Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-24 09:20:02 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

upd765: Fixes fifo mess-up on unexpected fifo pushes on hx5102.

Browse Source
This commit is contained in:
Michael Zapf 2018-08-06 00:09:16 +02:00
parent 041ad3f77f
commit c694dddf02
1 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
src/devices/machine/upd765.cpp
View File

@ -584,6 +584,15 @@ void upd765_family_device::disable_transfer()
void upd765_family_device::fifo_push(uint8_t data, bool internal)
{
// MZ: A bit speculative. These lines help to avoid some FIFO mess-up
// with the HX5102 that happens when WRITE DATA fails to find the sector
// but the host already starts pushing the sector data. Should not hurt.
if (fifo_expected == 0)
{
LOGFIFO("Fifo not expecting data, discarding\n");
return;
}
if(fifo_pos == 16) {
if(internal) {
if(!(st1 & ST1_OR))