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chessking: add button panel note

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This commit is contained in:
hap 2022-12-28 15:09:44 +01:00
parent 1c87b11897
commit c254f1ba3c
1 changed files with 8 additions and 7 deletions
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15
src/mame/handheld/chessking.cpp
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@ -2,20 +2,21 @@
// copyright-holders:David Haywood, hap
/*
Chess King, LCD handheld presumably from Taiwan
Chess King (棋王之王), LCD handheld presumably from Taiwan.
Hold down u+d+l+r buttons at boot to enter a test/data clear mode of sorts.
TODO:
- lots of unknown writes
- sound emulation is guessed
- LCD chip(s) is not emulated, maybe the I/O chip does a DMA from main RAM to the LCD?
- LCD chip(s) is not emulated, maybe the I/O chip does a DMA from RAM to the LCD?
- chess game makes an illegal move sometimes, BTANB?
Hardware notes:
Main:
- PCB label: TD-24
- NEC D70108HG-10 V20, 9.600MHz XTAL
- 64KB ROM (2*SRM20256), 256KB ROM (custom label)
- 64KB RAM (2*SRM20256), 256KB ROM (custom label)
- unknown 80 pin QFP, label CCH01 ET-MATE F3X0 713, assume custom I/O chip
- 1-bit sound
- cartridge slot
@ -296,10 +297,10 @@ void chessking_state::chesskng_io(address_map &map)
static INPUT_PORTS_START( chesskng )
PORT_START("BUTTONS")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_SELECT )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON2 ) // A
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON1 ) // B
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_SELECT ) // SELECT / 選擇
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START ) // START / 啓動
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON2 ) // A / 確認 (confirm)
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON1 ) // B / 回位 (return)
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_16WAY
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_16WAY
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_16WAY