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apple2gs: control panel (Ctrl-Cmd-Esc) and flush (Ctrl-Cmd-Delete) support

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generate adb interrupt when the data register is full
This commit is contained in:
ksherlock 2021-03-13 20:33:14 -05:00 committed by GitHub
parent 3b70d3a8be
commit c38b02f72a
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 44 additions and 5 deletions
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49
src/mame/drivers/apple2gs.cpp
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@ -581,6 +581,7 @@ private:
u8 m_adb_command;
u8 m_adb_mode;
u8 m_adb_kmstatus;
u8 m_adb_pending_status;
u8 m_adb_latent_result;
s32 m_adb_command_length;
s32 m_adb_command_pos;
@ -856,12 +857,14 @@ WRITE_LINE_MEMBER(apple2gs_state::ay3600_data_ready_w)
}
m_lastchar = m_ay3600->b_r();
u8 special = m_kbspecial->read();
trans = m_lastchar & ~(0x1c0); // clear the 3600's control/shift stuff
trans |= (m_lastchar & 0x100)>>2; // bring the 0x100 bit down to the 0x40 place
trans <<= 2; // 4 entries per key
trans |= (m_kbspecial->read() & 0x06) ? 0x00 : 0x01; // shift is bit 1 (active low)
trans |= (m_kbspecial->read() & 0x08) ? 0x00 : 0x02; // control is bit 2 (active low)
trans |= (m_kbspecial->read() & 0x01) ? 0x0000 : 0x0200; // caps lock is bit 9 (active low)
trans |= (special & 0x06) ? 0x00 : 0x01; // shift is bit 1 (active low)
trans |= (special & 0x08) ? 0x00 : 0x02; // control is bit 2 (active low)
trans |= (special & 0x01) ? 0x0000 : 0x0200; // caps lock is bit 9 (active low)
// hack in keypad equals because we can't find it in the IIe keymap (Sather doesn't show it in the matrix, but it's clearly on real platinum IIes)
if (m_lastchar == 0x146)
@ -875,6 +878,24 @@ WRITE_LINE_MEMBER(apple2gs_state::ay3600_data_ready_w)
m_strobe = 0x80;
// printf("new char = %04x (%02x)\n", m_lastchar, m_transchar);
/* check for command-control-esc and command-control delete */
if ((special & 0x18) == 0x18)
{
if (m_transchar == 0x1b)
{
m_adb_pending_status |= 0x20;
}
else if (m_transchar == 0x7f)
{
m_adb_pending_status |= 0x10;
}
if (m_adb_pending_status && m_adb_state == ADBSTATE_IDLE)
{
adb_post_response_1(m_adb_pending_status);
m_adb_pending_status = 0;
}
}
}
}
@ -936,6 +957,9 @@ void apple2gs_state::adb_post_response(const u8 *bytes, size_t length)
m_adb_state = ADBSTATE_INRESPONSE;
m_adb_response_length = length;
m_adb_response_pos = 0;
m_adb_kmstatus |= 0x20;
if (m_adb_kmstatus & 0x10)
raise_irq(IRQS_ADB);
}
void apple2gs_state::adb_post_response_1(u8 b)
@ -1078,7 +1102,6 @@ void apple2gs_state::adb_do_command()
default:
fatalerror("ADB command 0x%02x unimplemented\n", m_adb_command);
}
m_adb_kmstatus |= 0x20;
}
u8 apple2gs_state::adb_read_datareg()
@ -1093,7 +1116,10 @@ u8 apple2gs_state::adb_read_datareg()
{
m_adb_state = ADBSTATE_IDLE;
m_adb_latent_result = result;
m_adb_kmstatus &= ~0x20;
if (((m_adb_kmstatus & (m_adb_kmstatus >> 1)) & 0x54) == 0)
lower_irq(IRQS_ADB);
}
break;
@ -1265,6 +1291,11 @@ void apple2gs_state::adb_write_kmstatus(u8 data)
{
m_adb_kmstatus &= ~0x54;
m_adb_kmstatus |= data & 0x54;
if (((m_adb_kmstatus & (m_adb_kmstatus >> 1)) & 0x54))
raise_irq(IRQS_ADB);
else
lower_irq(IRQS_ADB);
}
@ -1282,7 +1313,8 @@ u8 apple2gs_state::adb_read_mousedata()
absolute = m_mouse_y;
delta = m_mouse_dy;
m_adb_kmstatus &= ~0x82;
lower_irq(IRQS_ADB);
if (((m_adb_kmstatus & (m_adb_kmstatus >> 1)) & 0x54) == 0)
lower_irq(IRQS_ADB);
}
else
{
@ -1483,6 +1515,7 @@ void apple2gs_state::machine_start()
save_item(m_adb_command, "ADB/m_adb_command");
save_item(m_adb_mode, "ADB/m_adb_mode");
save_item(m_adb_kmstatus, "ADB/m_adb_kmstatus");
save_item(m_adb_pending_status, "ADB/m_adb_pending_status");
save_item(m_adb_latent_result, "ADB/m_adb_latent_result");
save_item(m_adb_command_length, "ADB/m_adb_command_length");
save_item(m_adb_command_pos, "ADB/m_adb_command_pos");
@ -1751,6 +1784,12 @@ TIMER_DEVICE_CALLBACK_MEMBER(apple2gs_state::apple2_interrupt)
{
#if !RUN_ADB_MICRO
adb_check_mouse();
if (m_adb_state == ADBSTATE_IDLE && m_adb_pending_status)
{
adb_post_response_1(m_adb_pending_status);
m_adb_pending_status = 0;
}
#endif
}