timer = timer_alloc(TIMER_ID_RESET);
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}
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//------------------------------------------------------------------------
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// device_reset - is called by the mame framework or by the owning device
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// driver or by ASSERTING the reset line through set_reset_line
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//------------------------------------------------------------------------
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void mc14411_device::device_reset()
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{
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LOGSETUP("%s\n", FUNCNAME);
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for (int i = F1; i <= F16; i++)
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{
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if (!m_out_fx_cbs[i].isnull())
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{
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// Reset line according to datasheet and remember it for transitions to come
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(m_out_fx_cbs[i])(m_fx_state[i] = (i < F15 ? 0 : 1));
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// Arm the timer based on the selected divider and the crystal value
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double hz = clock()/counter_divider[i][m_divider] * 2; // 2 flanks per cycle
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m_fx_timer[i]->adjust(attotime::from_hz(hz), i, attotime::from_hz(hz));
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LOGSETUP(" - arming timer for F%d at %fHz\n", i + 1, hz);
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}
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}
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if (m_reset == ASSERT_LINE)
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{
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m_reset_timer->adjust(attotime::from_nsec((double)900), TIMER_ID_RESET, attotime::from_nsec((double)900));
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}
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}
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//-------------------------------------------------
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// device_timer - handler timer events
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//-------------------------------------------------
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void mc14411_device::device_timer (emu_timer &timer, device_timer_id id, int32_t param, void *ptr)
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{
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switch(id)
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{
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case F1:
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case F2:
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case F3:
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case F4:
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case F5:
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case F6:
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case F7:
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case F8:
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case F9:
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case F10:
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case F11:
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case F12:
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case F13:
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case F14:
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case F15:
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case F16:
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(m_out_fx_cbs[id])(m_fx_state[id]++ & 1);
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break;
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case TIMER_ID_RESET:
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// NOTE: This check could be triggered by either faulty hardware design or non accurate emulation so is just informative if the reset line is handled
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// explicitelly instead of relying on calling device_reset
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if (!(m_reset == ASSERT_LINE))
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{
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LOG("Reset pulse is too short, should be 900nS minimum");
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logerror("Reset pulse is too short, should be 900nS minimum");
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}
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break;
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default:
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LOG("Unhandled Timer ID %d\n", id);
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break;
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}
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}
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//--------------------------------------------------------
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// rate_select_w - implements the RSA and RSB input pins
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// TODO: Needs to check real device behaviour how changing
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// divider at run time affects wave forms
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//--------------------------------------------------------
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WRITE8_MEMBER( mc14411_device::rate_select_w)
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{
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LOGSETUP("%s %02x\n", FUNCNAME, data);
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m_divider = data & 3;
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for (int i = F1; i <= F16; i++)
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{
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if (!m_out_fx_cbs[i].isnull())
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{
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// Re-arm the timer based on the new selected divider and the crystal value
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double hz = clock()/counter_divider[i][m_divider] * 2; // 2 flanks per cycle
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m_fx_timer[i]->adjust(attotime::from_hz(hz), i, attotime::from_hz(hz));
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LOGSETUP(" - Re-arming timer for F%d at %fHz\n", i + 1, hz);
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}
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}
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}
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//------------------------------------------------
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// reset_w - implements software controlled reset
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//------------------------------------------------
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WRITE_LINE_MEMBER( mc14411_device::reset_w)
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{
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LOGSETUP("%s %02x\n", FUNCNAME, state);
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m_reset = state;
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if (m_reset == ASSERT_LINE)
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{
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LOGSETUP(" - Asserting reset\n");
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device_reset();
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}
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else
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{
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LOGSETUP(" - Clearing reset\n");
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}
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}
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160
src/devices/machine/mc14411.h
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160
src/devices/machine/mc14411.h
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@ -0,0 +1,160 @@
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// license:BSD-3-Clause
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// copyright-holders:Joakim Larsson Edstrom
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/**********************************************************************
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*
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* Motorola MC14411 - bit rate generator. It utilizes a frequency divider
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* network to provide a wide range of output frequencies. A crystal controlled
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* oscillator is the clock source for the network. A 2 bit adress is used to
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* select one of four multiple output clock rates.
