mirror of
https://github.com/holub/mame
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25a100d773
house a screen tag and to find the screen at startup, providing an m_screen object that can be used. One nice feature is that if there is only one screen and no screen has been specified, it will auto configure to that screen. This removes the need to explicitly specify a screen in the configuration for a large chunk of drivers (though doing so never hurts). A new macro MCFG_VIDEO_SET_SCREEN is provided, though devices are encouraged to define their own that maps there so it is obvious which device is being targeted. The device_video_interface's validation function will error if an invalid screen is specified or if no screen is provided but there are multiple screens present. Updated all devices that currently had an m_screen in them to use the device_video_interface instead. This also has the nice benefit of flagging video-related devices for categorization purposes. It also means all these devices inherit the same screen-finding behaviors. For devices that had interfaces that specified a screen tag, those have been removed and all existing structs updated. Added an optional_device<screen_device> m_screen to the base driver_device. If you name your screen "screen" (as most drivers do), you will have free access to your screen this way. Future updates include: * Updating all devices referencing machine.primary_screen to use the device_video_interface instead * Updating all drivers referencing machine.primary_screen to use the m_screen instead * Removing machine.primary_screen entirely
371 lines
13 KiB
C
371 lines
13 KiB
C
/*********************************************************************
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a2videoterm.c
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Implementation of the Videx VideoTerm 80-column card
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Notes (from Videoterm user's manual, which contains
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schematics and firmware source listings).
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C0nX: C0n0 is 6845 register address,
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C0n1 is 6845 register data.
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Bits 2 & 3 on any access to C0nX set the VRAM page at CC00.
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C800-CBFF: ROM
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CC00-CDFF: VRAM window
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TODO:
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Cursor is probably not completely right.
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Add font ROM select.
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*********************************************************************/
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#include "a2videoterm.h"
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#include "includes/apple2.h"
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/***************************************************************************
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PARAMETERS
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***************************************************************************/
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//**************************************************************************
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// GLOBAL VARIABLES
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//**************************************************************************
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const device_type A2BUS_VIDEOTERM = &device_creator<a2bus_videoterm_device>;
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const device_type A2BUS_IBSAP16 = &device_creator<a2bus_ap16_device>;
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const device_type A2BUS_IBSAP16ALT = &device_creator<a2bus_ap16alt_device>;
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const device_type A2BUS_VTC1 = &device_creator<a2bus_vtc1_device>;
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const device_type A2BUS_VTC2 = &device_creator<a2bus_vtc2_device>;
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#define VIDEOTERM_ROM_REGION "vterm_rom"
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#define VIDEOTERM_GFX_REGION "vterm_gfx"
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#define VIDEOTERM_SCREEN_NAME "vterm_screen"
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#define VIDEOTERM_MC6845_NAME "mc6845_vterm"
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#define MDA_CLOCK 16257000
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static MC6845_UPDATE_ROW( videoterm_update_row );
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static MC6845_INTERFACE( mc6845_mda_intf )
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{
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false, /* show border area */
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8, /* number of pixels per video memory address */
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NULL, /* begin_update */
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videoterm_update_row, /* update_row */
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NULL, /* end_update */
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DEVCB_NULL, /* on_de_changed */
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DEVCB_NULL, /* on_cur_changed */
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DEVCB_NULL, /* on hsync changed */
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DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, a2bus_videx80_device, vsync_changed), /* on_vsync_changed */
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NULL
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};
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MACHINE_CONFIG_FRAGMENT( a2videoterm )
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MCFG_SCREEN_ADD( VIDEOTERM_SCREEN_NAME, RASTER) // 560x216? (80x24 7x9 characters)
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MCFG_SCREEN_RAW_PARAMS(MDA_CLOCK, 882, 0, 720, 370, 0, 350 )
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MCFG_SCREEN_UPDATE_DEVICE( VIDEOTERM_MC6845_NAME, mc6845_device, screen_update )
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MCFG_MC6845_ADD( VIDEOTERM_MC6845_NAME, MC6845, VIDEOTERM_SCREEN_NAME, MDA_CLOCK/9, mc6845_mda_intf)
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MACHINE_CONFIG_END
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ROM_START( a2videoterm )
