mirror of
https://github.com/holub/mame
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c046734f76
out of whatsnew: Did not add Unicode support for debugger from branch yet, for now few special chars are converted to be plain ASCII
66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
/*****************************************************************************
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*
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* Xerox AltoII memory mapped I/O keyboard
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*
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* Copyright Juergen Buchmueller <pullmoll@t-online.de>
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*
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* Licenses: MAME, GPLv2
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*
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*****************************************************************************/
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#include "alto2cpu.h"
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/**
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* @brief read the keyboard address matrix
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*
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* @param addr memory mapped I/O address to be read
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* @return keyboard matrix value for address modulo 4
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*/
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READ16_MEMBER( alto2_cpu_device::kbd_ad_r )
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{
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UINT16 data = 0177777;
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switch (offset & 3) {
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case 0:
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data = machine().root_device().ioport("ROW0")->read();
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break;
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case 1:
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data = machine().root_device().ioport("ROW1")->read();
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break;
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case 2:
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data = machine().root_device().ioport("ROW2")->read();
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break;
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case 3:
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data = machine().root_device().ioport("ROW3")->read();
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break;
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}
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m_kbd.matrix[offset & 03] = data;
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if (!space.debugger_access()) {
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LOG((LOG_KBD,2," read KBDAD+%o (%#o)\n", offset & 3, data));
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}
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if (0 == (offset & 3) && (m_kbd.bootkey != 0177777)) {
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if (!space.debugger_access()) {
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LOG((0,2," boot keys (%#o & %#o)\n", data, m_kbd.bootkey));
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}
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data &= m_kbd.bootkey;
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m_kbd.bootkey = 0177777;
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}
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return data;
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}
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void alto2_cpu_device::init_kbd(UINT16 bootkey)
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{
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m_kbd.bootkey = bootkey;
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}
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void alto2_cpu_device::exit_kbd()
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{
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// nothing to do yet
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}
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void alto2_cpu_device::reset_kbd()
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{
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m_kbd.matrix[0] = 0177777;
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m_kbd.matrix[1] = 0177777;
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m_kbd.matrix[2] = 0177777;
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m_kbd.matrix[3] = 0177777;
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}
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