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mos6530l: remove unused device
This commit is contained in:
hap
parent
9a8c1f6564
commit
e51d95f08c
3 changed files with 0 additions and 489 deletions
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@ -2554,18 +2554,6 @@ if (MACHINES["MOS6529"]~=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/mos6530l.h,MACHINES["MOS6530L"] = true
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---------------------------------------------------
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if (MACHINES["MOS6530L"]~=null) then
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files {
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MAME_DIR .. "src/devices/machine/mos6530l.cpp",
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MAME_DIR .. "src/devices/machine/mos6530l.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/mos6530n.h,MACHINES["MOS6530"] = true
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@ -1,370 +0,0 @@
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// license:BSD-3-Clause
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// copyright-holders:Curt Coder
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/***************************************************************************
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MOS 6530 MIOT emulation
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Memory, I/O, Timer Array (Rockwell calls it RRIOT: ROM, RAM, I/O, Timer)
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The timer seems to follow these rules:
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- When the timer flag changes from 0 to 1 the timer continues to count
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down at a 1 cycle rate.
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- When the timer is being read or written the timer flag is reset.
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- When the timer flag is set and the timer contents are 0, the counting
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stops.
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From the operation of the KIM1 it expects the irqflag to be set whenever
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the unit is reset. This is something that is not clear from the datasheet
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and should be verified against real hardware.
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***************************************************************************/
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#include "emu.h"
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#include "mos6530l.h"
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/***************************************************************************
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CONSTANTS
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***************************************************************************/
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enum
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{
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TIMER_IDLE,
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TIMER_COUNTING,
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TIMER_FINISHING
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};
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#define TIMER_FLAG 0x80
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/***************************************************************************
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DEVICE INTERFACE
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***************************************************************************/
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DEFINE_DEVICE_TYPE(MOS6530L, mos6530l_device, "mos6530l", "MOS 6530 MIOT L")
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mos6530l_device::mos6530l_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
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device_t(mconfig, MOS6530L, tag, owner, clock),
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m_in_pa_cb(*this, 0),
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m_out_pa_cb(*this),
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m_in_pb_cb(*this, 0),
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m_out_pb_cb(*this)
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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 mos6530l_device::device_start()
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{
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/* set static values */
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m_clock = clock();
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/* allocate timers */
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m_timer = timer_alloc(FUNC(mos6530l_device::end_state), this);
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/* register for save states */
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save_item(NAME(m_port[0].m_in));
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save_item(NAME(m_port[0].m_out));
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save_item(NAME(m_port[0].m_ddr));
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save_item(NAME(m_port[1].m_in));
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save_item(NAME(m_port[1].m_out));
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save_item(NAME(m_port[1].m_ddr));
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save_item(NAME(m_irqstate));
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save_item(NAME(m_irqenable));
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save_item(NAME(m_timershift));
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save_item(NAME(m_timerstate));
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}
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//-------------------------------------------------
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// device_reset - device-specific reset
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//-------------------------------------------------
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void mos6530l_device::device_reset()
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{
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/* reset I/O states */
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m_port[0].m_out = 0;
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m_port[0].m_ddr = 0;
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m_port[1].m_out = 0;
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m_port[1].m_ddr = 0;
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/* reset IRQ states */
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m_irqenable = 0;
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m_irqstate = TIMER_FLAG;
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update_irqstate();
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/* reset timer states */
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m_timershift = 0;
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m_timerstate = TIMER_IDLE;
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m_timer->adjust(attotime::never);
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}
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/***************************************************************************
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TYPE DEFINITIONS
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***************************************************************************/
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/*-------------------------------------------------
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update_irqstate - update the IRQ state
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based on interrupt enables
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-------------------------------------------------*/
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void mos6530l_device::update_irqstate()
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{
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uint8_t out = m_port[1].m_out;
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if (m_irqenable)
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out = ((m_irqstate & TIMER_FLAG) ? 0x00 : 0x80) | (out & 0x7F);
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m_out_pb_cb((offs_t)0, out);
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}
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/*-------------------------------------------------
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get_timer - return the current timer value
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-------------------------------------------------*/
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uint8_t mos6530l_device::get_timer()
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{
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/* if idle, return 0 */
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if (m_timerstate == TIMER_IDLE)
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return 0;
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/* if counting, return the number of ticks remaining */
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else if (m_timerstate == TIMER_COUNTING)
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return m_timer->remaining().as_ticks(m_clock) >> m_timershift;
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/* if finishing, return the number of ticks without the shift */
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else
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return m_timer->remaining().as_ticks(m_clock);
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}
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/***************************************************************************
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INTERNAL FUNCTIONS
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***************************************************************************/
