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ax80 : added roms, notes, and flesh.

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This commit is contained in:
Robbbert 2017-10-21 04:21:55 +11:00
parent 4a12b28ba5
commit 4ad2b2bd1d
1 changed files with 48 additions and 18 deletions
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66
src/mame/drivers/akaiax80.cpp
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@ -21,12 +21,26 @@
Service manual incl. schematics at:
https://archive.org/download/AkaiAX80ServiceManual/Akai%20AX80%20Service%20Manual.pdf
There's a 2nd UPD7811 (IC1) to scan the keyboard. Its internal rom is undumped.
Ports A/B/C go to the keyboard, Port D (d0-6) connects 1-to-1 to Port A of IC2
(Main CPU). Ports F and AN are unused. PD7 goes to /INT2 of IC2, /NMI goes to PA7
of IC2.
Both CPUs are hardwired as MODE 1, and both share a CSA120MT crystal.
RAM is backed up by a CR2430-T battery.
A crystal, type HC-16, (6,554,800Hz) generates various frequencies to drive the PITs
and the 8279. Later production used a 6,553,600Hz instead.
****************************************************************************/
#include "emu.h"
#include "cpu/upd7810/upd7810.h"
#include "machine/pit8253.h"
#include "machine/i8255.h"
#include "machine/i8279.h"
#define PIT0_TAG "pit0"
#define PIT1_TAG "pit1"
@ -41,15 +55,13 @@ class ax80_state : public driver_device
{
public:
ax80_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu")
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
{ }
required_device<upd7810_device> m_maincpu;
private:
virtual void machine_reset() override;
public:
required_device<upd7810_device> m_maincpu;
};
void ax80_state::machine_reset()
@ -58,16 +70,21 @@ void ax80_state::machine_reset()
static ADDRESS_MAP_START( ax80_map, AS_PROGRAM, 8, ax80_state )
AM_RANGE(0x0000, 0x0fff) AM_ROM AM_REGION("maincpu", 0) // internal ROM
AM_RANGE(0x1000, 0x1003) AM_DEVREADWRITE(PIT0_TAG, pit8253_device, read, write)
AM_RANGE(0x1010, 0x1013) AM_DEVREADWRITE(PIT1_TAG, pit8253_device, read, write)
AM_RANGE(0x1020, 0x1023) AM_DEVREADWRITE(PIT2_TAG, pit8253_device, read, write)
AM_RANGE(0x1030, 0x1033) AM_DEVREADWRITE(PIT3_TAG, pit8253_device, read, write)
AM_RANGE(0x1040, 0x1043) AM_DEVREADWRITE(PIT4_TAG, pit8253_device, read, write)
AM_RANGE(0x1050, 0x1053) AM_DEVREADWRITE(PIT5_TAG, pit8253_device, read, write)
AM_RANGE(0x1060, 0x1063) AM_DEVREADWRITE(PPI0_TAG, i8255_device, read, write)
AM_RANGE(0x1070, 0x1073) AM_DEVREADWRITE(PPI1_TAG, i8255_device, read, write)
AM_RANGE(0x4000, 0x5fff) AM_ROM AM_REGION("maincpu", 0x1000) // external program EPROM
AM_RANGE(0xc000, 0xc7ff) AM_RAM
AM_RANGE(0x1000, 0x1003) AM_MIRROR(0x000c) AM_DEVREADWRITE(PIT0_TAG, pit8253_device, read, write) // IC20
AM_RANGE(0x1010, 0x1013) AM_MIRROR(0x000c) AM_DEVREADWRITE(PIT1_TAG, pit8253_device, read, write) // IC21
AM_RANGE(0x1020, 0x1023) AM_MIRROR(0x000c) AM_DEVREADWRITE(PIT2_TAG, pit8253_device, read, write) // IC22