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*
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* - Single 5V sower supply
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* - Internal Oscillator Crystal Controlled for stability (1.8432 MHz)
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* - Sixteen Different Output Clock Rates
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* - 50% Output Duty Cycle
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* - Programmable Time Bases for one of four Multiple Output Rates
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* - Buffered Output compatible with low power TTL
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* - Noice immunity = 45% of VDD Typlical
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* - Diode protection on All Inputs
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* - External Clock may be applied to pin 21
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* - Internal pullup on reset input
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* _____ _____
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* F1 1 |* \_/ | 24 VDD
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* F3 2 | | 23 Rate Select A
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* F5 3 | | 22 Rate Select B
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* F7 4 | | 21 Xtal In
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* F8 5 | | 20 Xtal Out
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* F10 6 | | 19 F16
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* F9 7 | MC14411 | 18 F15
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* F11 8 | | 17 F2
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* F14 9 | | 16 F4
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* Reset* 10 | | 15 F6
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* Not Used 11 | | 14 F12
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* VSS 12 |_____________| 13 F13
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*
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*
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* +----------+-------Output Rates (Hz)-------+
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* | Output | Rate Select B and A pins |
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* | Number | X64 11| X16 10| X8 01 | X1 00 |
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* |----------+-------------------------------+
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* | Fl | 614.4k| 153.6k| 76.8k| 9600 |
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* | F2 | 46O.8k| 115.2k| 57.6k| 7200 |
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* | F3 | 3O7.2k| 76.8k| 38.4k| 4800 |
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* | F4 | 23O.4k| 57.6k| 28.8k| 3600 |
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* | F5 | 153.6k| 38.4k| 19.2k| 2400 |
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* | F6 | 115.2k| 28.8k| 14.4k| 1800 |
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* | F7 | 76.8k| 19.2k| 9600 | 1200 |
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* | FS | 38.4k| 9600 | 4800 | 600 |
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* | F9 | 19.2k| 4800 | 2400 | 300 |
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* | F1O | 12.8k| 3200 | 1600 | 200 |
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* | Fll | 9600 | 2400 | 1200 | 150 |
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* | F12 | 8613.2| 2153.3| 1076.6| 134.5|
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* | F13 | 7035.5| 1758.8| 879.4| 109.9|
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* | F14 | 4800 | 1200 | 600 | 75 |
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* | F15 | 921.6k| 921.6k| 921.6k| 921.6k|
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* | F16 | 1.843M| 1.843M| 1.843M| 1.843M|
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* +------------------------------------------+
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* - F16 is a buffered oscillator output
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*
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* The device is designed to work with 1.843MHz crystal so it is assumed that
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* an external clock source attached to pin 21 is also fixed thus not need to
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* interface through a callback interface.
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**********************************************************************/
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#ifndef MAME_MACHINE_MC14411_H
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#define MAME_MACHINE_MC14411_H
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#pragma once
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//**************************************************************************
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// DEVICE CONFIGURATION MACROS
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//**************************************************************************
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#define MCFG_MC14411_ADD(_tag, _clock) MCFG_DEVICE_ADD(_tag, MC14411, _clock)
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#define MCFG_MC14411_F1_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 0, DEVCB_##_devcb);
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#define MCFG_MC14411_F2_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 1, DEVCB_##_devcb);
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#define MCFG_MC14411_F3_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 2, DEVCB_##_devcb);
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#define MCFG_MC14411_F4_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 3, DEVCB_##_devcb);
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#define MCFG_MC14411_F5_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 4, DEVCB_##_devcb);
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#define MCFG_MC14411_F6_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 5, DEVCB_##_devcb);
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#define MCFG_MC14411_F7_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 6, DEVCB_##_devcb);
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#define MCFG_MC14411_F8_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 7, DEVCB_##_devcb);
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#define MCFG_MC14411_F9_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 8, DEVCB_##_devcb);
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#define MCFG_MC14411_F10_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 9, DEVCB_##_devcb);
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#define MCFG_MC14411_F11_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 10, DEVCB_##_devcb);
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#define MCFG_MC14411_F12_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 11, DEVCB_##_devcb);
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#define MCFG_MC14411_F13_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 12, DEVCB_##_devcb);
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#define MCFG_MC14411_F14_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 13, DEVCB_##_devcb);
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#define MCFG_MC14411_F15_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 14, DEVCB_##_devcb);
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#define MCFG_MC14411_F16_CB(_devcb) devcb = &mc14411_device::set_out_fx_cb(*device, 15, DEVCB_##_devcb);
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#define MCFG_MC14411_RSA 0x01
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#define MCFG_MC14411_RSB 0x02
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//**************************************************************************
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// TYPE DEFINITIONS
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//**************************************************************************
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class mc14411_device : public device_t
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{
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public:
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// construction/destruction
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mc14411_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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template <class Object> static devcb_base &set_out_fx_cb(device_t &device, int index, Object &&cb) { return downcast<mc14411_device &>(device).m_out_fx_cbs[index].set_callback(std::forward<Object>(cb)); }
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DECLARE_WRITE_LINE_MEMBER(reset_w);
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DECLARE_WRITE8_MEMBER(rate_select_w);
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protected:
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mc14411_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
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// device-level overrides
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virtual void device_start() override;
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virtual void device_reset() override;
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virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
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private:
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// timers
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enum // indexes
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{
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F1 = 0,
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F2 = 1,
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F3 = 2,
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F4 = 3,
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F5 = 4,
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F6 = 5,
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F7 = 6,
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F8 = 7,
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F9 = 8,
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F10 = 9,
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F11 = 10,
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F12 = 11,
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F13 = 12,
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F14 = 13,
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F15 = 14,
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F16 = 15
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};
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emu_timer *m_fx_timer[16];
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enum
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{
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TIMER_ID_RESET = 16
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};
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emu_timer *m_reset_timer;
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// F1-F16 Output line states
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uint32_t m_fx_state[16];
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// divider matrix
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static const int counter_divider[16][4];
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devcb_write_line m_out_fx_cbs[16];
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uint32_t m_divider; // main divider to use, 0-3 column index into counter_divider
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uint32_t m_reset; // Reset line state
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};
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// device type definition
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DECLARE_DEVICE_TYPE(MC14411, mc14411_device)
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#endif // MAME_MACHINE_MC14411_H
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