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/*-------------------------------------------------
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end_state - callback to process the timer
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-------------------------------------------------*/
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TIMER_CALLBACK_MEMBER(mos6530l_device::end_state)
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{
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assert(m_timerstate != TIMER_IDLE);
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/* if we finished counting, switch to the finishing state */
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if (m_timerstate == TIMER_COUNTING)
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{
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m_timerstate = TIMER_FINISHING;
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m_timer->adjust(attotime::from_ticks(256, m_clock));
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/* signal timer IRQ as well */
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m_irqstate |= TIMER_FLAG;
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update_irqstate();
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}
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/* if we finished finishing, switch to the idle state */
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else if (m_timerstate == TIMER_FINISHING)
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{
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m_timerstate = TIMER_IDLE;
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m_timer->adjust(attotime::never);
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}
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}
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/***************************************************************************
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I/O ACCESS
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***************************************************************************/
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/*-------------------------------------------------
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mos6530_w - master I/O write access
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-------------------------------------------------*/
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void mos6530l_device::write(offs_t offset, uint8_t data)
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{
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/* if A2 == 1, we are writing to the timer */
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if (offset & 0x04)
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{
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static const uint8_t timershift[4] = { 0, 3, 6, 10 };
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attotime curtime = machine().time();
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int64_t target;
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/* A0-A1 contain the timer divisor */
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m_timershift = timershift[offset & 3];
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/* A3 contains the timer IRQ enable */
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if (offset & 8)
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m_irqenable |= TIMER_FLAG;
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else
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m_irqenable &= ~TIMER_FLAG;
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/* writes here clear the timer flag */
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if (m_timerstate != TIMER_FINISHING || get_timer() != 0xff)
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m_irqstate &= ~TIMER_FLAG;
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update_irqstate();
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/* update the timer */
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m_timerstate = TIMER_COUNTING;
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target = curtime.as_ticks(m_clock) + 1 + (data << m_timershift);
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m_timer->adjust(attotime::from_ticks(target, m_clock) - curtime);
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}
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/* if A2 == 0, we are writing to the I/O section */
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else
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{
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/* A1 selects the port */
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mos6530_port *port = &m_port[BIT(offset, 1)];
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/* if A0 == 1, we are writing to the port's DDR */
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if (offset & 1)
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port->m_ddr = data;
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/* if A0 == 0, we are writing to the port's output */
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else
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{
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uint8_t olddata = port->m_out;
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port->m_out = data;
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if ((offset & 2) && m_irqenable)
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{
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olddata = ((m_irqstate & TIMER_FLAG) ? 0x00 : 0x80) | (olddata & 0x7F);
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data = ((m_irqstate & TIMER_FLAG) ? 0x00 : 0x80) | (data & 0x7F);
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}
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if (!BIT(offset, 1))
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m_out_pa_cb((offs_t)0, data);
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else
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m_out_pb_cb((offs_t)0, data);
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}
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}
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}
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/*-------------------------------------------------
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mos6530_r - master I/O read access
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-------------------------------------------------*/
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uint8_t mos6530l_device::read(offs_t offset)
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{
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uint8_t val;
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/* if A2 == 1 and A0 == 1, we are reading interrupt flags */
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if ((offset & 0x05) == 0x05)
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{
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val = m_irqstate;
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}
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/* if A2 == 1 and A0 == 0, we are reading the timer */
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else if ((offset & 0x05) == 0x04)
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{
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val = get_timer();
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/* A3 contains the timer IRQ enable */
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if (offset & 8)
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m_irqenable |= TIMER_FLAG;
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else
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m_irqenable &= ~TIMER_FLAG;
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/* implicitly clears the timer flag */
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if (m_timerstate != TIMER_FINISHING || val != 0xff)
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m_irqstate &= ~TIMER_FLAG;
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update_irqstate();
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}
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/* if A2 == 0 and A0 == anything, we are reading from ports */
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else
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{
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/* A1 selects the port */
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mos6530_port *port = &m_port[BIT(offset, 1)];
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/* if A0 == 1, we are reading the port's DDR */
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if (offset & 1)
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val = port->m_ddr;
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/* if A0 == 0, we are reading the port as an input */
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else
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{
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uint8_t out = port->m_out;
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if ((offset & 2) && m_irqenable)
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out = ((m_irqstate & TIMER_FLAG) ? 0x00 : 0x80) | (out & 0x7F);
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/* call the input callback if it exists */
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if (!BIT(offset, 1))
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port->m_in = m_in_pa_cb(0);
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else
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port->m_in = m_in_pb_cb(0);
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/* apply the DDR to the result */
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val = (out & port->m_ddr) | (port->m_in & ~port->m_ddr);
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}
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}
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return val;
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}
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/*-------------------------------------------------
