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palm: add program level output

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This commit is contained in:
Patrick Mackinlay 2024-04-04 17:30:45 +07:00
parent 141b19568a
commit c283d68064
2 changed files with 11 additions and 9 deletions
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18
src/devices/cpu/palm/palm.cpp
View File

@ -42,6 +42,7 @@ palm_device::palm_device(machine_config const &mconfig, char const *tag, device_
, m_iod_config("iod", ENDIANNESS_BIG, 8, 4)
, m_getb_bus(*this)
, m_select_ros(*this)
, m_program_level(*this)
, m_icount(0)
, m_r{}
{
@ -89,6 +90,7 @@ void palm_device::device_reset()
// select instruction source
m_ff = FF_IPL | FF_MSS;
m_select_ros((m_ff & FF_MSS) && !(m_ff & FF_IPL));
m_program_level(0);
// read initial PC from ROS
m_il = 0;
@ -110,6 +112,7 @@ void palm_device::execute_run()
if ((m_ff & FF_IE) && m_il != il)
{
m_il = il;
m_program_level(m_il > 0);
// notify the debugger
if (m_il && (machine().debug_flags & DEBUG_FLAG_ENABLED))
@ -209,8 +212,6 @@ void palm_device::execute_run()
}
else
{
m_getb_bus(DA, Ry);
if (MOD < 0xc)
{
// get byte
@ -218,8 +219,12 @@ void palm_device::execute_run()
Ry += modifier(MOD);
}
else
{
m_getb_bus(DA, Ry);
// get register byte
Ry = (Ry & 0xff00U) | m_ioc.read_byte(DA);
}
}
break;
case 0xf: Rx -= IMM + 1; break; // subtract immediate
@ -305,7 +310,7 @@ void palm_device::control(u8 data)
{
LOG("control 0x%02x (%s)\n", data, machine().describe_context());
// 0 reset controller errors
// 0: reset controller errors
// 1: 0=disable interrupts
// 2: 0=enable interrupts
@ -314,10 +319,7 @@ void palm_device::control(u8 data)
else if (!IBIT(data, 2))
m_ff |= FF_IE;
// TODO: 3 not used?
// 4 not used (0:display & select frame on)
// 5 state transition
// 5: state transition
if (!IBIT(data, 5))
{
m_ff &= ~FF_IPL;
@ -325,6 +327,4 @@ void palm_device::control(u8 data)
m_select_ros((m_ff & FF_MSS) && !(m_ff & FF_IPL));
}
// TODO: 6..7 not used (frame bit #1,2?)
}

2
src/devices/cpu/palm/palm.h
View File

@ -22,6 +22,7 @@ public:
auto getb_bus() { return m_getb_bus.bind(); }
auto select_ros() { return m_select_ros.bind(); }
auto program_level() { return m_program_level.bind(); }
palm_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock);
@ -62,6 +63,7 @@ private:
devcb_write8 m_getb_bus;
devcb_write_line m_select_ros;
devcb_write_line m_program_level;
// mame state
int m_icount;