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Diffstat (limited to 'trunk/src/emu/video/upd3301.h')
-rw-r--r--trunk/src/emu/video/upd3301.h198
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diff --git a/trunk/src/emu/video/upd3301.h b/trunk/src/emu/video/upd3301.h
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+++ b/trunk/src/emu/video/upd3301.h
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+/**********************************************************************
+
+ NEC uPD3301 Programmable CRT Controller emulation
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************
+ _____ _____
+ VRTC 1 |* \_/ | 40 Vcc
+ RVV 2 | | 39 SL0
+ CSR 3 | | 38 LC0
+ LPEN 4 | | 37 LC1
+ INT 5 | | 36 LC2
+ DRQ 6 | | 35 LC3
+ _DACK 7 | | 34 VSP
+ A0 8 | | 33 SL12
+ _RD 9 | | 32 GPA
+ _WR 10 | uPD3301 | 31 HLGT
+ _CS 11 | | 30 CC7
+ DB0 12 | | 29 CC6
+ DB1 13 | | 28 CC5
+ DB2 14 | | 27 CC4
+ DB3 15 | | 26 CC3
+ DB4 16 | | 25 CC2
+ DB5 17 | | 24 CC1
+ DB6 18 | | 23 CC0
+ DB7 19 | | 22 CCLK
+ GND 20 |_____________| 21 HRTC
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __UPD3301__
+#define __UPD3301__
+
+#include "emu.h"
+
+
+
+//**************************************************************************
+// MACROS / CONSTANTS
+//**************************************************************************
+
+
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_UPD3301_ADD(_tag, _clock, _intrf) \
+ MCFG_DEVICE_ADD(_tag, UPD3301, _clock) \
+ MCFG_DEVICE_CONFIG(_intrf)
+
+
+#define UPD3301_INTERFACE(name) \
+ const upd3301_interface (name) =
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> upd3301_display_pixels_func
+
+typedef void (*upd3301_display_pixels_func)(device_t *device, bitmap_ind16 &bitmap, int y, int sx, UINT8 cc, UINT8 lc, int hlgt, int rvv, int vsp, int sl0, int sl12, int csr, int gpa);
+#define UPD3301_DISPLAY_PIXELS(name) void name(device_t *device, bitmap_ind16 &bitmap, int y, int sx, UINT8 cc, UINT8 lc, int hlgt, int rvv, int vsp, int sl0, int sl12, int csr, int gpa)
+
+
+// ======================> upd3301_interface
+
+struct upd3301_interface
+{
+ const char *m_screen_tag; // screen we are acting on
+ int m_width; // char width in pixels
+
+ upd3301_display_pixels_func m_display_cb;
+
+ devcb_write_line m_out_int_cb;
+ devcb_write_line m_out_drq_cb;
+ devcb_write_line m_out_hrtc_cb;
+ devcb_write_line m_out_vrtc_cb;
+};
+
+
+
+// ======================> upd3301_device
+
+class upd3301_device : public device_t,
+ public upd3301_interface
+{
+public:
+ // construction/destruction
+ upd3301_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ DECLARE_READ8_MEMBER( read );
+ DECLARE_WRITE8_MEMBER( write );
+ DECLARE_WRITE8_MEMBER( dack_w );
+ DECLARE_WRITE_LINE_MEMBER( lpen_w );
+ DECLARE_READ_LINE_MEMBER( hrtc_r );
+ DECLARE_READ_LINE_MEMBER( vrtc_r );
+
+ UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+
+protected:
+ // device-level overrides
+ virtual void device_config_complete();
+ virtual void device_start();
+ virtual void device_reset();
+ virtual void device_clock_changed();
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+
+private:
+ static const device_timer_id TIMER_HRTC = 0;
+ static const device_timer_id TIMER_VRTC = 1;
+ static const device_timer_id TIMER_DRQ = 2;
+
+ inline void set_interrupt(int state);
+ inline void set_drq(int state);
+ inline void set_display(int state);
+ inline void reset_counters();
+ inline void update_hrtc_timer(int state);
+ inline void update_vrtc_timer(int state);
+ inline void recompute_parameters();
+
+ void draw_scanline();
+
+ devcb_resolved_write_line m_out_int_func;
+ devcb_resolved_write_line m_out_drq_func;
+ devcb_resolved_write_line m_out_hrtc_func;
+ devcb_resolved_write_line m_out_vrtc_func;
+
+ screen_device *m_screen;
+
+ // screen drawing
+ bitmap_ind16 *m_bitmap; // bitmap
+ int m_y; // current scanline
+ int m_hrtc; // horizontal retrace
+ int m_vrtc; // vertical retrace
+
+ // live state
+ int m_mode; // command mode
+ UINT8 m_status; // status register
+ int m_param_count; // parameter count
+
+ // FIFOs
+ UINT8 m_data_fifo[80][2]; // row data FIFO
+ UINT8 m_attr_fifo[40][2]; // attribute FIFO
+ int m_data_fifo_pos; // row data FIFO position
+ int m_attr_fifo_pos; // attribute FIFO position
+ int m_input_fifo; // which FIFO is in input mode
+
+ // interrupts
+ int m_mn; // disable special character interrupt
+ int m_me; // disable end of screen interrupt
+ int m_dma_mode; // DMA mode
+
+ // screen geometry
+ int m_h; // characters per line
+ int m_b; // cursor blink time
+ int m_l; // lines per screen
+ int m_s; // display every other line
+ int m_c; // cursor mode
+ int m_r; // lines per character
+ int m_v; // vertical blanking height
+ int m_z; // horizontal blanking width
+
+ // attributes
+ int m_at1; //
+ int m_at0; //
+ int m_sc; //
+ int m_attr; // attributes per row
+ int m_attr_blink; // attribute blink
+ int m_attr_frame; // attribute blink frame counter
+
+ // cursor
+ int m_cm; // cursor visible
+ int m_cx; // cursor column
+ int m_cy; // cursor row
+ int m_cursor_blink; // cursor blink
+ int m_cursor_frame; // cursor blink frame counter
+
+ // timers
+ emu_timer *m_hrtc_timer;
+ emu_timer *m_vrtc_timer;
+ emu_timer *m_drq_timer;
+};
+
+
+// device type definition
+extern const device_type UPD3301;
+
+
+
+#endif