AM_RANGE(0x1030, 0x1033) AM_MIRROR(0x000c) AM_DEVREADWRITE(PIT3_TAG, pit8253_device, read, write) // IC23
AM_RANGE(0x1040, 0x1043) AM_MIRROR(0x000c) AM_DEVREADWRITE(PIT4_TAG, pit8253_device, read, write) // IC24
AM_RANGE(0x1050, 0x1053) AM_MIRROR(0x000c) AM_DEVREADWRITE(PIT5_TAG, pit8253_device, read, write) // IC25
AM_RANGE(0x1060, 0x1060) AM_MIRROR(0x000e) AM_DEVREADWRITE("kdc", i8279_device, data_r, data_w) // IC11
AM_RANGE(0x1061, 0x1061) AM_MIRROR(0x000e) AM_DEVREADWRITE("kdc", i8279_device, status_r, cmd_w) // IC11
AM_RANGE(0x1070, 0x1073) AM_MIRROR(0x000c) AM_DEVREADWRITE(PPI1_TAG, i8255_device, read, write) // IC10
//AM_RANGE(0x2000, 0x2001) AM_MIRROR(0x0dfe) AM_DEVREADWRITE(PPI0_TAG, i8255_device, read, write) // IC9 - A9 connects to A1-pin
//AM_RANGE(0x2200, 0x2201) AM_MIRROR(0x0dfe) AM_DEVREADWRITE(PPI0_TAG, i8255_device, read, write) // IC9 - A9 connects to A1-pin
//AM_RANGE(0x3000, 0x3fff) // steers audio to the various voice channels
AM_RANGE(0x4000, 0x5fff) AM_MIRROR(0x2000) AM_ROM AM_REGION("maincpu", 0x1000) // external program EPROM
AM_RANGE(0x8000, 0x87ff) AM_MIRROR(0x3800) AM_RAM
AM_RANGE(0xc000, 0xc7ff) AM_MIRROR(0x3800) AM_RAM
ADDRESS_MAP_END
static MACHINE_CONFIG_START( ax80 )
@ -84,6 +101,14 @@ static MACHINE_CONFIG_START( ax80 )
MCFG_DEVICE_ADD(PPI0_TAG, I8255A, 0)
MCFG_DEVICE_ADD(PPI1_TAG, I8255A, 0)
MCFG_DEVICE_ADD("kdc", I8279, 6554800 / 8) // Keyboard/Display Controller
//MCFG_I8279_OUT_IRQ_CB(INPUTLINE("maincpu", UPD7810_INTF1)) // irq
//MCFG_I8279_OUT_SL_CB(WRITE8(ax80_state, scanlines_w)) // scan SL lines
//MCFG_I8279_OUT_DISP_CB(WRITE8(ax80_state, digit_w)) // display A&B
//MCFG_I8279_IN_RL_CB(READ8(ax80_state, kbd_r)) // kbd RL lines
//MCFG_I8279_IN_SHIFT_CB(VCC) // not connected
//MCFG_I8279_IN_CTRL_CB(VCC) // not connected
MACHINE_CONFIG_END
static INPUT_PORTS_START( ax80 )
@ -92,9 +117,14 @@ INPUT_PORTS_END
ROM_START( ax80 )
ROM_REGION(0x3000, "maincpu", 0)
// CPU internal mask
ROM_LOAD( "akai ax80 main cpu mask rom.bin", 0x000000, 0x001000, CRC(241c078f) SHA1(7f5d0d718f2d03ec446568ae440beaff0aac6bfd) )
ROM_LOAD( "akai ax80 main cpu mask rom.ic2", 0x000000, 0x001000, CRC(241c078f) SHA1(7f5d0d718f2d03ec446568ae440beaff0aac6bfd) )
// external program EPROM
ROM_LOAD( "akai ax80 (rev k) rom.bin", 0x001000, 0x002000, CRC(a2f95ccf) SHA1(4e5f2c4c9a08ec1d38146cae786b400261a3dbb7) )
ROM_SYSTEM_BIOS( 0, "k", "REV.K" )
ROMX_LOAD( "AX-80K.ic4", 0x001000, 0x002000, CRC(a2f95ccf) SHA1(4e5f2c4c9a08ec1d38146cae786b400261a3dbb7), ROM_BIOS(1) )
ROM_SYSTEM_BIOS( 1, "l", "REV.L" )
ROMX_LOAD( "AX-80L.ic4", 0x001000, 0x002000, CRC(bc3d21bd) SHA1(d6730ec33b28e705a0ff88946b7860fadcc37793), ROM_BIOS(2) )
ROM_SYSTEM_BIOS( 2, "i", "REV.I" )
ROMX_LOAD( "AX-80I.ic4", 0x001000, 0x002000, CRC(d616e435) SHA1(84820522e6a96fc29966f82e76254e54df15d7e6), ROM_BIOS(3) )
ROM_END
CONS( 1984, ax80, 0, 0, ax80, ax80, ax80_state, 0, "Akai", "AX80", MACHINE_NOT_WORKING | MACHINE_NO_SOUND )