Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-23 00:39:36 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

qx10: Implement floppy motor on timer (#9456)

Browse Source
This commit is contained in:
Brian Johnson 2022-03-23 14:15:37 -04:00 committed by GitHub
parent 18bdf245a2
commit d31fe10f92
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 36 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
src/mame/drivers/qx10.cpp
View File

@ -116,10 +116,12 @@ private:
void prom_sel_w(uint8_t data);
void cmos_sel_w(uint8_t data);
DECLARE_WRITE_LINE_MEMBER( qx10_upd765_interrupt );
void update_fdd_motor(uint8_t state);
void fdd_motor_w(uint8_t data);
uint8_t qx10_30_r();
void zoom_w(uint8_t data);
DECLARE_WRITE_LINE_MEMBER( tc_w );
void sqw_out(uint8_t state);
uint8_t mc146818_r(offs_t offset);
void mc146818_w(offs_t offset, uint8_t data);
IRQ_CALLBACK_MEMBER( inta_call );
@ -185,7 +187,8 @@ private:
/* FDD */
int m_fdcint;
int m_fdcmotor;
uint8_t m_motor_clk;
uint16_t m_counter;
//int m_fdcready;
int m_spkr_enable;
@ -477,12 +480,22 @@ WRITE_LINE_MEMBER( qx10_state::qx10_upd765_interrupt )
m_pic_m->ir6_w(state);
}
void qx10_state::update_fdd_motor(uint8_t state)
{
for (auto& fdd : m_floppy)
{
floppy_image_device *floppy = fdd->get_device();
if (floppy)
{
floppy->mon_w(state);
}
}
}
void qx10_state::fdd_motor_w(uint8_t data)
{
m_fdcmotor = 1;
m_floppy[0]->get_device()->mon_w(false);
m_floppy[1]->get_device()->mon_w(false);
m_counter = 0;
update_fdd_motor(0);
// motor off controlled by clock
}
@ -494,7 +507,7 @@ uint8_t qx10_state::qx10_30_r()
floppy2 = m_floppy[1]->get_device();
return m_fdcint |
/*m_fdcmotor*/ 0 << 1 |
BIT(m_counter, 11) << 1 |
((floppy1 != nullptr) || (floppy2 != nullptr) ? 1 : 0) << 3 |
m_membank << 4;
}
@ -590,6 +603,22 @@ void qx10_state::memory_write_byte(offs_t offset, uint8_t data)
/*
MC146818
*/
void qx10_state::sqw_out(uint8_t state)
{
uint8_t clk = !(state || BIT(m_counter, 11));
uint16_t cnt = m_counter;
if (!clk && m_motor_clk)
{
cnt = (cnt + 1) & 0xfff;
}
if (BIT(cnt, 11) && !BIT(m_counter, 11)) {
update_fdd_motor(1);
}
m_motor_clk = clk;
m_counter = cnt;
}
void qx10_state::mc146818_w(offs_t offset, uint8_t data)
{
@ -965,6 +994,7 @@ void qx10_state::qx10(machine_config &config)
MC146818(config, m_rtc, 32.768_kHz_XTAL);
m_rtc->irq().set(m_pic_s, FUNC(pic8259_device::ir2_w));
m_rtc->sqw().set(FUNC(qx10_state::sqw_out));
UPD765A(config, m_fdc, 8'000'000, true, true);
m_fdc->intrq_wr_callback().set(FUNC(qx10_state::qx10_upd765_interrupt));