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// license:BSD-3-Clause
// copyright-holders:Vas Crabb
#ifndef MAME_BUS_NUBUS_SUPERMAC_H
#define MAME_BUS_NUBUS_SUPERMAC_H
#pragma once
class supermac_spec_crtc
{
public:
void register_save(device_t &device);
void reset() noexcept;
void write(device_t &device, offs_t offset, u32 data);
bool valid(device_t &device) const;
u32 h_sync(u32 scale) const noexcept
{ return (m_hsync + 1) * scale; }
u32 h_total(u32 scale) const noexcept
{ return (m_htotal + 1) * scale; }
u32 h_active(u32 scale) const noexcept
{ return (m_hend - m_hstart) * scale; }
u32 h_start(u32 scale) const noexcept
{ return (m_hstart + 1) * scale; }
u32 h_end(u32 scale) const noexcept
{ return (m_hend + 1) * scale; }
u16 v_sync() const noexcept
{ return m_vsync + 1; }
u16 v_total() const noexcept
{ return m_vtotal + 1; }
u32 v_active() const noexcept
{ return (m_vend - m_vstart); }
u16 v_start() const noexcept
{ return m_vstart + 1; }
u16 v_end() const noexcept
{ return m_vend + 1; }
attoseconds_t frame_time(u32 scale, XTAL const &osc) const noexcept
{ return attotime::from_ticks((m_htotal + 1) * (m_vtotal + 1) * scale, osc).attoseconds(); }
private:
u16 m_hsync, m_hstart, m_hend, m_htotal;
u16 m_vsync, m_vstart, m_vend, m_vtotal;
};
class supermac_spec_shift_reg
{
public:
void register_save(device_t &device);
void reset() noexcept;
void write_control(device_t &device, u32 data);
void write_data(device_t &device, u32 data);
bool ready() const noexcept { return m_shift_count == 10; }
u8 select() const noexcept { return (m_shift_data >> 6) & 0x03; }
u8 value() const noexcept { return (m_shift_data >> 8) & 0xff; }
private:
u16 m_shift_data;
u8 m_shift_count;
};
#endif // MAME_BUS_NUBUS_SUPERMAC_H
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