ST RTC EXTERNAL BETA - WIP

Current solutions and designs.
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exxos
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Re: ST RTC EXTERNAL BETA - WIP

Post by exxos »

PhilC wrote: Fri Apr 12, 2019 5:59 pm Ahem :evil: :lol: don't remember you being on charge of blowing things up.
Sorry boss! :lol:
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Re: ST RTC EXTERNAL BETA - WIP

Post by exxos »

Finally figured it out :lol:

Time and date was set, machine was powered down, and the time and date was still there when powered backup 8-)

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Re: ST RTC EXTERNAL BETA - WIP

Post by rubber_jonnie »

If you look at my RTC guide and instructions there is a link to disk images with FGMC2 software on it.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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Re: ST RTC EXTERNAL BETA - WIP

Post by exxos »

rubber_jonnie wrote: Sat Apr 13, 2019 11:02 am If you look at my RTC guide and instructions there is a link to disk images with FGMC2 software on it.
I did look, but only saw the zip which is posted in the software section anyway.
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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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Re: ST RTC EXTERNAL BETA - WIP

Post by rubber_jonnie »

Hmm, I know I had an acc that put the time up on the menu bar, I thought it was on the disk. Will need to think about where I may have put it.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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Re: ST RTC EXTERNAL BETA - WIP

Post by exxos »

How many people are interested in a kit ? Price will be about 25.. I may take some pre-orders for it as I don't want to invest in £12 a pop for a item for a stock item.
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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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Re: ST RTC EXTERNAL BETA - WIP

Post by AndresPlazaR »

exxos wrote: Sat Apr 13, 2019 4:54 pm How many people are interested in a kit ? Price will be about 25.. I may take some pre-orders for it as I don't want to invest in £12 a pop for a item for a stock item.
Interested!
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exxos
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Re: ST RTC EXTERNAL BETA - WIP

Post by exxos »

Back to the plot...

I will build up maybe 5 of these this week and give them a test.. Then I will add them to my store.. I am not going to keep a large stock of these because of the price of the chips. I have not currently got many PCBs made anyway..
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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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Re: ST RTC EXTERNAL BETA - WIP

Post by exxos »

New chips from Farnell come... Still not having any luck...

The purple board was one of the older prototypes, that one was working until I changed the chip.. It hasn't worked since..

The middle one was the one I built up yesterday with the socket, I have not had this working at all yet..

The bottom one was the one I made up a few weeks ago which was working, until I change the chip, and it has not worked since.

Each of those boards as a new Farnell chip in it...So I do not know what the problem is :(


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https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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Re: ST RTC EXTERNAL BETA - WIP

Post by PhilC »

Can you build the circuit on a breadboard to rule out any inconsistencies with PCBs?

And I know it's obvious but have you tried a different ST, in case its the ST that's killing the chips? Just a thought.
If it ain't broke, test it to Destruction.
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