From 4ad2b2bd1d2c233bf859fdd70d374a1630ca134f Mon Sep 17 00:00:00 2001 From: Robbbert Date: Sat, 21 Oct 2017 04:21:55 +1100 Subject: ax80 : added roms, notes, and flesh. --- src/mame/drivers/akaiax80.cpp | 66 +++++++++++++++++++++++++++++++------------ 1 file changed, 48 insertions(+), 18 deletions(-) diff --git a/src/mame/drivers/akaiax80.cpp b/src/mame/drivers/akaiax80.cpp index f5a12d40c23..3070afb8aaa 100644 --- a/src/mame/drivers/akaiax80.cpp +++ b/src/mame/drivers/akaiax80.cpp @@ -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 m_maincpu; - +private: virtual void machine_reset() override; - -public: + required_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 ) -- cgit v1.2.3