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Turns out that this machine once belonged to the band Apollo440 or @440 if anyone wants to know. Probably the first few of their albums was made using this very machine. Cool huh?
Is it? I've never came across any processor(I've only worked with microcontrollers) that can drive the reset line, its always a high impedance input only. What else is driving the reset line in the ST apart from this chip? And why?
I just had a 7414 in my random parts bin so used that instead. I don't really get why they used an open collector inverter, the one I used is actively driving the reset line high or low and it works just fine of course. Maybe the 7405 was cheaper back than?
Thank you for the answers! Black screen on a b&w high res atari monitor, no beeps on keypress. 5V ok, pin15: well, its 8mhz spot on but more like a triangle wave instead of square, and not a full 5V swing. Halt/reset both low-ish, i can see some very little change when pressing the reset button but ...
Hi all, newbie here so much so that I've never actually used any ataris, never had one but I just recently found an 520 STfm it was left behind on the new place we have moved in. I'm an electronic enthusiast so I was quite happy to see one of these pieces of computer history and of course wanted to ...