Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-07-12 21:19:14 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

wd_fdc.cpp: a bit improve HLD/HLT handling, fix FD1771 timings and enable spinup_on_interrupt

Browse Source
This commit is contained in:
MetalliC 2020-05-31 10:22:33 +03:00
parent 4d60d6c771
commit 8a0dff1cf1
1 changed files with 27 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
src/devices/machine/wd_fdc.cpp
View File

@ -23,7 +23,7 @@
#define LOG_LIVE (1U << 13) // Live states
#define LOG_FUNC (1U << 14) // Function calls
#define VERBOSE (LOG_GENERAL )
#define VERBOSE (LOG_GENERAL)
//#define LOG_OUTPUT_STREAM std::cout
#include "logmacro.h"
@ -93,6 +93,7 @@ wd_fdc_device_base::wd_fdc_device_base(const machine_config &mconfig, device_typ
force_ready = false;
disable_motor_control = false;
spinup_on_interrupt = false;
hlt = true; // assume tied to VCC
}
void wd_fdc_device_base::set_force_ready(bool _force_ready)
@ -284,23 +285,17 @@ void wd_fdc_device_base::command_end()
void wd_fdc_device_base::seek_start(int state)
{
LOGCOMMAND("cmd: seek %d %x (track=%d)\n", state, data, track);
LOGCOMMAND("cmd: seek %d %x (track=%u)\n", state, data, track);
main_state = state;
status &= ~(S_CRC|S_RNF|S_SPIN);
sub_state = motor_control ? SPINUP : SPINUP_DONE;
status_type_1 = true;
if(head_control) {
if(BIT(command, 3))
set_hld();
else
drop_hld();
// TODO get value from HLT callback
if(hld)
status |= S_HLD;
else
status &= ~S_HLD;
}
sub_state = motor_control ? SPINUP : SPINUP_DONE;
status_type_1 = true;
seek_continue();
}
@ -401,8 +396,8 @@ void wd_fdc_device_base::seek_continue()
case SEEK_WAIT_STABILIZATION_TIME_DONE:
LOGSTATE("SEEK_WAIT_STABILIZATION_TIME_DONE\n");
if(hld)
status |= S_HLD;
if (command & 0x04)
set_hld();
sub_state = SEEK_DONE;
break;
@ -1124,10 +1119,15 @@ void wd_fdc_device_base::cmd_w(uint8_t val)
if ((val & 0xf0) == 0xd0)
{
// checkme
// checkme timings
delay_cycles(t_cmd, dden ? delay_register_commit * 2 : delay_register_commit);
if (spinup_on_interrupt) // see note in WD1772 constructor
spinup();
if (spinup_on_interrupt) // see note in WD1772 constructor, might be true for other FDC types as well.
{
if (head_control)
set_hld();
if (motor_control)
spinup();
}
}
else
{
@ -1158,6 +1158,14 @@ uint8_t wd_fdc_device_base::status_r()
status &= ~S_DRQ;
}
if (status_type_1 && head_control)
{ // note: this status bit is AND of HLD latch and HLT input line
if (hld && hlt)
status |= S_HLD;
else
status &= ~S_HLD;
}
if(status_type_1) {
status &= ~(S_TR00|S_WP);
if(floppy) {
@ -1346,10 +1354,8 @@ void wd_fdc_device_base::index_callback(floppy_image_device *floppy, int state)
floppy->mon_w(1);
}
if(head_control && motor_timeout >= hld_timeout) {
if(head_control && motor_timeout >= hld_timeout)
drop_hld();
status &= ~S_HLD; // todo: should get this value from the drive
}
}
if(!intrq && (intrq_cond & I_IDX)) {
@ -2523,8 +2529,8 @@ fd1771_device::fd1771_device(const machine_config &mconfig, const char *tag, dev
constexpr static int fd1771_step_times[4] = { 12000, 12000, 20000, 40000 };
step_times = fd1771_step_times;
delay_register_commit = 16;
delay_command_commit = 20; // x2 due to fm
delay_register_commit = 16/2; // will became x2 later due to FM
delay_command_commit = 20/2; // same as above
disable_mfm = true;
inverted_bus = true;
side_control = false;
@ -2533,6 +2539,7 @@ fd1771_device::fd1771_device(const machine_config &mconfig, const char *tag, dev
hld_timeout = 3;
motor_control = false;
ready_hooked = true;
spinup_on_interrupt = true; // ZX-Spectrum Beta-disk V2 require this, or ReadSector command should set HLD before RDY check
}
int fd1771_device::calc_sector_size(uint8_t size, uint8_t command) const