// license:BSD-3-Clause // copyright-holders:David Haywood #include "emu.h" #include "elan_ep3a19asys.h" // like EU3A05 but with the DMA at a lower address where the code bank register would usually be, and a single byte for bank register rather than 2 - any other changes? DEFINE_DEVICE_TYPE(ELAN_EP3A19A_SYS, elan_ep3a19asys_device, "elan_ep3a19asys", "Elan EP3A19A System") elan_ep3a19asys_device::elan_ep3a19asys_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : elan_eu3a05commonsys_device(mconfig, ELAN_EP3A19A_SYS, tag, owner, clock), device_memory_interface(mconfig, *this), m_space_config("regs", ENDIANNESS_NATIVE, 8, 5, 0, address_map_constructor(FUNC(elan_ep3a19asys_device::map), this)) { } device_memory_interface::space_config_vector elan_ep3a19asys_device::memory_space_config() const { return space_config_vector { std::make_pair(0, &m_space_config) }; } void elan_ep3a19asys_device::rombank_w(offs_t offset, uint8_t data) { m_rombank_lo = data; m_bank->set_bank(m_rombank_lo); } uint8_t elan_ep3a19asys_device::rombank_r(offs_t offset) { return m_rombank_lo; } void elan_ep3a19asys_device::map(address_map& map) { // elan_eu3a05commonsys_device::map(map); // 00 - 0e map(0x0c, 0x0c).rw(FUNC(elan_ep3a19asys_device::rombank_r), FUNC(elan_ep3a19asys_device::rombank_w)); map(0x0d, 0x13).rw(FUNC(elan_ep3a19asys_device::dma_param_r), FUNC(elan_ep3a19asys_device::dma_param_w)); map(0x14, 0x14).rw(FUNC(elan_ep3a19asys_device::elan_eu3a05_dmatrg_r), FUNC(elan_ep3a19asys_device::elan_eu3a05_dmatrg_w)); } void elan_ep3a19asys_device::device_start() { elan_eu3a05commonsys_device::device_start(); save_item(NAME(m_dmaparams)); } void elan_ep3a19asys_device::device_reset() { elan_eu3a05commonsys_device::device_reset(); for (int i = 0; i < 7; i++) m_dmaparams[i] = 0x00; } uint8_t elan_ep3a19asys_device::dma_param_r(offs_t offset) { return m_dmaparams[offset]; } void elan_ep3a19asys_device::dma_param_w(offs_t offset, uint8_t data) { m_dmaparams[offset] = data; } uint8_t elan_ep3a19asys_device::elan_eu3a05_dmatrg_r() { logerror("%s: elan_eu3a05_dmatrg_r (DMA operation state?)\n", machine().describe_context()); return 0x00;//m_dmatrg_data; } void elan_ep3a19asys_device::elan_eu3a05_dmatrg_w(uint8_t data) { logerror("%s: elan_eu3a05_dmatrg_w (trigger DMA operation) %02x\n", machine().describe_context(), data); //m_dmatrg_data = data; address_space& fullbankspace = m_bank->space(AS_PROGRAM); address_space& destspace = m_cpu->space(AS_PROGRAM); if (data) { int src = (m_dmaparams[0]) | (m_dmaparams[1] << 8) | (m_dmaparams[2] << 16); uint16_t dest = m_dmaparams[3] | (m_dmaparams[4] << 8); uint16_t size = m_dmaparams[5] | (m_dmaparams[6] << 8); logerror(" Doing %02x DMA %06x to %04x size %04x\n", data, src, dest, size); for (int i = 0; i < size; i++) { uint8_t dat = fullbankspace.read_byte(src); src++; destspace.write_byte(dest, dat); dest++; } m_dmaparams[0] = src & 0xff; m_dmaparams[1] = (src >> 8) & 0xff; m_dmaparams[2] = (src >> 16) & 0xff; m_dmaparams[3] = dest & 0xff; m_dmaparams[4] = (dest >> 8) & 0xff; m_dmaparams[5] = 0; m_dmaparams[6] = 0; } }