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la120: Hook up ER1400 (nw)

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This commit is contained in:
AJR 2017-12-31 12:35:56 -05:00
parent a057b79e37
commit 6b07fa531e
1 changed files with 16 additions and 4 deletions
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20
src/mame/drivers/decwritr.cpp
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@ -12,6 +12,7 @@
#include "emu.h"
#include "cpu/i8085/i8085.h"
#include "machine/er1400.h"
#include "machine/i8251.h"
#include "sound/beep.h"
#include "render.h"
@ -33,13 +34,14 @@ public:
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_speaker(*this, "beeper"),
m_uart(*this, "i8251")
m_uart(*this, "i8251"),
m_nvm(*this, "nvm")
{
}
required_device<cpu_device> m_maincpu;
required_device<beep_device> m_speaker;
required_device<i8251_device> m_uart;
//required_device<generic_terminal_device> m_terminal;
required_device<er1400_device> m_nvm;
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
bitmap.fill(rgb_t::black(), cliprect);
@ -124,7 +126,6 @@ WRITE8_MEMBER( decwriter_state::la120_LED_w )
(m_led_array&0x1)?"PAPER OUT":"---------" );
}
/* todo: er1400 device */
/* control lines:
3 2 1
0 0 0 Standby
@ -138,11 +139,20 @@ WRITE8_MEMBER( decwriter_state::la120_LED_w )
*/
READ8_MEMBER( decwriter_state::la120_NVR_r )
{
return 0xFF;
return (m_nvm->data_r() << 7) | 0x7e;
}
WRITE8_MEMBER( decwriter_state::la120_NVR_w )
{
// ER1400 has negative logic, but 7406 inverters are used
m_nvm->c3_w(BIT(offset, 10));
m_nvm->c2_w(BIT(offset, 9));
m_nvm->c1_w(BIT(offset, 8));
// C2 is used to disable pullup on data line
m_nvm->data_w(!BIT(offset, 9) ? 0 : BIT(data, 7));
m_nvm->clock_w(BIT(offset, 0));
}
/* todo: fully reverse engineer DC305 ASIC */
@ -417,6 +427,8 @@ static MACHINE_CONFIG_START( la120 )
MCFG_COM8116_FR_HANDLER(DEVWRITELINE("i8251", i8251_device, write_rxc))
MCFG_COM8116_FT_HANDLER(DEVWRITELINE("i8251", i8251_device, write_txc))
*/
MCFG_DEVICE_ADD("nvm", ER1400, 0)
MACHINE_CONFIG_END