Search found 43 matches

by btl
Tue Dec 10, 2019 11:12 am
Forum: MONGREL H4 USER BUILDS
Topic: will it compute? btl's attempt to build the H4
Replies: 72
Views: 29653

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

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
by btl
Tue Dec 10, 2019 10:17 am
Forum: MONGREL H4 USER BUILDS
Topic: will it compute? btl's attempt to build the H4
Replies: 72
Views: 29653

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

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...
by btl
Sun Dec 08, 2019 6:59 pm
Forum: MONGREL H4 USER BUILDS
Topic: will it compute? btl's attempt to build the H4
Replies: 72
Views: 29653

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

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 :?
by btl
Sun Dec 08, 2019 5:18 pm
Forum: MONGREL H4 USER BUILDS
Topic: will it compute? btl's attempt to build the H4
Replies: 72
Views: 29653

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

derkom wrote: Sun Dec 08, 2019 4:58 pm 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.
by btl
Sun Dec 08, 2019 4:55 pm
Forum: MONGREL H4 USER BUILDS
Topic: will it compute? btl's attempt to build the H4
Replies: 72
Views: 29653

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

Oh my! i just programmed my EPROM, non-byteswapped TOS1.04 and byteswapped EmuTOS. It didn't change anything, so i started the Troubleshoot according to the H4 Troubleshoot thread. When i pressed and held reset in order to check the Reset Line, the little green EmuTOS desktop came on the screen! 201...
by btl
Sat Dec 07, 2019 6:50 pm
Forum: MONGREL H4 USER BUILDS
Topic: will it compute? btl's attempt to build the H4
Replies: 72
Views: 29653

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

Thanks! I got me TOS1.04 and EmuTOS 192k. I better erase my STE Eprom and try
if byteswap is needed or not before putting into an OTP PROM.
by btl
Sat Dec 07, 2019 6:28 pm
Forum: MONGREL H4 USER BUILDS
Topic: will it compute? btl's attempt to build the H4
Replies: 72
Views: 29653

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

Ah, i see.

I got an 27c4096 OTP prom, is there a file i can can program directly? I only have one try...
by btl
Sat Dec 07, 2019 5:58 pm
Forum: MONGREL H4 USER BUILDS
Topic: will it compute? btl's attempt to build the H4
Replies: 72
Views: 29653

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

OK, i connected my trusty C=1084s, connected my Lab PSU (current limiting to 1.5A) and fired it up: - no magic smoke - solid white screen output - no little green desktop - no reaction to reset button ah! forgot the Falcon RAM board ... but the same solid white screen. My TOS ROM is the one from the...
by btl
Sat Dec 07, 2019 2:52 pm
Forum: MONGREL H4 USER BUILDS
Topic: will it compute? btl's attempt to build the H4
Replies: 72
Views: 29653

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

Thank you Paul, in the meantime, last resistors are in. R3 and R4 were tricky, they go through the plastic frame of the MIDI ports... Lets do the capacitors now and then finish off with the 68k sockets Edit 17:00: Capacitors and Sockets are done. Lets go through the hotfixes. Edit 17:40: getting clo...
by btl
Sat Dec 07, 2019 1:23 pm
Forum: MONGREL H4 USER BUILDS
Topic: will it compute? btl's attempt to build the H4
Replies: 72
Views: 29653

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

This is how my SMD stuff looks like. Not perfect but clean enough.
20191207_140918.jpg
20191207_140918.jpg (117.23 KiB) Viewed 3335 times

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