will it compute? btl's attempt to build the H4

btl · Post by **btl** » 08 Dec 2019 17:18

derkom wrote: 08 Dec 2019 16:58 Are you missing the jumper in the Flashy Clock socket area? That may be affecting your reset behaviour.

no, i was short of jumpers so there is a wire soldered.

Post by **exxos** » 08 Dec 2019 17:21

Did you use a original switch ? And exact part number for the reset switch and LS chip next to it ? Soldered reset ic in the right way ?

btl · Post by **btl** » 08 Dec 2019 18:59

Yes, i used the switch of my donor 520ST.

I can report keyboard and mouse working, too.

Will check my mouser order if i got the correct reset IC. It is soldered correct orientation, that much i could double check already

My next Atari time frame is on Tuesday :?

Post by **IngoQ** » 08 Dec 2019 21:10

You might want to check R13 and R919, they can very easily be confused...

https://www.exxosforum.co.uk/forum/viewt ... =20#p30023

btl · Post by **btl** » 10 Dec 2019 10:17

Thanks Ingo,

i checked but they were correct. then i checked my Reset IC, and indeed, no idea how, but i ordered the wrong part.
Same functionality, but "active high" logic, soinverted logic than expected. I'll try to find the correct one, but mouser
wants 20€ shipping for a 0.58€ part. If someone knows a seller in EU with reasonable shipping, let me know.

For now, i left out the chip and rely on the reset switch only. I know, thats not good and may produce trouble,
but its only temporary.

Post by **IngoQ** » 10 Dec 2019 10:51

I think I ordered a couple more than I needed, let me check tonight. I could then send you one, if you PM me your address. You are in Germany as well, right? And the part number was SN74LVC1G11DBVR ?

btl · Post by **btl** » 10 Dec 2019 11:12

Hi,

yeah, i'm in germany. The parts was U$6 RESET_IC SOT143-4 STM6315RGW13F

it would be awesome if you have spare for me!

greets,
btl

btl · Post by **btl** » 10 Dec 2019 13:09

OK, now that i've overcome my first oopsie, i connected a floppy disk drive.

Time to run a GB6!

20191210_135333.jpg

It does compute! :cheer:

Post by **PhilC** » 10 Dec 2019 13:43

Well done and interesting to see it's a little too bright on your 1084 as well.

Time to experiment with those 3 resistor values on the rgb circuit.

PaulJ · Post by **PaulJ** » 10 Dec 2019 14:45

btl wrote: 10 Dec 2019 13:09 OK, now that i've overcome my first oopsie, i connected a floppy disk drive.

Time to run a GB6!

Nice job btl. :thumbup: :thumbup: :thumbup:

exxos's Atari, Amiga & retro forum

will it compute? btl's attempt to build the H4

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