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isa_ibm_pgc: reinstall ROM mapping at reset time

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This commit is contained in:
Sergey Svishchev 2015-09-12 10:06:02 +03:00
parent 74ceaefbe0
commit 4f6f606be5
2 changed files with 13 additions and 18 deletions
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29
src/devices/bus/isa/pgc.c
View File

@ -16,9 +16,9 @@
http://www.seasip.info/VintagePC/pgc.html
To do:
- memory map (restore ROM mapping on reset, ...)
- decode memory map
- various VRAM write modes
- what's up with irq 3 (= vblank irq)?
- what's up with irq 3 (= vblank irq)? (causes soft reset)
- "test pin of the microprocessor samples the hsync pulse"
- CGA emulator
- bus state handling?
@ -28,8 +28,6 @@
#include "emu.h"
//nclude "machine/ram.h"
#include "pgc.h"
#define VERBOSE_PGC 1
@ -223,10 +221,6 @@ isa8_pgc_device::isa8_pgc_device(const machine_config &mconfig, device_type type
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void isa8_pgc_device::device_start()
{
address_space &space = m_cpu->space( AS_PROGRAM );
@ -251,11 +245,17 @@ void isa8_pgc_device::device_start()
membank("vram")->set_base(m_vram);
m_eram = auto_alloc_array(machine(), UINT8, 0x8000);
machine().add_notifier(MACHINE_NOTIFY_RESET, machine_notify_delegate(FUNC(isa8_pgc_device::reset_common), this));
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void isa8_pgc_device::reset_common()
{
address_space &space = m_cpu->space( AS_PROGRAM );
space.unmap_readwrite(0xf8000, 0xfffff);
space.install_rom(0xf8000, 0xfffff, memregion("maincpu")->base() + 0x8000);
}
void isa8_pgc_device::device_reset()
{
@ -267,13 +267,6 @@ void isa8_pgc_device::device_reset()
m_isa->install_bank(0xc6400, 0xc67ff, 0, 0, "commarea", m_commarea);
else
m_isa->install_bank(0xc6000, 0xc63ff, 0, 0, "commarea", m_commarea);
#if 0
address_space &space = m_cpu->space( AS_PROGRAM );
space.unmap_readwrite(0xf8000, 0xfffff);
space.install_rom(0xf8000, 0xfffff,
space.machine().root_device().memregion("maincpu")->base() + 0x8000);
#endif
}
//

2
src/devices/bus/isa/pgc.h
View File

@ -42,6 +42,8 @@ public:
DECLARE_WRITE8_MEMBER( lut_w );
DECLARE_READ8_MEMBER( init_r );
void reset_common();
protected:
// device-level overrides
virtual void device_start();