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(MESS) c64: Floppy WIP. (nw)

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This commit is contained in:
Curt Coder 2014-02-10 22:40:47 +00:00
parent 755a60ac24
commit 0c721cc02c
2 changed files with 10 additions and 5 deletions
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13
src/emu/machine/64h156.c
View File

@ -324,12 +324,17 @@ void c64h156_device::live_run(attotime limit)
int load = !(((cur_live.bit_counter & 7) == 7) && ((cur_live.cell_counter & 3) == 3));
if (!load) {
cur_live.shift_reg_write = cur_live.yb;
// TODO use data read from disk if via PA is in read mode
//if (LOG) logerror("%s load write shift register %02x\n",cur_live.tm.as_string(),cur_live.shift_reg_write);
} else {
if (cur_live.oe) {
cur_live.shift_reg_write = cur_live.shift_reg;
if (LOG) logerror("%s load write shift register from read shift register %02x\n",cur_live.tm.as_string(),cur_live.shift_reg_write);
} else {
cur_live.shift_reg_write = cur_live.yb;
if (LOG) logerror("%s load write shift register from YB %02x\n",cur_live.tm.as_string(),cur_live.shift_reg_write);
}
} else if (!BIT(cell_counter, 1) && BIT(cur_live.cell_counter, 1)) {
cur_live.shift_reg_write <<= 1;
cur_live.shift_reg_write &= 0xff;
if (LOG) logerror("%s shift write register << %02x\n", cur_live.tm.as_string(), cur_live.shift_reg_write);
}
// update signals

2
src/emu/machine/64h156.h
View File

@ -155,7 +155,7 @@ private:
int cycles_until_random_flux;
UINT8 yb;
UINT16 shift_reg_write;
UINT8 shift_reg_write;
attotime write_start_time;
attotime write_buffer[32];
int write_position;