Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-24 01:11:11 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

scn2672: Reduce VRAM addressing (nw)

Browse Source
This commit is contained in:
AJR 2018-11-16 11:19:07 -05:00
parent 414846bf51
commit 3185a1b279
2 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/devices/video/scn2674.cpp
View File

@ -14,7 +14,7 @@
#define LOG_COMMAND (1 << 1)
#define LOG_INTR (1 << 2)
#define LOG_READ (1 << 3)
#define VERBOSE (1)
#define VERBOSE (0)
#include "logmacro.h"
@ -25,20 +25,20 @@ DEFINE_DEVICE_TYPE(SCN2674, scn2674_device, "scn2674", "Signetics SCN2674 AVDC")
// default address map
void scn2674_device::scn2674_vram(address_map &map)
{
map(0x0000, 0xffff).noprw();
map(0x0000, (1 << space_config(0)->addr_width()) - 1).noprw();
}
scn2672_device::scn2672_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: scn2674_device(mconfig, SCN2672, tag, owner, clock)
: scn2674_device(mconfig, SCN2672, tag, owner, clock, false)
{
}
scn2674_device::scn2674_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: scn2674_device(mconfig, SCN2674, tag, owner, clock)
: scn2674_device(mconfig, SCN2674, tag, owner, clock, true)
{
}
scn2674_device::scn2674_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
scn2674_device::scn2674_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock, bool extend_addressing)
: device_t(mconfig, type, tag, owner, clock)
, device_video_interface(mconfig, *this)
, device_memory_interface(mconfig, *this)
@ -84,8 +84,8 @@ scn2674_device::scn2674_device(const machine_config &mconfig, device_type type,
, m_linecounter(0), m_address(0), m_start1change(0)
, m_scanline_timer(nullptr)
, m_char_space(nullptr), m_attr_space(nullptr)
, m_char_space_config("charram", ENDIANNESS_LITTLE, 8, 16, 0, address_map_constructor(), address_map_constructor(FUNC(scn2674_device::scn2674_vram), this))
, m_attr_space_config("attrram", ENDIANNESS_LITTLE, 8, 16, 0, address_map_constructor(), address_map_constructor(FUNC(scn2674_device::scn2674_vram), this))
, m_char_space_config("charram", ENDIANNESS_LITTLE, 8, extend_addressing ? 16 : 14, 0, address_map_constructor(), address_map_constructor(FUNC(scn2674_device::scn2674_vram), this))
, m_attr_space_config("attrram", ENDIANNESS_LITTLE, 8, extend_addressing ? 16 : 14, 0, address_map_constructor(), address_map_constructor(FUNC(scn2674_device::scn2674_vram), this))
{
}

2
src/devices/video/scn2674.h
View File

@ -50,7 +50,7 @@ public:
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
protected:
scn2674_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
scn2674_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock, bool extend_addressing);
virtual void device_start() override;
virtual void device_reset() override;