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// license:BSD-3-Clause
// copyright-holders: F. Ulivi
/*********************************************************************
hp80_optrom.cpp
Optional ROMs for HP80 systems
*********************************************************************/
#include "emu.h"
#include "hp80_optrom.h"
#include "softlist.h"
// Debugging
#define VERBOSE 1
#include "logmacro.h"
DEFINE_DEVICE_TYPE(HP80_OPTROM, hp80_optrom_device, "hp80_optrom", "HP80 optional ROM")
// +------------------+
// |hp80_optrom_device|
// +------------------+
hp80_optrom_device::hp80_optrom_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, HP80_OPTROM, tag, owner, clock),
device_image_interface(mconfig, *this),
m_select_code(0)
{
}
hp80_optrom_device::~hp80_optrom_device()
{
}
void hp80_optrom_device::install_read_handler(address_space& space)
{
if (loaded_through_softlist()) {
offs_t start = (offs_t)m_select_code * HP80_OPTROM_SIZE;
space.install_rom(start , start + HP80_OPTROM_SIZE - 1 , get_software_region("rom"));
}
}
void hp80_optrom_device::device_start()
{
}
image_init_result hp80_optrom_device::call_load()
{
LOG("hp80_optrom: call_load\n");
if (!loaded_through_softlist()) {
LOG("hp80_optrom: must be loaded from sw list\n");
return image_init_result::FAIL;
}
const char *sc_feature = get_feature("sc");
if (sc_feature == nullptr) {
LOG("hp80_optrom: no 'sc' feature\n");
return image_init_result::FAIL;
}
unsigned sc;
if (sc_feature[ 0 ] != '0' || sc_feature[ 1 ] != 'x' || sscanf(&sc_feature[ 2 ] , "%x" , &sc) != 1) {
LOG("hp80_optrom: can't parse 'sc' feature\n");
return image_init_result::FAIL;
}
// Valid SC values: 0x01..0xff
if (sc < 1 || sc > 0xff) {
LOG("hp80_optrom: illegal select code (%x)\n" , sc);
return image_init_result::FAIL;
}
auto length = get_software_region_length("rom");
if (length != HP80_OPTROM_SIZE) {
LOG("hp80_optrom: illegal region length (%x)\n" , length);
return image_init_result::FAIL;
}
LOG("hp80_optrom: loaded SC=0x%02x\n" , sc);
m_select_code = sc;
return image_init_result::PASS;
}
void hp80_optrom_device::call_unload()
{
LOG("hp80_optrom: call_unload\n");
machine().schedule_soft_reset();
}
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