Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-07-05 18:08:04 +03:00
Code Issues Actions 7 Packages Projects Releases Wiki Activity

adc0804: Further note (nw)

Browse Source
This commit is contained in:
AJR 2019-10-18 12:48:02 -04:00
parent 697dfa9fac
commit ee76056937
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
src/devices/machine/adc0804.cpp
View File

@ -26,6 +26,13 @@
multiple other devices are also clocked through pin 19, which
yields the output of the internal Schmitt trigger clock circuit.
The ADC0804's INTR semaphore output reflects not the actual busy
state of the converter (as EOC does on the ADC0808) but an
internal flip-flop attached to it. This flip-flop is reset by
pulling either RD or WR active low; therefore, INTR will never
toggle if RD is tied to GND to keep the data outputs continuously
active.
**********************************************************************/
#include "emu.h"