litterbox99
Experienced Member
- Joined
- Aug 8, 2010
- Messages
- 103
Hey all...
I have the board build and I'm in the
early testing phase... I have a question
about this phrase;
Next add U49 (a 74LS125) ...... Temporally tie U9 pin 9 to ground.
The input should change to FFh.
There is no U9, if you meant U49, that would be the buzzer circuit.
Without grounding U9, a DB at 15h gives me FFh
???
Next add U49 (a 74LS125). Install jumpers P77 1-3 & 2-4. Temporally tie U9 pin 9 to ground. The input sho
Next add U49 (a 74LS125). Install jumpers P77 1-3 & 2-4. Temporally tie U9 pin 9 to ground. The input should change to FFH. Insert a (RED) LED, D16, test and solder. Remove the U9 jumper
uld change to FFH. Insert a (RED) LED, D16, test and solder. Remove the U9 jumper
nstall jumpers P77 1-3 & 2-4. Temporally tie U9 pin 9 to ground. The input should change to FFH. Insert a (RED) LED, D16, test and solder. Remove the U9 jumperdd U49 (a 74LS125). Install jumpers P77 1-3 & 2-4. Temporally tie U9 pin 9 to ground. The input Next add U49 (a 74LS125). Install jumpers P77 1-3 & 2-4. Temporally tie U9 pin 9 to ground. The input Next add U49 (a 74LS125). Install jumpers P77 1-3 & 2-4. Temporally tie U9 pin 9 to ground. The input should change to FFH. Insert a (RED) LED, D16, test and solder. Remove the U9 jumper.
should change to FFH. Insert a (RED) LED, D16, test and solder. Remove the U9 jumper.
should change to FFH. Insert a (RED) LED, D16, test and solder. Remove the U9 jumper.
I have the board build and I'm in the
early testing phase... I have a question
about this phrase;
Next add U49 (a 74LS125) ...... Temporally tie U9 pin 9 to ground.
The input should change to FFh.
There is no U9, if you meant U49, that would be the buzzer circuit.
Without grounding U9, a DB at 15h gives me FFh
???
Next add U49 (a 74LS125). Install jumpers P77 1-3 & 2-4. Temporally tie U9 pin 9 to ground. The input sho
Next add U49 (a 74LS125). Install jumpers P77 1-3 & 2-4. Temporally tie U9 pin 9 to ground. The input should change to FFH. Insert a (RED) LED, D16, test and solder. Remove the U9 jumper
uld change to FFH. Insert a (RED) LED, D16, test and solder. Remove the U9 jumper
nstall jumpers P77 1-3 & 2-4. Temporally tie U9 pin 9 to ground. The input should change to FFH. Insert a (RED) LED, D16, test and solder. Remove the U9 jumperdd U49 (a 74LS125). Install jumpers P77 1-3 & 2-4. Temporally tie U9 pin 9 to ground. The input Next add U49 (a 74LS125). Install jumpers P77 1-3 & 2-4. Temporally tie U9 pin 9 to ground. The input Next add U49 (a 74LS125). Install jumpers P77 1-3 & 2-4. Temporally tie U9 pin 9 to ground. The input should change to FFH. Insert a (RED) LED, D16, test and solder. Remove the U9 jumper.
should change to FFH. Insert a (RED) LED, D16, test and solder. Remove the U9 jumper.
should change to FFH. Insert a (RED) LED, D16, test and solder. Remove the U9 jumper.