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osborne1: show contents of main video memory in F4 tilemap viewer

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intended for testing/debugging/curiosity purposes only
doesn't honour underline and dim bits or scroll registers
This commit is contained in:
Vas Crabb 2015-11-01 00:31:13 +11:00
parent 8e75b5374b
commit 03050aab9e
2 changed files with 22 additions and 1 deletions
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7
src/mame/includes/osborne1.h
View File

@ -30,6 +30,7 @@ public:
osborne1_state(const machine_config &mconfig, device_type type, const char *tag) :
driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_gfxdecode(*this, "gfxdecode"),
m_speaker(*this, "speaker"),
m_pia0(*this, "pia_0"),
m_pia1(*this, "pia_1"),
@ -54,6 +55,8 @@ public:
m_bank_1xxx(*this, "bank_1xxx"),
m_bank_fxxx(*this, "bank_fxxx"),
m_video_timer(NULL),
m_p_chargen(NULL),
m_tilemap(NULL),
m_acia_rxc_txc_timer(NULL)
{ }
@ -84,6 +87,7 @@ public:
UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
required_device<cpu_device> m_maincpu;
required_device<gfxdecode_device> m_gfxdecode;
required_device<speaker_sound_device> m_speaker;
required_device<pia6821_device> m_pia0;
required_device<pia6821_device> m_pia1;
@ -98,6 +102,8 @@ protected:
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
TIMER_CALLBACK_MEMBER(video_callback);
TILE_GET_INFO_MEMBER(get_tile_info);
bool set_rom_mode(UINT8 value);
bool set_bit_9(UINT8 value);
void update_irq();
@ -142,6 +148,7 @@ protected:
emu_timer *m_video_timer;
bitmap_ind16 m_bitmap;
UINT8 *m_p_chargen;
tilemap_t *m_tilemap;
// SCREEN-PAC registers
UINT8 m_resolution;

16
src/mame/machine/osborne1.c
View File

@ -96,7 +96,10 @@ WRITE8_MEMBER( osborne1_state::bank_2xxx_3xxx_w )
WRITE8_MEMBER( osborne1_state::videoram_w )
{
// Attribute RAM is only one bit wide - low seven bits are discarded and read back high
if (m_bit_9) data |= 0x7F;
if (m_bit_9)
data |= 0x7F;
else
m_tilemap->mark_tile_dirty(offset);
reinterpret_cast<UINT8 *>(m_bank_fxxx->base())[offset] = data;
}
@ -255,6 +258,10 @@ DRIVER_INIT_MEMBER( osborne1_state, osborne1 )
m_p_chargen = memregion("chargen")->base();
m_video_timer = timer_alloc(TIMER_VIDEO);
m_tilemap = &machine().tilemap().create(
m_gfxdecode,
tilemap_get_info_delegate(FUNC(osborne1_state::get_tile_info), this), TILEMAP_SCAN_ROWS,
8, 10, 128, 32);
m_acia_rxc_txc_timer = timer_alloc(TIMER_ACIA_RXC_TXC);
@ -437,6 +444,13 @@ TIMER_CALLBACK_MEMBER(osborne1_state::video_callback)
}
TILE_GET_INFO_MEMBER(osborne1_state::get_tile_info)
{
// The gfxdecode and tilemap aren't actually used for drawing, they just look nice in the F4 GFX viewer
tileinfo.set(0, m_ram->pointer()[0xF000 | tile_index] & 0x7F, 0, 0);
}
bool osborne1_state::set_rom_mode(UINT8 value)
{
if (value != m_rom_mode)