// license:BSD-3-Clause // copyright-holders:David Haywood #include "emu.h" #include "elan_eu3a14sys.h" // DMA size and destination are 24-bit here, they're 16-bit on EU3A05 DEFINE_DEVICE_TYPE(ELAN_EU3A14_SYS, elan_eu3a14sys_device, "elan_eu3a14sys", "Elan EU3A14 System") elan_eu3a14sys_device::elan_eu3a14sys_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : elan_eu3a05commonsys_device(mconfig, ELAN_EU3A14_SYS, tag, owner, clock), device_memory_interface(mconfig, *this), m_space_config("regs", ENDIANNESS_NATIVE, 8, 5, 0, address_map_constructor(FUNC(elan_eu3a14sys_device::map), this)) { } device_memory_interface::space_config_vector elan_eu3a14sys_device::memory_space_config() const { return space_config_vector { std::make_pair(0, &m_space_config) }; } void elan_eu3a14sys_device::map(address_map& map) { elan_eu3a05commonsys_device::map(map); // 00 - 0e map(0x0f, 0x17).rw(FUNC(elan_eu3a14sys_device::dma_param_r), FUNC(elan_eu3a14sys_device::dma_param_w)); map(0x18, 0x18).rw(FUNC(elan_eu3a14sys_device::dma_trigger_r), FUNC(elan_eu3a14sys_device::dma_trigger_w)); // 5019 - 46 on startup (hnt3) 22 (bb3, foot) na (gtg) 09 (rsg) // 501a - 01 on startup (hnt3) 03 (bb3, foot) na (gtg) 02,01 (rsg) } void elan_eu3a14sys_device::device_start() { elan_eu3a05commonsys_device::device_start(); save_item(NAME(m_dmaparams)); } void elan_eu3a14sys_device::device_reset() { elan_eu3a05commonsys_device::device_reset(); for (int i = 0; i < 9; i++) m_dmaparams[i] = 0x00; } uint8_t elan_eu3a14sys_device::dma_param_r(offs_t offset) { return m_dmaparams[offset]; } void elan_eu3a14sys_device::dma_param_w(offs_t offset, uint8_t data) { m_dmaparams[offset] = data; } uint8_t elan_eu3a14sys_device::dma_trigger_r() { logerror("%s: dma_trigger_r\n", machine().describe_context()); return 0; } void elan_eu3a14sys_device::dma_trigger_w(uint8_t data) { uint32_t dmasrc = (m_dmaparams[2] << 16) | (m_dmaparams[1] << 8) | (m_dmaparams[0] << 0); uint32_t dmadst = (m_dmaparams[5] << 16) | (m_dmaparams[4] << 8) | (m_dmaparams[3] << 0); uint32_t dmalen = (m_dmaparams[8] << 16) | (m_dmaparams[7] << 8) | (m_dmaparams[6] << 0); //logerror("%s: dma_trigger_w %02x (src %08x dst %08x size %08x)\n", machine().describe_context(), data, dmasrc, dmadst, dmalen); address_space& fullbankspace = m_bank->space(AS_PROGRAM); address_space& destspace = m_cpu->space(AS_PROGRAM); if (data == 0x08) { for (int i = 0; i < dmalen; i++) { uint8_t dat = fullbankspace.read_byte(dmasrc + i); destspace.write_byte(dmadst + i, dat); } } else { logerror("UNKNOWN DMA TRIGGER VALUE\n"); } }