Smonson's slow H4 build

Topic for users to share their building progress.
User avatar
kodak80
Posts: 254
Joined: Sat Oct 21, 2017 1:14 am
Location: Brisbane,QLD Australia
Contact:

Re: Smonson's slow H4 build

Post by kodak80 » Tue Jan 14, 2020 7:54 am

@Smonson I have purchase from this seller a few times and components have worked fine.

They also sell them in 5 packs: https://www.ebay.com.au/itm/5pcs-HN27C4 ... 2103004850
Atari Falcon 030 | Atari 1040 STE | Atari 1040 STFM | Atari 1040 STF | Kryoflux & Supercard Pro Flux boards
Creator of the Atari ST Review magazine archive: https://www.chillichai.com/atari-st-review

User avatar
exxos
Site Admin
Site Admin
Posts: 11272
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
YouTube: https://www.youtube.com/user/exxosuk
Contact:

Re: Smonson's slow H4 build

Post by exxos » Tue Jan 14, 2020 9:48 am

Smonson wrote:
Tue Jan 14, 2020 6:47 am
I never cease to be amazed that you can buy 32GB of flash for $10 and yet a chip with less than a meg on it can be the same price or more.
Try buying 100 of them each time like I have to :lol: :roll:
https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.

User avatar
Smonson
Trusted Guru
Trusted Guru
Posts: 539
Joined: Sat Oct 28, 2017 10:21 am
Location: Canberra, Australia
Contact:

Re: Smonson's slow H4 build

Post by Smonson » Tue Jan 14, 2020 10:09 am

exxos wrote:
Tue Jan 14, 2020 9:48 am
Try buying 100 of them each time like I have to :lol: :roll:
Ummm, I might pass... :lol:

User avatar
PaulJ
Trusted Guru
Trusted Guru
Posts: 1319
Joined: Sun Apr 08, 2018 1:14 am
Location: USA

Re: Smonson's slow H4 build

Post by PaulJ » Tue Jan 14, 2020 3:10 pm

Smonson wrote:
Tue Jan 14, 2020 4:17 am
Thanks @PaulJ. Gosh they're not cheap for a OTP, are they :shock:
Ya you're right but I have good reason for buying quality OTP. Initially with the Remake board I purchased 4 of the EEPROM Kodak80 listed. I did this because I was putting together the images for the OTP chips and I didn't want to be able erase and reprogram. The first failed in about 10 minutes.. stone cold dead, the remained 3 appeared to be running fine. When I built my 1.04/DiagROM I could not get the DiagROM half to run no matter what I did. Tried a second EEPROM.. same shit. Put them in the eprom programmer and would tell me I had the programmed image. Finally out of despiration I tried the third and last EEPROM. It worked!!!! SAME IMAGE! I had wasted days playing with eBay cut rate crap. So from that point on I made sure to get quality prom devices. I still use the EEPROMS but if they don't work I don't take that as a bad image. At that time @Phil was having the same issue. So if it fails to work don't assume you have a bad image.

So I wasted about 20 hours of effort and a lot of head scratching.. its worth a few bucks to me to avoid massive loss of time and dealing with a issue that makes no sense.

User avatar
kodak80
Posts: 254
Joined: Sat Oct 21, 2017 1:14 am
Location: Brisbane,QLD Australia
Contact:

Re: Smonson's slow H4 build

Post by kodak80 » Wed Jan 15, 2020 2:44 am

I had issues programming the OTP chips and I binned 6 chips through programming fails. I switched to the UV erasable ones and also had programming issues which turned out to be a worn ZIF socket on my programmer.

I have found on my new programmer that the UV chips need to be held in the adapter to ensure all pins are connected and programming works 9 times out of 10 but even if it fails I can erase them and try again. I have not yet had one that I could not program.
Atari Falcon 030 | Atari 1040 STE | Atari 1040 STFM | Atari 1040 STF | Kryoflux & Supercard Pro Flux boards
Creator of the Atari ST Review magazine archive: https://www.chillichai.com/atari-st-review

User avatar
PaulJ
Trusted Guru
Trusted Guru
Posts: 1319
Joined: Sun Apr 08, 2018 1:14 am
Location: USA

Re: Smonson's slow H4 build

Post by PaulJ » Wed Jan 15, 2020 3:18 am

kodak80 wrote:
Wed Jan 15, 2020 2:44 am
I had issues programming the OTP chips and I binned 6 chips through programming fails. I switched to the UV erasable ones and also had programming issues which turned out to be a worn ZIF socket on my programmer.

I have found on my new programmer that the UV chips need to be held in the adapter to ensure all pins are connected and programming works 9 times out of 10 but even if it fails I can erase them and try again. I have not yet had one that I could not program.
Ya, when making a new image I use the erasable and after it works burn a OTP. I've trashed a few of the OTP's when I think I couldn't screw it up.. but do.

User avatar
Smonson
Trusted Guru
Trusted Guru
Posts: 539
Joined: Sat Oct 28, 2017 10:21 am
Location: Canberra, Australia
Contact:

Re: Smonson's slow H4 build

Post by Smonson » Tue Feb 25, 2020 7:53 am

Got most of the passives on now, and I've got a SIMM socket coming. I started depopulating my donor board. The first thing I ran into was the reversed reset switch footprint. I don't really want to bend the switch to make it fit - I might just drill a couple of extra holes for the shield. Has anyone else done this successfully?

User avatar
exxos
Site Admin
Site Admin
Posts: 11272
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
YouTube: https://www.youtube.com/user/exxosuk
Contact:

Re: Smonson's slow H4 build

Post by exxos » Tue Feb 25, 2020 8:34 am

Don't drill holes, you risk shorting out the internal power planes.
https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.

User avatar
Smonson
Trusted Guru
Trusted Guru
Posts: 539
Joined: Sat Oct 28, 2017 10:21 am
Location: Canberra, Australia
Contact:

Re: Smonson's slow H4 build

Post by Smonson » Tue Feb 25, 2020 8:39 am

Hmm, okay, I won't be doing that then!

User avatar
exxos
Site Admin
Site Admin
Posts: 11272
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
YouTube: https://www.youtube.com/user/exxosuk
Contact:

Re: Smonson's slow H4 build

Post by exxos » Tue Feb 25, 2020 9:01 am

Derkom said it just went on a bit wonky viewtopic.php?f=78&t=2171&start=40#p29128
https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.

Post Reply

Return to “MONGREL H4 USER BUILDS”