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vt220: Better idea of DUART mapping (nw)

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This commit is contained in:
AJR 2018-01-03 01:32:56 -05:00
parent 0c93d83e19
commit 2ffa5756d6
1 changed files with 6 additions and 1 deletions
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7
src/mame/drivers/vt220.cpp
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@ -15,6 +15,8 @@
#include "cpu/mcs51/mcs51.h"
#include "machine/mc68681.h"
#include "machine/ram.h"
//#include "machine/x2212.h"
//#include "video/crt9007.h"
#include "screen.h"
@ -39,8 +41,10 @@ static ADDRESS_MAP_START(vt220_mem, AS_PROGRAM, 8, vt220_state)
ADDRESS_MAP_END
static ADDRESS_MAP_START(vt220_io, AS_IO, 8, vt220_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x2000, 0x2fff) AM_MIRROR(0xc000) AM_RAM
AM_RANGE(0x3000, 0x300f) AM_MIRROR(0xc7f0) AM_DEVREADWRITE("duart", scn2681_device, read, write)
AM_RANGE(0x3800, 0x380f) AM_MIRROR(0xc7f0) AM_DEVREADWRITE("duart", scn2681_device, read, write)
AM_RANGE(MCS51_PORT_P1, MCS51_PORT_P1) AM_READNOP
ADDRESS_MAP_END
/* Input ports */
@ -69,6 +73,7 @@ static MACHINE_CONFIG_START( vt220 )
MCFG_CPU_IO_MAP(vt220_io)
MCFG_DEVICE_ADD("duart", SCN2681, XTAL_3_6864MHz)
MCFG_MC68681_IRQ_CALLBACK(INPUTLINE("maincpu", MCS51_INT1_LINE))
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)