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315_5338a: Add command readback and more serial output commands. Also always output on port writes.

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This commit is contained in:
Dirk Best 2021-05-12 17:44:02 +02:00
parent ecc6410819
commit b77e947a1c
2 changed files with 21 additions and 2 deletions
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22
src/mame/machine/315_5338a.cpp
View File

@ -57,6 +57,7 @@ void sega_315_5338a_device::device_start()
save_item(NAME(m_port_config)); save_item(NAME(m_port_config));
save_item(NAME(m_serial_output)); save_item(NAME(m_serial_output));
save_item(NAME(m_address)); save_item(NAME(m_address));
save_item(NAME(m_cmd));
} }
@ -89,6 +90,9 @@ uint8_t sega_315_5338a_device::read(offs_t offset)
// serial data read back? // serial data read back?
case 0x0a: data = m_serial_output; break; case 0x0a: data = m_serial_output; break;
// command read back?
case 0x0b: data = m_cmd; break;
// serial data input // serial data input
case 0x0c: data = m_read_cb(m_address); break; case 0x0c: data = m_read_cb(m_address); break;
@ -122,8 +126,10 @@ void sega_315_5338a_device::write(offs_t offset, uint8_t data)
case 0x05: case 0x05:
case 0x06: case 0x06:
m_port_value[offset] = data; m_port_value[offset] = data;
if (BIT(m_port_config, offset) == 0)
m_out_port_cb[offset](data); // always output, even if set to input?
// needed for bingoct sound
m_out_port_cb[offset](data);
break; break;
// port direction register (0 = output, 1 = input) // port direction register (0 = output, 1 = input)
@ -141,6 +147,7 @@ void sega_315_5338a_device::write(offs_t offset, uint8_t data)
// command register // command register
case 0x09: case 0x09:
m_cmd = data;
switch (data) switch (data)
{ {
case 0x00: case 0x00:
@ -152,11 +159,22 @@ void sega_315_5338a_device::write(offs_t offset, uint8_t data)
case 0x07: case 0x07:
m_write_cb(m_address, m_serial_output, 0xff); m_write_cb(m_address, m_serial_output, 0xff);
break; break;
case 0x70:
case 0x71:
case 0x72:
case 0x73:
case 0x74:
case 0x75:
case 0x76:
case 0x77:
m_write_cb(data & 0x07, m_serial_output, 0xff);
break;
case 0x87: case 0x87:
// sent after setting up the address and when wanting to receive serial data // sent after setting up the address and when wanting to receive serial data
break; break;
default: default:
logerror("Unknown command: %02x\n", data); logerror("Unknown command: %02x\n", data);
break;
} }
break; break;

1
src/mame/machine/315_5338a.h
View File

@ -73,6 +73,7 @@ private:
uint8_t m_port_config; uint8_t m_port_config;
uint8_t m_serial_output; uint8_t m_serial_output;
uint16_t m_address; uint16_t m_address;
uint8_t m_cmd;
}; };
// device type definition // device type definition