Hi all !
Im new to the forum, and new to the NES comunity. In fact, I came from the enemy of Mario . (SEGA MASTERRACE ). Unfortualy my girlfriend hate Sonic and loves play to Mario 1 & 3.
In order to work properly for Mario 3 (US version on EU Nes), I managed to kill the CIC chip. Beacose of realy bad dessolder tools, I finaly totaly removed the 10NES and try to figure out why the NES couldn't start properly without this chip.
I finaly resolder with some wire the 10Nes with the LOCK/KEY pin 4 to ground and the NES work perfectly now.
BUT it make me fell bad to know that a chip is badly soldered on the NES and want to understand how to remove it entierely.
As I understood from my (badly screwed) modification I have some questions:
- The RESET button of the NES is ONLY linked to the 10 Nes RESET pin 7. It is LOW or HIGHT logic ? (Reset occure when LOW or when HIGHT ?) It is pulled hight/down ?
- The NES must have a Power On Reset. Where is it ? On the RESET button line a simply a Capacitor + Resistor + Shmitd Trigger ? Is it the 10NES managing this feature ?
- Simply : How we can simply remove the CIC chip ?
If the POR is managed in the aera of the RESET button, I should just link the RESET pin 7 to the /Host reset pin 9 whith inverter (If I correctly understood, RESET pin 7 is Active HIGHT, but /Host reset pin 9 is active LOW).
If the POR was managed by the CIC chip, I need to add a custom POR OR'ed whith the inverter put between pin 7 and pin 9.
This is correct ?
BTW : Realy sorry for my bad english.
Im new to the forum, and new to the NES comunity. In fact, I came from the enemy of Mario . (SEGA MASTERRACE ). Unfortualy my girlfriend hate Sonic and loves play to Mario 1 & 3.
In order to work properly for Mario 3 (US version on EU Nes), I managed to kill the CIC chip. Beacose of realy bad dessolder tools, I finaly totaly removed the 10NES and try to figure out why the NES couldn't start properly without this chip.
I finaly resolder with some wire the 10Nes with the LOCK/KEY pin 4 to ground and the NES work perfectly now.
BUT it make me fell bad to know that a chip is badly soldered on the NES and want to understand how to remove it entierely.
As I understood from my (badly screwed) modification I have some questions:
- The RESET button of the NES is ONLY linked to the 10 Nes RESET pin 7. It is LOW or HIGHT logic ? (Reset occure when LOW or when HIGHT ?) It is pulled hight/down ?
- The NES must have a Power On Reset. Where is it ? On the RESET button line a simply a Capacitor + Resistor + Shmitd Trigger ? Is it the 10NES managing this feature ?
- Simply : How we can simply remove the CIC chip ?
If the POR is managed in the aera of the RESET button, I should just link the RESET pin 7 to the /Host reset pin 9 whith inverter (If I correctly understood, RESET pin 7 is Active HIGHT, but /Host reset pin 9 is active LOW).
If the POR was managed by the CIC chip, I need to add a custom POR OR'ed whith the inverter put between pin 7 and pin 9.
This is correct ?
BTW : Realy sorry for my bad english.