The blob on the middle jumper pin? It triggers me more that the (E)EPROM is not in a sockettofro wrote:That picture BTW triggers my "dodgy solder joint" alert.mk79 wrote:separate the outgoing pins from the Eprom pins like Chr$ did here https://www.ebay.de/itm/203613323341...
Still possible to get Minerva ROM
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Re: Still possible to get Minerva ROM
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Re: Still possible to get Minerva ROM
Because the pins aren't completely engulfed in solder at the top/in the holes? The through-holes are totally full of shiny metal from top to bottom. It's fine tofro .tofro wrote:That picture BTW triggers my "dodgy solder joint" alert.mk79 wrote:separate the outgoing pins from the Eprom pins like Chr$ did here https://www.ebay.de/itm/203613323341...
By far the most shoddy thing was one I sent to the USA recently.... I forgot to put the sticker on!
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Collector of QL related computers, accessories and QL games/software.
Ask me about felt pads - I can cut them to size and they have proved excellent for mdv data recovery.
Collector of QL related computers, accessories and QL games/software.
Ask me about felt pads - I can cut them to size and they have proved excellent for mdv data recovery.
Re: Still possible to get Minerva ROM
I'm sure it is. Pictures can misguide.Chr$ wrote:tofro wrote:The through-holes are totally full of shiny metal from top to bottom. It's fine tofro .
ʎɐqǝ ɯoɹɟ ǝq oʇ ƃuᴉoƃ ʇou sᴉ pɹɐoqʎǝʞ ʇxǝu ʎɯ 'ɹɐǝp ɥO
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Re: Still possible to get Minerva ROM
These will destroy any socket you put them into. Or won't even fit in case of turned-pins sockets.
Re: Still possible to get Minerva ROM
Good point Marcel - I am sure that it might be possible to find right angle turned pin headers though, so the jist of the idea is there.
Re: Still possible to get Minerva ROM
Ah yes, OK, same concept but achieved by different means Pretty sure those things didn't exist back in the day - we used long-pin turned sockets (designed for thick multi-layer PCBs, I believe). Got the scaling wrong on Mk I and the pin pitch was just fractionally under 0.1", requiring a bit of ... um ... "technique", to get them assembled! "don't force it - use a bigger hammer"
Re: Still possible to get Minerva ROM
Finesse it Jon, finesse it with a hammer and pliers...QJumpJon wrote:Ah yes, OK, same concept but achieved by different means Pretty sure those things didn't exist back in the day - we used long-pin turned sockets (designed for thick multi-layer PCBs, I believe). Got the scaling wrong on Mk I and the pin pitch was just fractionally under 0.1", requiring a bit of ... um ... "technique", to get them assembled! "don't force it - use a bigger hammer"
One third of the original QView Minerva crew.
Re: Still possible to get Minerva ROM
Why is an RTC useful on a stand alone computer? Is it so you know when to make a cup of tea?Derek_Stewart wrote:I have Minerva MkII that I was repairing broken pins on the Rom Socket.
Re: Still possible to get Minerva ROM
He he, I guess it'd be useful for lazy people like me not to have to set it each time I start the computer.Ruptor wrote:Why is an RTC useful on a stand alone computer? Is it so you know when to make a cup of tea?Derek_Stewart wrote:I have Minerva MkII that I was repairing broken pins on the Rom Socket.
More seriously, I guess it'd probably be useful on a Minerva Mkii when interfacing to real world hardware via the I2C bus.
If there's such a thing as a power on/off interface for the I2C bus, you could even make it switch on the kettle at your designated tea break time, Ruptor
AFAIK, no I2C interface to fill the kettle first, though. That's down to you...
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Re: Still possible to get Minerva ROM
It's probably also useful in correctly time stamping files you might be writing to a disk - makes it easier then to know which copy might be the latest one?
and bearing in mind the stock seconds counter in the ZX8302 is probably going to have some wonderful random garbage in it when it starts - so worth having that set correctly in any case
and bearing in mind the stock seconds counter in the ZX8302 is probably going to have some wonderful random garbage in it when it starts - so worth having that set correctly in any case