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mos6530_porta_in_set - set port A input
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value
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-------------------------------------------------*/
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void mos6530l_device::porta_in_set(uint8_t data, uint8_t mask)
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{
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m_port[0].m_in = (m_port[0].m_in & ~mask) | (data & mask);
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}
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/*-------------------------------------------------
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mos6530_portb_in_set - set port B input
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value
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-------------------------------------------------*/
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void mos6530l_device::portb_in_set(uint8_t data, uint8_t mask)
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{
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m_port[1].m_in = (m_port[1].m_in & ~mask) | (data & mask);
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}
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/*-------------------------------------------------
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mos6530_porta_in_get - return port A input
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value
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-------------------------------------------------*/
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uint8_t mos6530l_device::porta_in_get()
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{
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return m_port[0].m_in;
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}
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/*-------------------------------------------------
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mos6530_portb_in_get - return port B input
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value
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-------------------------------------------------*/
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uint8_t mos6530l_device::portb_in_get()
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{
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return m_port[1].m_in;
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}
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/*-------------------------------------------------
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mos6530_porta_in_get - return port A output
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value
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-------------------------------------------------*/
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uint8_t mos6530l_device::porta_out_get()
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{
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return m_port[0].m_out;
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}
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/*-------------------------------------------------
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mos6530_portb_in_get - return port B output
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value
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-------------------------------------------------*/
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uint8_t mos6530l_device::portb_out_get()
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{
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return m_port[1].m_out;
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}
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@ -1,107 +0,0 @@
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// license:BSD-3-Clause
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// copyright-holders:Curt Coder
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/**********************************************************************
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MOS Technology 6530 Memory, I/O, Timer Array emulation
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**********************************************************************
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_____ _____
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Vss 1 |* \_/ | 40 PA1
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PA0 2 | | 39 PA2
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phi2 3 | | 38 PA3
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RS0 4 | | 37 PA4
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A9 5 | | 36 PA5
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A8 6 | | 35 PA6
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A7 7 | | 34 PA7
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A6 8 | | 33 DB0
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R/W 9 | | 32 DB1
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A5 10 | MCS6530 | 31 DB2
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A4 11 | | 30 DB3
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A3 12 | | 29 DB4
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A2 13 | | 28 DB5
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A1 14 | | 27 DB6
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A0 15 | | 26 DB7
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_RES 16 | | 25 PB0
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IRQ/PB7 17 | | 24 PB1
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CS1/PB6 18 | | 23 PB2
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CS2/PB5 19 | | 22 PB3
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Vcc 20 |_____________| 21 PB4
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**********************************************************************/
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#ifndef MAME_MACHINE_MOS6530L_H
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#define MAME_MACHINE_MOS6530L_H
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#pragma once
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/***************************************************************************
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TYPE DEFINITIONS
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***************************************************************************/
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/***************************************************************************
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MACROS / CONSTANTS
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***************************************************************************/
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class mos6530l_device : public device_t
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{
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public:
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mos6530l_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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auto in_pa_callback() { return m_in_pa_cb.bind(); }
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auto out_pa_callback() { return m_out_pa_cb.bind(); }
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auto in_pb_callback() { return m_in_pb_cb.bind(); }
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auto out_pb_callback() { return m_out_pb_cb.bind(); }
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uint8_t read(offs_t offset);
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void write(offs_t offset, uint8_t data);
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uint8_t porta_in_get();
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uint8_t portb_in_get();
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uint8_t porta_out_get();
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uint8_t portb_out_get();
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protected:
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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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TIMER_CALLBACK_MEMBER(end_state);
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private:
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struct mos6530_port
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{
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uint8_t m_in;
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uint8_t m_out;
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uint8_t m_ddr;
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};
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// internal state
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devcb_read8 m_in_pa_cb;
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devcb_write8 m_out_pa_cb;
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devcb_read8 m_in_pb_cb;
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devcb_write8 m_out_pb_cb;
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mos6530_port m_port[2];
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uint8_t m_irqstate;
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uint8_t m_irqenable;
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uint8_t m_timershift;
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uint8_t m_timerstate;
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emu_timer * m_timer;
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uint32_t m_clock;
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void update_irqstate();
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uint8_t get_timer();
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void porta_in_set(uint8_t data, uint8_t mask);
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void portb_in_set(uint8_t data, uint8_t mask);
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};
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DECLARE_DEVICE_TYPE(MOS6530L, mos6530l_device)
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#endif // MAME_MACHINE_MOS6530L_H
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