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wd_fdc: Improve HLD behavior, always activating output at start of type II & III commands

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This commit is contained in:
AJR 2020-05-19 19:43:57 -04:00
parent f2fbec8abf
commit 8ac90b9f7b
2 changed files with 50 additions and 29 deletions
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74
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 | LOG_COMMAND | LOG_MATCH)
//#define LOG_OUTPUT_STREAM std::cout
#include "logmacro.h"
@ -147,6 +147,8 @@ void wd_fdc_device_base::device_start()
save_item(NAME(mr));
save_item(NAME(intrq));
save_item(NAME(drq));
if (head_control)
save_item(NAME(hld));
}
void wd_fdc_device_base::device_reset()
@ -185,15 +187,15 @@ WRITE_LINE_MEMBER(wd_fdc_device_base::mr_w)
intrq = false;
if (!intrq_cb.isnull())
{
intrq_cb(intrq);
}
drq = false;
if (!drq_cb.isnull())
{
drq_cb(drq);
if(head_control) {
hld = false;
if(!hld_cb.isnull())
hld_cb(hld);
}
hld = false;
mon_cb(1); // Clear the MON* line
@ -299,8 +301,13 @@ void wd_fdc_device_base::seek_start(int state)
main_state = state;
status &= ~(S_CRC|S_RNF|S_SPIN);
if(head_control) {
if(BIT(command, 3))
set_hld();
else
drop_hld();
// TODO get value from HLT callback
if(command & 8)
if(hld)
status |= S_HLD;
else
status &= ~S_HLD;
@ -388,6 +395,7 @@ void wd_fdc_device_base::seek_continue()
track = 0;
if(command & 0x04) {
set_hld();
sub_state = SEEK_WAIT_STABILIZATION_TIME;
delay_cycles(t_gen, 30000);
return;
@ -406,15 +414,13 @@ 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;
sub_state = SEEK_DONE;
break;
case SEEK_DONE:
LOGSTATE("SEEK_DONE\n");
status |= S_HLD;
hld = true;
if (!hld_cb.isnull())
hld_cb(hld);
if(command & 0x04) {
if(!is_ready()) {
status |= S_RNF;
@ -488,8 +494,8 @@ void wd_fdc_device_base::read_sector_start()
main_state = READ_SECTOR;
status &= ~(S_CRC|S_LOST|S_RNF|S_WP|S_DDM);
drop_drq();
if(side_control)
update_sso();
update_sso();
set_hld();
sub_state = motor_control ? SPINUP : SPINUP_DONE;
status_type_1 = false;
read_sector_continue();
@ -589,8 +595,8 @@ void wd_fdc_device_base::read_track_start()
main_state = READ_TRACK;
status &= ~(S_LOST|S_RNF);
drop_drq();
if(side_control)
update_sso();
update_sso();
set_hld();
sub_state = motor_control ? SPINUP : SPINUP_DONE;
status_type_1 = false;
read_track_continue();
@ -668,8 +674,8 @@ void wd_fdc_device_base::read_id_start()
main_state = READ_ID;
status &= ~(S_WP|S_DDM|S_LOST|S_RNF);
drop_drq();
if(side_control)
update_sso();
update_sso();
set_hld();
sub_state = motor_control ? SPINUP : SPINUP_DONE;
status_type_1 = false;
read_id_continue();
@ -745,8 +751,8 @@ void wd_fdc_device_base::write_track_start()
main_state = WRITE_TRACK;
status &= ~(S_WP|S_DDM|S_LOST|S_RNF);
drop_drq();
if(side_control)
update_sso();
update_sso();
set_hld();
sub_state = motor_control ? SPINUP : SPINUP_DONE;
status_type_1 = false;
@ -856,8 +862,8 @@ void wd_fdc_device_base::write_sector_start()
main_state = WRITE_SECTOR;
status &= ~(S_CRC|S_LOST|S_RNF|S_WP|S_DDM);
drop_drq();
if(side_control)
update_sso();
update_sso();
set_hld();
sub_state = motor_control ? SPINUP : SPINUP_DONE;
status_type_1 = false;
write_sector_continue();
@ -1353,14 +1359,8 @@ void wd_fdc_device_base::index_callback(floppy_image_device *floppy, int state)
floppy->mon_w(1);
}
if (head_control && motor_timeout >= hld_timeout)
{
hld = false;
// signal drive to unload head
if (!hld_cb.isnull())
hld_cb(hld);
if(head_control && motor_timeout >= hld_timeout) {
drop_hld();
status &= ~S_HLD; // todo: should get this value from the drive
}
}
@ -2217,6 +2217,24 @@ void wd_fdc_device_base::drop_drq()
}
}
void wd_fdc_device_base::set_hld()
{
if(head_control && !hld) {
hld = true;
if(!hld_cb.isnull())
hld_cb(hld);
}
}
void wd_fdc_device_base::drop_hld()
{
if(head_control && hld) {
hld = false;
if(!hld_cb.isnull())
hld_cb(hld);
}
}
void wd_fdc_device_base::update_sso()
{
// The 'side_control' flag is interpreted as meaning that the FDC has

5
src/devices/machine/wd_fdc.h
View File

@ -358,8 +358,11 @@ private:
void live_write_mfm(uint8_t mfm);
void live_write_fm(uint8_t fm);
void drop_drq();
void set_drq();
void drop_drq();
void set_hld();
void drop_hld();
void update_sso();
};