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qvt201: Add gfxdecode

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This commit is contained in:
Dirk Best 2019-06-18 13:07:20 +02:00
parent 2a3feab576
commit c840f2cada
1 changed files with 39 additions and 0 deletions
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39
src/mame/drivers/qvt201.cpp
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@ -13,6 +13,7 @@ Skeleton driver for Qume QVT-201 & QVT-202 display terminals.
#include "machine/mc68681.h"
#include "machine/nvram.h"
#include "video/scn2674.h"
#include "emupal.h"
#include "screen.h"
class qvt201_state : public driver_device
@ -99,6 +100,40 @@ void qvt201_state::mem_map(address_map &map)
static INPUT_PORTS_START( qvt201 )
INPUT_PORTS_END
static const gfx_layout char_layout =
{
8,10,
RGN_FRAC(1,1), // 256
1,
{ 0 },
{ STEP8(0,1) },
{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8 },
8*16
};
// ascii control code chars
// those are also at 0x80 to 0x9f in the normal char decode
// don't know why they are duplicated here
static const gfx_layout ctrl_char_layout =
{
8,10,
RGN_FRAC(1,4), // 32
1,
{ 0 },
{ STEP8(0,1) },
{ 10*8, 11*8, 12*8, 13*8, 14*8, 16*8+10*8, 16*8+11*8, 16*8+12*8, 16*8+13*8, 16*8+14*8 },
8*32
};
// 64 bytes of data remain undecoded
// byte 10 and 11 from 0x400 to 0x7ff in the rom
// (0x000 to 0x3ff are the control chars above, 0x800 to 0xfff is 0xff)
static GFXDECODE_START(chars)
GFXDECODE_ENTRY("chargen", 0, char_layout, 0, 1)
GFXDECODE_ENTRY("chargen", 0, ctrl_char_layout, 0, 1)
GFXDECODE_END
void qvt201_state::qvt201(machine_config &config)
{
Z80(config, m_maincpu, 3.6864_MHz_XTAL);
@ -130,6 +165,10 @@ void qvt201_state::qvt201(machine_config &config)
//screen.set_raw(48.654_MHz_XTAL / 2, 170 * 9, 0, 132 * 9, 265, 0, 250);
screen.set_screen_update("crtc", FUNC(scn2672_device::screen_update));
PALETTE(config, "palette", palette_device::MONOCHROME_HIGHLIGHT);
GFXDECODE(config, "gfxdecode", "palette", chars);
scn2672_device &crtc(SCN2672(config, "crtc", 48.654_MHz_XTAL / 30));
crtc.set_character_width(10); // 9 in 132-column mode
crtc.intr_callback().set("mainint", FUNC(input_merger_device::in_w<0>));