Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-07-02 16:49:22 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

(mess) applix: The mirror is required for the system to size up the ram correctly [O. Galibert]

Browse Source
This commit is contained in:
Olivier Galibert 2013-05-02 16:27:24 +00:00
parent 99a292585f
commit a2c3abcc14
1 changed files with 11 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
src/mess/drivers/applix.c
View File

@ -18,10 +18,6 @@
- Keyboard is a standard pc keyboard
- Sound is stereo dac-sound, plus an analog output. Details unknown.
This system uses a number of unemulated opcodes (A0xx). Our M68000 core
mishandles this scenario, doing a random jump to nearby code. This
continues, filling up the stack, and eventually causes a total freeze.
****************************************************************************/
#include "emu.h"
@ -38,7 +34,8 @@ public:
m_maincpu(*this, "maincpu"),
m_crtc(*this, "crtc"),
m_via(*this, "via6522"),
m_base(*this, "base"){ }
m_base(*this, "base"),
m_expansion(*this, "expansion"){ }
DECLARE_READ16_MEMBER(applix_inputs_r);
DECLARE_WRITE16_MEMBER(applix_index_w);
@ -65,6 +62,7 @@ public:
required_device<mc6845_device> m_crtc;
required_device<via6522_device> m_via;
required_shared_ptr<UINT16> m_base;
required_shared_ptr<UINT16> m_expansion;
};
// dac-latch seems to be:
@ -145,9 +143,9 @@ WRITE8_MEMBER( applix_state::applix_pb_w )
static ADDRESS_MAP_START(applix_mem, AS_PROGRAM, 16, applix_state)
ADDRESS_MAP_UNMAP_HIGH
ADDRESS_MAP_GLOBAL_MASK(0xffffff)
AM_RANGE(0x000000, 0x07ffff) AM_RAM AM_SHARE("base")
AM_RANGE(0x080000, 0x47ffff) AM_NOP //AM_RAM // expansion
AM_RANGE(0x500000, 0x5fffff) AM_ROM
AM_RANGE(0x000000, 0x3fffff) AM_RAM AM_SHARE("expansion") // Expansion
AM_RANGE(0x400000, 0x47ffff) AM_RAM AM_MIRROR(0x80000) AM_SHARE("base") // Main ram
AM_RANGE(0x500000, 0x51ffff) AM_ROM AM_REGION("maincpu", 0)
AM_RANGE(0x600000, 0x60007f) AM_WRITE(palette_w)
AM_RANGE(0x600080, 0x6000ff) AM_WRITE(dac_latch_w)
AM_RANGE(0x600100, 0x60017f) AM_WRITE(video_latch_w) //video latch (=border colour, high nybble; video base, low nybble) (odd)
@ -189,8 +187,8 @@ INPUT_PORTS_END
void applix_state::machine_reset()
{
UINT8* RAM = memregion("maincpu")->base();
memcpy(m_base, RAM+0x500000, 16);
UINT8* ROM = memregion("maincpu")->base();
memcpy(m_expansion, ROM, 8);
m_maincpu->reset();
}
@ -325,9 +323,9 @@ MACHINE_CONFIG_END
/* ROM definition */
ROM_START( applix )
ROM_REGION(0x1000000, "maincpu", 0)
ROM_LOAD16_BYTE( "1616oshv.044", 0x500000, 0x10000, CRC(4a1a90d3) SHA1(4df504bbf6fc5dad76c29e9657bfa556500420a6) )
ROM_LOAD16_BYTE( "1616oslv.044", 0x500001, 0x10000, CRC(ef619994) SHA1(ff16fe9e2c99a1ffc855baf89278a97a2a2e881a) )
ROM_REGION(0x20000, "maincpu", 0)
ROM_LOAD16_BYTE( "1616oshv.044", 0x00000, 0x10000, CRC(4a1a90d3) SHA1(4df504bbf6fc5dad76c29e9657bfa556500420a6) )
ROM_LOAD16_BYTE( "1616oslv.044", 0x00001, 0x10000, CRC(ef619994) SHA1(ff16fe9e2c99a1ffc855baf89278a97a2a2e881a) )
ROM_REGION(0x50000, "user1", 0)
ROM_LOAD16_BYTE( "1616oshv.045", 0x00000, 0x10000, CRC(9dfb3224) SHA1(5223833a357f90b147f25826c01713269fc1945f) )