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https://github.com/holub/mame
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(nw) screen for hazeltine
This commit is contained in:
Robbbert
parent
6a09da3141
commit
239d44f6c2
@ -13,6 +13,8 @@ Hazeltine Esprit terminals.
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#include "emu.h"
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#include "cpu/m6502/m6502.h"
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#include "video/mc6845.h"
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#include "screen.h"
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class hazeltine_state : public driver_device
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{
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@ -21,34 +23,116 @@ public:
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: driver_device(mconfig, type, tag)
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, m_maincpu(*this, "maincpu")
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, m_p_chargen(*this, "chargen")
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, m_p_videoram(*this, "videoram")
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, m_palette(*this, "palette")
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{ }
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MC6845_UPDATE_ROW(crtc_update_row);
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DECLARE_DRIVER_INIT(init);
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private:
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required_device<cpu_device> m_maincpu;
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required_region_ptr<u8> m_p_chargen;
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required_shared_ptr<u8> m_p_videoram;
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optional_device<palette_device> m_palette;
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};
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static ADDRESS_MAP_START( mem_map, AS_PROGRAM, 8, hazeltine_state )
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ADDRESS_MAP_GLOBAL_MASK (0x7fff)
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AM_RANGE(0x0000,0x6fff) AM_RAM
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AM_RANGE(0x0058,0x0058) AM_DEVREADWRITE("crtc", mc6845_device, status_r, address_w)
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AM_RANGE(0x0059,0x0059) AM_DEVREADWRITE("crtc", mc6845_device, register_r, register_w)
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AM_RANGE(0x0080,0x1fff) AM_RAM
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AM_RANGE(0x2000,0x6fff) AM_RAM AM_SHARE("videoram")
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AM_RANGE(0x7000,0x7fff) AM_ROM AM_REGION("roms", 0)
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ADDRESS_MAP_END
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static ADDRESS_MAP_START( mem3_map, AS_PROGRAM, 8, hazeltine_state )
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AM_RANGE(0x0000,0xdfff) AM_RAM
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AM_RANGE(0x0000,0x202f) AM_RAM
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AM_RANGE(0x2030,0x3fff) AM_RAM AM_SHARE("videoram") // it might start at 3000
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AM_RANGE(0x81c0,0x81c0) AM_DEVREADWRITE("crtc", mc6845_device, status_r, address_w)
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AM_RANGE(0x81c1,0x81c1) AM_DEVREADWRITE("crtc", mc6845_device, register_r, register_w)
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AM_RANGE(0xe000,0xffff) AM_ROM AM_REGION("roms", 0)
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ADDRESS_MAP_END
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static INPUT_PORTS_START( hazeltine )
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INPUT_PORTS_END
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MC6845_UPDATE_ROW( hazeltine_state::crtc_update_row )
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{
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const rgb_t *pens = m_palette->palette()->entry_list_raw();
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uint8_t chr,gfx;
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uint16_t mem,x;
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uint32_t *p = &bitmap.pix32(y);
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for (x = 0; x < x_count; x++)
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{
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mem = (ma + x) & 0x7ff;
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chr = m_p_videoram[mem];
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/* get pattern of pixels for that character scanline */
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gfx = m_p_chargen[(chr<<4) | ra] ^ ((x == cursor_x) ? 0xff : 0);
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/* Display a scanline of a character (8 pixels) */
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*p++ = pens[BIT(gfx, 7)];
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*p++ = pens[BIT(gfx, 6)];
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*p++ = pens[BIT(gfx, 5)];
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*p++ = pens[BIT(gfx, 4)];
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*p++ = pens[BIT(gfx, 3)];
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*p++ = pens[BIT(gfx, 2)];
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*p++ = pens[BIT(gfx, 1)];
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*p++ = pens[BIT(gfx, 0)];
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}
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}
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/* F4 Character Displayer */
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static const gfx_layout hazeltine_charlayout =
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{
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8, 12, /* 8 x 12 characters */
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256, /* 256 characters */
