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ec1840, ec1841: clean up memory options

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This commit is contained in:
Sergey Svishchev 2014-03-29 23:30:31 +04:00
parent 27f2992c94
commit bb79ad3151
1 changed files with 25 additions and 30 deletions
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55
src/mame/drivers/ec184x.c
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@ -6,12 +6,6 @@
Driver file for EC-184x series
TODO (ec1840)
- memory bank size is smaller (128K)
TODO (ec1841)
- hard disk is connected but requires changes to isa_hdc.c
***************************************************************************/
@ -24,6 +18,8 @@
#include "cpu/i86/i86.h"
#include "machine/ram.h"
#define EC1841_MEMBOARD_SIZE 512*1024
#define VERBOSE_DBG 1 /* general debug messages */
#define DBG_LOG(N,M,A) \
@ -48,12 +44,11 @@ public:
required_device<cpu_device> m_maincpu;
DECLARE_MACHINE_RESET(ec184x);
DECLARE_DRIVER_INIT(ec184x);
DECLARE_DRIVER_INIT(ec1841);
struct {
UINT8 enable[4];
int boards;
int board_size;
} m_memory;
DECLARE_READ8_MEMBER(memboard_r);
@ -109,13 +104,13 @@ WRITE8_MEMBER(ec184x_state::memboard_w)
if (BIT(current, 2) && !BIT(data, 2)) {
// disable read access
program.unmap_read(0, m_memory.board_size-1);
program.unmap_read(0, EC1841_MEMBOARD_SIZE-1);
DBG_LOG(1,"ec1841_memboard_w",("unmap_read(%d)\n", offset));
}
if (BIT(current, 3) && !BIT(data, 3)) {
// disable write access
program.unmap_write(0, 0x7ffff);
program.unmap_write(0, EC1841_MEMBOARD_SIZE-1);
DBG_LOG(1,"ec1841_memboard_w",("unmap_write(%d)\n", offset));
}
@ -123,8 +118,8 @@ WRITE8_MEMBER(ec184x_state::memboard_w)
for(int i=0; i<4; i++)
m_memory.enable[i] &= 0xfb;
// enable read access
membank("bank10")->set_base(m_ram->pointer() + offset*0x80000);
program.install_read_bank(0, m_memory.board_size-1, "bank10");
membank("bank10")->set_base(m_ram->pointer() + offset*EC1841_MEMBOARD_SIZE);
program.install_read_bank(0, EC1841_MEMBOARD_SIZE-1, "bank10");
DBG_LOG(1,"ec1841_memboard_w",("map_read(%d)\n", offset));
}
@ -132,26 +127,32 @@ WRITE8_MEMBER(ec184x_state::memboard_w)
for(int i=0; i<4; i++)
m_memory.enable[i] &= 0xf7;
// enable write access
membank("bank20")->set_base(m_ram->pointer() + offset*0x80000);
program.install_write_bank(0, m_memory.board_size-1, "bank20");
membank("bank20")->set_base(m_ram->pointer() + offset*EC1841_MEMBOARD_SIZE);
program.install_write_bank(0, EC1841_MEMBOARD_SIZE-1, "bank20");
DBG_LOG(1,"ec1841_memboard_w",("map_write(%d)\n", offset));
}
m_memory.enable[offset] = data;
}
DRIVER_INIT_MEMBER( ec184x_state, ec184x )
DRIVER_INIT_MEMBER( ec184x_state, ec1841 )
{
address_space &program = m_maincpu->space(AS_PROGRAM);
ram_device *m_ram = machine().device<ram_device>(RAM_TAG);
m_memory.board_size = 512 * 1024; // XXX
m_memory.boards = m_ram->size()/m_memory.board_size - 1;
m_memory.boards = m_ram->size()/EC1841_MEMBOARD_SIZE - 1;
if (m_memory.boards > 3)
m_memory.boards = 3;
program.install_read_bank(0, m_memory.board_size-1, "bank10");
program.install_write_bank(0, m_memory.board_size-1, "bank20");
// 640K configuration is special -- 512K board mapped at 0 + 128K board mapped at 512K
// XXX verify this was actually the case
if (m_ram->size() == 640*1024) {
program.install_read_bank(0, m_ram->size()-1, "bank10");
program.install_write_bank(0, m_ram->size()-1, "bank20");
} else {
program.install_read_bank(0, EC1841_MEMBOARD_SIZE-1, "bank10");
program.install_write_bank(0, EC1841_MEMBOARD_SIZE-1, "bank20");
}
membank( "bank10" )->set_base( m_ram->pointer() );
membank( "bank20" )->set_base( m_ram->pointer() );
}
@ -271,8 +272,8 @@ static MACHINE_CONFIG_START( ec1841, ec184x_state )
MCFG_PC_KBDC_SLOT_ADD("mb:pc_kbdc", "kbd", pc_xt_keyboards, STR_KBD_EC_1841)
MCFG_RAM_ADD(RAM_TAG)
MCFG_RAM_DEFAULT_SIZE("512K")
MCFG_RAM_EXTRA_OPTIONS("1024K,1576K,2048K") // 640K variant not emulated
MCFG_RAM_DEFAULT_SIZE("640K")
MCFG_RAM_EXTRA_OPTIONS("512K,1024K,1576K,2048K")
MACHINE_CONFIG_END
// XXX verify everything
@ -374,14 +375,8 @@ ROM_START( ec1847 )
ROM_LOAD( "317_d28_2732.bin", 0x00000, 0x1000, CRC(8939599b) SHA1(53d02460cf93596882a96758ef4bac5fa1ce55b2)) // monochrome font
ROM_END
/***************************************************************************
Game driver(s)
***************************************************************************/
/* YEAR ROM NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME */
COMP ( 1987, ec1840, ibm5150, 0, ec1840, ec1841, ec184x_state, ec184x, "<unknown>", "EC-1840", MACHINE_NOT_WORKING)
COMP ( 1987, ec1841, ibm5150, 0, ec1841, ec1841, ec184x_state, ec184x, "<unknown>", "EC-1841", 0)
COMP ( 1989, ec1845, ibm5150, 0, ec1841, ec1841, ec184x_state, ec184x, "<unknown>", "EC-1845", MACHINE_NOT_WORKING)
COMP ( 1987, ec1840, ibm5150, 0, ec1840, ec1841, driver_device, 0, "<unknown>", "EC-1840", MACHINE_NOT_WORKING)
COMP ( 1987, ec1841, ibm5150, 0, ec1841, ec1841, ec184x_state, ec1841, "<unknown>", "EC-1841", 0)
COMP ( 1989, ec1845, ibm5150, 0, ec1841, ec1841, ec184x_state, ec1841, "<unknown>", "EC-1845", MACHINE_NOT_WORKING)
COMP ( 1990, ec1847, ibm5150, 0, ec1847, ec1841, driver_device, 0, "<unknown>", "EC-1847", MACHINE_NOT_WORKING)