tag:blogger.com,1999:blog-8907294954824216214.post6784390779283579072..comments2022-12-10T05:55:04.566-08:00Comments on Q-emuLator blog: Dumping Intel 8049 ROMsPhotoSynthhttp://www.blogger.com/profile/02016069217009878973noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-8907294954824216214.post-79292078675151110892020-09-08T02:28:25.450-07:002020-09-08T02:28:25.450-07:00I am trying to use above circuit for Intel D8749 t...I am trying to use above circuit for Intel D8749 to dump HEX program with only one change i.e. pin 7 is pulled to +18V but result is not consistent. Every time when I reset Arduino it dumps different HEX. Can you please advise on the logic with various delays. I tried increasing/decreasing delay after SetAddress(255), but no luck yet. Is there anything I should try?Sanjayhttps://www.blogger.com/profile/04586489800641035995noreply@blogger.comtag:blogger.com,1999:blog-8907294954824216214.post-17352686880443649632020-05-28T10:48:15.680-07:002020-05-28T10:48:15.680-07:00I have not tried reading Hermes as I don't hav...I have not tried reading Hermes as I don't have one. The datasheet only shows a program+verify cycle for the 8749... perhaps it can be changed to verify-only by omitting the programming pulse, but not sure. Writing a 8749 would require a few more changes, including a second voltage (21V) for programming, perhaps higher power, and a transistor for the 18V programming pulse.PhotoSynthhttps://www.blogger.com/profile/02016069217009878973noreply@blogger.comtag:blogger.com,1999:blog-8907294954824216214.post-79852140588776226642020-05-27T02:17:29.321-07:002020-05-27T02:17:29.321-07:00Cool stuff. I guess using a similar setup you coul...Cool stuff. I guess using a similar setup you could also write a 8749 chip. Speaking of 8749, did you try reading the firmware of a Hermes chip?Marcel Kilgushttps://www.blogger.com/profile/06566669255393668542noreply@blogger.com