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1, /* 1 bits per pixel */
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{ 0 }, /* no bitplanes */
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/* x offsets */
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{ 0, 1, 2, 3, 4, 5, 6, 7 },
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/* y offsets */
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{ 0, 8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8 },
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8*16 /* every char takes 16 bytes */
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};
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static GFXDECODE_START( hazeltine )
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GFXDECODE_ENTRY( "chargen", 0x0000, hazeltine_charlayout, 0, 1 )
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GFXDECODE_END
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DRIVER_INIT_MEMBER( hazeltine_state, init )
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{
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// chargen is incomplete, copy the first half into the vacant second half
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for (u16 i = 0; i < 0x800; i++)
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m_p_chargen[0x800 | i] = m_p_chargen[i];
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}
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static MACHINE_CONFIG_START( hazeltine )
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MCFG_CPU_ADD("maincpu", M6502, 1000000) // no idea of clock
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MCFG_CPU_PROGRAM_MAP(mem_map)
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/* video hardware */
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MCFG_SCREEN_ADD_MONOCHROME("screen", RASTER, rgb_t::green())
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MCFG_SCREEN_REFRESH_RATE(60)
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MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) // not correct
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MCFG_SCREEN_UPDATE_DEVICE("crtc", mc6845_device, screen_update)
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MCFG_SCREEN_SIZE(32*8, 32*8)
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MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 2*8, 30*8-1)
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MCFG_GFXDECODE_ADD("gfxdecode", "palette", hazeltine)
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MCFG_PALETTE_ADD_MONOCHROME("palette")
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/* Devices */
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MCFG_MC6845_ADD("crtc", MC6845, "screen", 1000000) // clk unknown
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MCFG_MC6845_SHOW_BORDER_AREA(false)
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MCFG_MC6845_CHAR_WIDTH(8)
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MCFG_MC6845_UPDATE_ROW_CB(hazeltine_state, crtc_update_row)
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MACHINE_CONFIG_END
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static MACHINE_CONFIG_START( hazeltine3 )
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MCFG_CPU_ADD("maincpu", M6502, 1000000) // no idea of clock
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static MACHINE_CONFIG_DERIVED( hazeltine3, hazeltine )
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MCFG_CPU_MODIFY("maincpu")
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MCFG_CPU_PROGRAM_MAP(mem3_map)
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MACHINE_CONFIG_END
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@ -56,7 +140,7 @@ ROM_START( hazeltine )
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// Esprit
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ROM_REGION( 0x1000, "roms", 0 )
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ROM_LOAD( "hazeltine_esprit.u19", 0x0000, 0x1000, CRC(6fdec792) SHA1(a1d1d68c8793e7e15ab5cd17682c299dff3985cb) )
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ROM_REGION( 0x1000, "chargen", 0 )
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ROM_REGION( 0x1000, "chargen", ROMREGION_INVERT )
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ROM_LOAD( "hazeltine_esprit.u26", 0x0000, 0x0804, CRC(93f45f13) SHA1(1f493b44124c348759469e24fdfa8b7c52fe6fac) )
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ROM_END
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@ -68,5 +152,5 @@ ROM_START( hazeltine3 )
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ROM_LOAD( "hazeltine_espritiii.u19", 0x0000, 0x1000, CRC(33e4a8ef) SHA1(e19c84a3c5f94812928ea84bab3ede7970dd5e72) )
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ROM_END
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COMP( 1981, hazeltine, 0, 0, hazeltine, hazeltine, hazeltine_state, 0, "Hazeltine", "Esprit", MACHINE_IS_SKELETON )
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COMP( 1981, hazeltine, 0, 0, hazeltine, hazeltine, hazeltine_state, init, "Hazeltine", "Esprit", MACHINE_IS_SKELETON )
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COMP( 1981, hazeltine3, hazeltine, 0, hazeltine3, hazeltine, hazeltine_state, 0, "Hazeltine", "Esprit III", MACHINE_IS_SKELETON )
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@ -47,7 +47,7 @@ public:
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private:
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virtual void machine_reset() override;
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required_device<palette_device> m_palette;
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required_shared_ptr<uint8_t> m_p_videoram;
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required_shared_ptr<u8> m_p_videoram;
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required_device<z80_device> m_maincpu;
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required_region_ptr<u8> m_p_chargen;
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};
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