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eag68k: improve usart connection

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This commit is contained in:
hap 2023-09-17 21:25:22 +02:00
parent 4997d62163
commit 877c4a4079
2 changed files with 14 additions and 11 deletions
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2
src/mame/cxg/sphinx40.cpp
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@ -3,7 +3,7 @@
// thanks-to:Berger
/*******************************************************************************
CXG Sphinx 40 / 50
CXG "Adversary" Sphinx 40 / 50
This is a modular chesscomputer, similar to Mephisto's 3-drawers one.
Chesscomputer on the right, LCD in the middle, and future expansion on the left.

23
src/mame/fidelity/eag68k.cpp
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@ -10,7 +10,6 @@ Excel 68000 I/O is very similar to EAG, so it's handled in this driver as well
TODO:
- unemulated waitstates with DTACK
- EAG USART doesn't work right? it should be able to connect to a serial printer
- V10 CPU emulation is too slow, MAME 68040 opcode timing is same as 68030 but in
reality it is much faster, same goes for V11 of course (see note below)
- V11 CPU should be M68EC060, not yet emulated. Now using M68EC040 in its place
@ -81,9 +80,12 @@ The module slot pinout is different from SCC series. The data on those appears
to be compatible with EAG though and will load fine with an adapter.
The USART allows for a serial connection between the chess computer and another
device, for example a PC. Fidelity released a DOS tool called EAGLINK which
featured PC printer support, complete I/O control, detailed information while
the program is 'thinking', etc. It can be enabled with POP3 H3.
device, for example the Fidelity Challenger Printer, or a PC. It expects a baud
rate of 600.
Fidelity released a DOS tool called EAGLINK which featured PC printer support,
complete I/O control, detailed information while the program is 'thinking', etc.
It can be enabled with POP3 H3.
Memory map: (of what is known)
-----------
@ -118,10 +120,9 @@ supposedly has the same program as V10.
V7 Hardware info:
-----------------
- MC68020RC25E CPU, 25MHz XTAL - this PCB was overclocked, original was 20MHz so let's use that
- 4*AS7C164-20PC 8KB SRAM, 2*KM684000ALG-7L 512KB CMOS SRAM
- 2*27C512? 64KB EPROM, 2*HM6264LP-15 8KB SRAM, 2*AT28C64B 8KB EEPROM, 2*GAL16V8C
- same as 6114: M82C51A, NE555, SN74HC4060, module slot, chessboard, ..
- 510.1139A01 daughterboard with MC68020RC20E or MC68020RC25E @ 20MHz,
and 32KB RAM (4*MCM6264P35)
- rest is same as 6114
V7 Memory map:
--------------
@ -735,11 +736,13 @@ void eag_state::eag_base(machine_config &config)
I8251(config, m_usart, 4.9152_MHz_XTAL);
m_usart->txd_handler().set("rs232", FUNC(rs232_port_device::write_txd));
m_usart->rts_handler().set("rs232", FUNC(rs232_port_device::write_rts));
m_usart->rxrdy_handler().set_inputline(m_maincpu, M68K_IRQ_IPL2);
auto &usart_clock(CLOCK(config, "usart_clock", 4.9152_MHz_XTAL / 128)); // 4060 Q7, 38.4kHz
usart_clock.signal_handler().set(m_usart, FUNC(i8251_device::write_txc));
auto &rs232(RS232_PORT(config, "rs232", default_rs232_devices, nullptr));
rs232.rxd_handler().set(m_usart, FUNC(i8251_device::write_rxd));
rs232.cts_handler().set(m_usart, FUNC(i8251_device::write_cts));
SENSORBOARD(config, m_board).set_type(sensorboard_device::MAGNETS);
m_board->init_cb().set(m_board, FUNC(sensorboard_device::preset_chess));