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Some notes on the AlphaSmart Pro machine

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This commit is contained in:
Angelo Salese 2012-11-14 03:53:36 +00:00
parent fab4341819
commit 4001cf85df
2 changed files with 26 additions and 9 deletions
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34
src/mess/drivers/alphasma.c
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@ -4,10 +4,16 @@
08/28/2012 Skeleton driver
TODO:
- define video HW capabilities
- "Addr. Bus RAM error" string read, presumably memory mapped RAM at 0x8000
is actually a r/w bank register.
****************************************************************************/
#include "emu.h"
#include "cpu/mc68hc11/mc68hc11.h"
#include "video/hd44780.h"
#include "rendlay.h"
class alphasmart_state : public driver_device
@ -20,11 +26,14 @@ public:
required_device<cpu_device> m_maincpu;
DECLARE_WRITE8_MEMBER(vram_w);
virtual void machine_start();
virtual void palette_init();
virtual UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
// virtual UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
};
static ADDRESS_MAP_START(alphasmart_mem, AS_PROGRAM, 8, alphasmart_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE( 0x0000, 0x7fff ) AM_RAM
@ -32,6 +41,8 @@ static ADDRESS_MAP_START(alphasmart_mem, AS_PROGRAM, 8, alphasmart_state)
ADDRESS_MAP_END
static ADDRESS_MAP_START(alphasmart_io, AS_IO, 8, alphasmart_state)
// AM_RANGE(MC68HC11_IO_PORTA, MC68HC11_IO_PORTA) AM_DEVREADWRITE("hd44780", hd44780_device, control_read, control_write)
// AM_RANGE(MC68HC11_IO_PORTD, MC68HC11_IO_PORTD) AM_DEVREADWRITE("hd44780", hd44780_device, data_read, data_write)
ADDRESS_MAP_END
/* Input ports */
@ -48,11 +59,6 @@ void alphasmart_state::machine_start()
{
}
UINT32 alphasmart_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
return 0;
}
static const hc11_config alphasmart_hc11_config =
{
0, //has extended internal I/O
@ -60,19 +66,28 @@ static const hc11_config alphasmart_hc11_config =
0x00 //registers are at 0-0x3f
};
static HD44780_INTERFACE( alphasmart_4line_display )
{
4, // number of lines
16, // chars for line
NULL // pixel update callback
};
static MACHINE_CONFIG_START( alphasmart, alphasmart_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", MC68HC11, XTAL_8MHz/2) // MC68HC11D0, XTAL is 8 Mhz, unknown divider
MCFG_CPU_PROGRAM_MAP(alphasmart_mem)
MCFG_CPU_IO_MAP(alphasmart_io)
MCFG_CPU_CONFIG(alphasmart_hc11_config)
MCFG_CPU_PERIODIC_INT_DRIVER(alphasmart_state, irq0_line_hold, 50)
// MCFG_CPU_PERIODIC_INT_DRIVER(alphasmart_state, irq0_line_hold, 50)
MCFG_HD44780_ADD("hd44780", alphasmart_4line_display)
/* video hardware */
MCFG_SCREEN_ADD("screen", LCD)
MCFG_SCREEN_REFRESH_RATE(50)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
MCFG_SCREEN_UPDATE_DRIVER(alphasmart_state, screen_update)
MCFG_SCREEN_UPDATE_DEVICE("hd44780", hd44780_device, screen_update)
MCFG_SCREEN_SIZE(6*40, 9*4)
MCFG_SCREEN_VISIBLE_AREA(0, (6*40)-1, 0, (9*4)-1)
MCFG_PALETTE_LENGTH(2)
@ -83,6 +98,9 @@ MACHINE_CONFIG_END
ROM_START( alphasma )
ROM_REGION( 0x8000, "maincpu", 0 )
ROM_LOAD( "alphasmartpro212.rom", 0x0000, 0x8000, CRC(896ddf1c) SHA1(c3c6a421c9ced92db97431d04b4a3f09a39de716) ) // Checksum 8D24 on label
ROM_REGION( 0x0860, "hd44780", ROMREGION_ERASE )
ROM_LOAD( "44780a00.bin", 0x0000, 0x0860, BAD_DUMP CRC(3a89024c) SHA1(5a87b68422a916d1b37b5be1f7ad0b3fb3af5a8d))
ROM_END

1
src/mess/drivers/pc8801.c
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@ -1898,7 +1898,6 @@ ADDRESS_MAP_END
TIMER_CALLBACK_MEMBER(pc8801_state::pc8801fd_upd765_tc_to_zero)
{
//printf("0\n");
machine().device<upd765a_device>("upd765")->tc_w(false);
}