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ROM_REGION(0x400, VIDEOTERM_ROM_REGION, 0)
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ROM_LOAD( "videx videoterm rom 2.4.bin", 0x000000, 0x000400, CRC(bbe3bb28) SHA1(bb653836e84850ce3197f461d4e19355f738cfbf) )
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ROM_REGION(0x5000, VIDEOTERM_GFX_REGION, 0)
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ROM_LOAD( "videx videoterm character rom normal.bin", 0x000000, 0x000800, CRC(87f89f08) SHA1(410b54f33d13c82e3857f1be906d93a8c5b8d321) )
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ROM_LOAD( "videx videoterm character rom normal uppercase.bin", 0x000800, 0x000800, CRC(3d94a7a4) SHA1(5518254f24bc945aab13bc71ecc9526d6dd8e033) )
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ROM_LOAD( "videx videoterm character rom apl.bin", 0x001000, 0x000800, CRC(1adb704e) SHA1(a95df910eca33188cacee333b1325aa47edbcc25) )
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ROM_LOAD( "videx videoterm character rom epson.bin", 0x001800, 0x000800, CRC(0c6ef8d0) SHA1(db72c0c120086f1aa4a87120c5d7993c4a9d3a18) )
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ROM_LOAD( "videx videoterm character rom french.bin", 0x002000, 0x000800, CRC(266aa837) SHA1(2c6b4e9d342dbb2de8e278740f11925a9d8c6616) )
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ROM_LOAD( "videx videoterm character rom german.bin", 0x002800, 0x000800, CRC(df7324fa) SHA1(0ce58d2ffadbebc8db9f85bbb9a08a4f142af682) )
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ROM_LOAD( "videx videoterm character rom katakana.bin", 0x003000, 0x000800, CRC(b728690e) SHA1(e018fa66b0ff560313bb35757c9ce7adecae0c3a) )
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ROM_LOAD( "videx videoterm character rom spanish.bin", 0x003800, 0x000800, CRC(439eac08) SHA1(d6f9f8eb7702440d9ae39129ea4f480b80fc4608) )
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ROM_LOAD( "videx videoterm character rom super and subscript.bin", 0x004000, 0x000800, CRC(08b7c538) SHA1(7f4029d97be05680fe695debe07cea07666419e0) )
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ROM_LOAD( "videx videoterm character rom symbol.bin", 0x004800, 0x000800, CRC(82bce582) SHA1(29dfa8c5257dbf25651c6bffa9cdb453482aa70e) )
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ROM_END
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ROM_START( a2ap16 )
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ROM_REGION(0x2000, VIDEOTERM_ROM_REGION, 0)
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ROM_LOAD( "space 84 video ap16.bin", 0x000000, 0x002000, CRC(0e188da2) SHA1(9a29250b6cc7b576fdc67769944de35e6f54b9d5) )
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ROM_REGION(0x4000, VIDEOTERM_GFX_REGION, 0)
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ROM_LOAD( "space 84 video chargen ap16.bin", 0x000000, 0x002000, CRC(b9447088) SHA1(19c95f91a67b948fc00a14621d574d629479d451) )
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ROM_END
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ROM_START( a2ap16alt )
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ROM_REGION(0x1000, VIDEOTERM_ROM_REGION, 0)
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ROM_LOAD( "unknown apple ii clone video 3.bin", 0x000000, 0x001000, CRC(af1226d2) SHA1(18a569f417a47f54a17bd9046d306a54b46ed049) )
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ROM_REGION(0x4000, VIDEOTERM_GFX_REGION, 0)
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ROM_LOAD( "unknown apple ii clone video 1.bin", 0x000000, 0x001000, CRC(cf84811c) SHA1(135f4f35607dd74941f0a3cae813227bf8a8a020) )
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ROM_END
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ROM_START( vtc1 )
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ROM_REGION(0x800, VIDEOTERM_ROM_REGION, 0)
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ROM_LOAD( "10.ic10.bin", 0x000000, 0x000800, CRC(ddbbc2fb) SHA1(15d6142b177b47c016f2745e1d95767b440d77c7) )
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ROM_REGION(0x1000, VIDEOTERM_GFX_REGION, 0)
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ROM_LOAD( "9.ic9.bin", 0x000000, 0x000800, CRC(094670f1) SHA1(aefae76fb07740d042cf294f01424efa7cc7a199) )
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ROM_LOAD( "8.ic8.bin", 0x000800, 0x000800, CRC(fbd98d77) SHA1(0d9b1c3917e23ca35d5fbd405f05ff6e87122b92) )
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ROM_END
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ROM_START( vtc2 )
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ROM_REGION(0x800, VIDEOTERM_ROM_REGION, 0)
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ROM_LOAD( "6.ic6.bin", 0x000000, 0x000800, CRC(5776fa24) SHA1(19f69011ed7d2551c39d5c1cac1f5a2defc8f8fb) )
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ROM_REGION(0x1000, VIDEOTERM_GFX_REGION, 0)
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ROM_LOAD( "5.ic5.bin", 0x000000, 0x000800, CRC(aafa7085) SHA1(54d7c358f1927ba8f3b61145215a806d8cb6b673) )
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ROM_LOAD( "4.ic4.bin", 0x000800, 0x000800, CRC(8a497a48) SHA1(50c3df528109c65491a001ec74e50351a652c1fd) )
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ROM_END
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/***************************************************************************
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FUNCTION PROTOTYPES
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***************************************************************************/
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//-------------------------------------------------
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// machine_config_additions - device-specific
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// machine configurations
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//-------------------------------------------------
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machine_config_constructor a2bus_videx80_device::device_mconfig_additions() const
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{
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return MACHINE_CONFIG_NAME( a2videoterm );
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}
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//-------------------------------------------------
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// rom_region - device-specific ROM region
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//-------------------------------------------------
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const rom_entry *a2bus_videoterm_device::device_rom_region() const
