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(MESS) victor9k: Floppy WIP. (nw)

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This commit is contained in:
Curt Coder 2014-11-03 22:52:52 +02:00
parent e3680d1c8f
commit af8b0eedcd
3 changed files with 34 additions and 4 deletions
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2
src/lib/formats/victor9k_dsk.c
View File

@ -87,7 +87,7 @@ const victor9k_format::format victor9k_format::formats[] = {
const UINT32 victor9k_format::cell_size[] =
{
0
1789, 1896, 2009, 2130, 2272, 2428, 2613, 2847, 2961
};
const int victor9k_format::sectors_per_track[2][80] =

32
src/mess/machine/victor9k_fdc.c
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@ -887,6 +887,8 @@ void victor_9000_fdc_t::live_start()
cur_live.shift_reg = 0;
cur_live.shift_reg_write = 0;
cur_live.bit_counter = 0;
cur_live.sync_bit_counter = 0;
cur_live.sync_byte_counter = 0;
cur_live.drive = m_drive;
cur_live.side = m_side;
@ -1007,6 +1009,7 @@ void victor_9000_fdc_t::live_abort()
cur_live.brdy = 1;
cur_live.lbrdy = 1;
cur_live.sync = 1;
cur_live.syn = 1;
cur_live.gcr_err = 1;
}
@ -1045,17 +1048,35 @@ void victor_9000_fdc_t::live_run(const attotime &limit)
}
}
// sync counter
if (sync) {
cur_live.sync_bit_counter = 0;
cur_live.sync_byte_counter = 10;
} else if (!cur_live.sync) {
cur_live.sync_bit_counter++;
if (cur_live.sync_bit_counter == 10) {
cur_live.sync_bit_counter = 0;
cur_live.sync_byte_counter++;
if (cur_live.sync_byte_counter == 16) {
cur_live.sync_byte_counter = 0;
}
}
}
// syn
int syn = !(cur_live.sync_byte_counter == 15);
// GCR decoder
if (cur_live.drw) {
cur_live.i = cur_live.drw << 10 | cur_live.shift_reg;
} else {
cur_live.i = 0x300 | ((cur_live.wd & 0xf0) << 1) | cur_live.wrsync << 4 | (cur_live.wd & 0x0f);
cur_live.i = cur_live.drw << 10 | ((cur_live.wd & 0xf0) << 1) | cur_live.wrsync << 4 | (cur_live.wd & 0x0f);
}
cur_live.e = m_gcr_rom->base()[cur_live.i];
// byte ready
int brdy = cur_live.bit_counter == 9;
int brdy = !(cur_live.bit_counter == 9);
// GCR error
int gcr_err = !(brdy || BIT(cur_live.e, 3));
@ -1073,6 +1094,12 @@ void victor_9000_fdc_t::live_run(const attotime &limit)
syncpoint = true;
}
if (syn != cur_live.syn) {
if (LOG) logerror("%s SYN %u\n", cur_live.tm.as_string(),syn);
cur_live.syn = syn;
syncpoint = true;
}
if (gcr_err != cur_live.gcr_err) {
if (LOG) logerror("%s GCR ERR %u\n", cur_live.tm.as_string(),gcr_err);
cur_live.gcr_err = gcr_err;
@ -1093,6 +1120,7 @@ void victor_9000_fdc_t::live_run(const attotime &limit)
case RUNNING_SYNCPOINT: {
m_lbrdy_cb(cur_live.lbrdy);
m_syn_cb(cur_live.syn);
cur_live.state = RUNNING;
checkpoint();

4
src/mess/machine/victor9k_fdc.h
View File

@ -125,9 +125,12 @@ private:
attotime edge;
UINT16 shift_reg;
int bit_counter;
int sync_bit_counter;
int sync_byte_counter;
int brdy;
int lbrdy;
int sync;
int syn;
int gcr_err;
// write
@ -137,7 +140,6 @@ private:
int write_position;
UINT8 wd;
int wrsync;
int syn;
int gcr_data;
int erase;
};