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{
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return ROM_NAME( a2videoterm );
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}
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const rom_entry *a2bus_ap16_device::device_rom_region() const
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{
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return ROM_NAME( a2ap16 );
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}
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const rom_entry *a2bus_ap16alt_device::device_rom_region() const
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{
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return ROM_NAME( a2ap16alt );
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}
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const rom_entry *a2bus_vtc1_device::device_rom_region() const
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{
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return ROM_NAME( vtc1 );
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}
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const rom_entry *a2bus_vtc2_device::device_rom_region() const
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{
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return ROM_NAME( vtc2 );
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}
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//**************************************************************************
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// LIVE DEVICE
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//**************************************************************************
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a2bus_videx80_device::a2bus_videx80_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) :
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device_t(mconfig, type, name, tag, owner, clock, shortname, source),
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device_a2bus_card_interface(mconfig, *this),
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m_crtc(*this, VIDEOTERM_MC6845_NAME)
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{
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}
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a2bus_videoterm_device::a2bus_videoterm_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
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a2bus_videx80_device(mconfig, A2BUS_VIDEOTERM, "Videx VideoTerm", tag, owner, clock, "a2vidtrm", __FILE__)
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{
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}
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a2bus_ap16_device::a2bus_ap16_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
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a2bus_videx80_device(mconfig, A2BUS_IBSAP16, "IBS AP-16 80 column card", tag, owner, clock, "a2ap16", __FILE__)
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{
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}
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a2bus_ap16alt_device::a2bus_ap16alt_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
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a2bus_videx80_device(mconfig, A2BUS_IBSAP16ALT, "IBS AP-16 80 column card (alt. version)", tag, owner, clock, "a2ap16a", __FILE__)
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{
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}
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a2bus_vtc1_device::a2bus_vtc1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
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a2bus_videx80_device(mconfig, A2BUS_VTC1, "Unknown VideoTerm clone #1", tag, owner, clock, "a2vtc1", __FILE__)
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{
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}
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a2bus_vtc2_device::a2bus_vtc2_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
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a2bus_videx80_device(mconfig, A2BUS_VTC2, "Unknown VideoTerm clone #2", tag, owner, clock, "a2vtc2", __FILE__)
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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 a2bus_videx80_device::device_start()
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{
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// set_a2bus_device makes m_slot valid
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set_a2bus_device();
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astring tempstring;
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m_rom = device().machine().root_device().memregion(this->subtag(tempstring, VIDEOTERM_ROM_REGION))->base();
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astring tempstring2;
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m_chrrom = device().machine().root_device().memregion(this->subtag(tempstring2, VIDEOTERM_GFX_REGION))->base();
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memset(m_ram, 0, 4*512);
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save_item(NAME(m_ram));
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save_item(NAME(m_framecnt));
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save_item(NAME(m_rambank));
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}
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void a2bus_videx80_device::device_reset()
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{
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m_rambank = 0;
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m_framecnt = 0;
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}
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/*-------------------------------------------------
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read_c0nx - called for reads from this card's c0nx space
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-------------------------------------------------*/
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UINT8 a2bus_videx80_device::read_c0nx(address_space &space, UINT8 offset)
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{
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// printf("Read c0n%x (PC=%x)\n", offset, space.device().safe_pc());
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m_rambank = ((offset>>2) & 3) * 512;
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if (offset == 1)
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{
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return m_crtc->register_r(space, offset); // status_r?
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}
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return 0xff;
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}
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/*-------------------------------------------------
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write_c0nx - called for writes to this card's c0nx space
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-------------------------------------------------*/
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void a2bus_videx80_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data)
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{
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// printf("Write %02x to c0n%x (PC=%x)\n", data, offset, space.device().safe_pc());
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if (offset == 0)
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{
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m_crtc->address_w(space, offset, data);
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}
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else if (offset == 1)
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{
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m_crtc->register_w(space, offset, data);
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}
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m_rambank = ((offset>>2) & 3) * 512;
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}
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/*-------------------------------------------------
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read_cnxx - called for reads from this card's cnxx space
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-------------------------------------------------*/
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UINT8 a2bus_videx80_device::read_cnxx(address_space &space, UINT8 offset)
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{
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return m_rom[offset+0x300];
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}
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UINT8 a2bus_ap16_device::read_cnxx(address_space &space, UINT8 offset)
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{
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return m_rom[offset+0x1f00];
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}
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UINT8 a2bus_ap16alt_device::read_cnxx(address_space &space, UINT8 offset)
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{
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return m_rom[offset+0xb00];
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}
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/*-------------------------------------------------
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write_cnxx - called for writes to this card's cnxx space
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the firmware writes here to switch in our $C800 a lot
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-------------------------------------------------*/
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void a2bus_videx80_device::write_cnxx(address_space &space, UINT8 offset, UINT8 data)
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{
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}
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/*-------------------------------------------------
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read_c800 - called for reads from this card's c800 space
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-------------------------------------------------*/
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UINT8 a2bus_videx80_device::read_c800(address_space &space, UINT16 offset)
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{
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// ROM at c800-cbff
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// bankswitched RAM at cc00-cdff
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if (offset < 0x400)
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{
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// printf("Read VRAM at %x = %02x\n", offset+m_rambank, m_ram[offset + m_rambank]);
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return m_rom[offset];
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}
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else
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{
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return m_ram[(offset-0x400) + m_rambank];
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}
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}
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/*-------------------------------------------------
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write_c800 - called for writes to this card's c800 space
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-------------------------------------------------*/
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void a2bus_videx80_device::write_c800(address_space &space, UINT16 offset, UINT8 data)
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{
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if (offset >= 0x400)
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{
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// printf("%02x to VRAM at %x\n", data, offset-0x400+m_rambank);
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m_ram[(offset-0x400) + m_rambank] = data;
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}
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}
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static MC6845_UPDATE_ROW( videoterm_update_row )
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{
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a2bus_videx80_device *vterm = downcast<a2bus_videx80_device *>(device->owner());
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const rgb_t *palette = palette_entry_list_raw(bitmap.palette());
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UINT32 *p = &bitmap.pix32(y);
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UINT16 chr_base = ra; //( ra & 0x08 ) ? 0x800 | ( ra & 0x07 ) : ra;
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int i;
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for ( i = 0; i < x_count; i++ )
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{
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UINT16 offset = ( ma + i ) & 0x7ff;
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UINT8 chr = vterm->m_ram[ offset ];
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UINT8 data = vterm->m_chrrom[ chr_base + chr * 16 ];
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UINT8 fg = 15;
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UINT8 bg = 0;
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if ( i == cursor_x )
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{
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if ( vterm->m_framecnt & 0x08 )
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{
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data = 0xFF;
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}
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}
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*p = palette[( data & 0x80 ) ? fg : bg]; p++;
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*p = palette[( data & 0x40 ) ? fg : bg]; p++;
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*p = palette[( data & 0x20 ) ? fg : bg]; p++;
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*p = palette[( data & 0x10 ) ? fg : bg]; p++;
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*p = palette[( data & 0x08 ) ? fg : bg]; p++;
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*p = palette[( data & 0x04 ) ? fg : bg]; p++;
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*p = palette[( data & 0x02 ) ? fg : bg]; p++;
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*p = palette[( data & 0x01 ) ? fg : bg]; p++;
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}
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}
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WRITE_LINE_MEMBER( a2bus_videx80_device::vsync_changed )
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{
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if ( state )
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{
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m_framecnt++;
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}
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}
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