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Re: Sandord - progress
Posted: 07 Nov 2018 21:46
by sandord
I now have most parts soldered to the board.
I'm leaving out the two connectors at the top right until I'm ready to test them. I have currently got two spacers screwed in their place so I'd rather keep those for now.
There are a few parts I'm currently not sure I have the right ones:
- Chrystal 32.0000 MHz: isn't this supposed to be 32.xxxx?
- Header strips: how long do the leads need to be? I'm pretty sure the keyboard header should have about 8mm long leads, so default length doesn't work there. But what about the RAM board connectors?
IMG_20181107_223719.jpg
Re: Sandord - progress
Posted: 07 Nov 2018 21:48
by exxos
I used normal header pins for RAM & KB headers... but have to use proper Falcon RAM card for that as my blue card I think needs longer pins..
32mhz will work, just will show 99% speed. 32.08 is what I am going for now , (100%)
Re: Sandord - progress
Posted: 07 Nov 2018 22:01
by Icky
sandord wrote: 07 Nov 2018 21:46
I now have most parts soldered to the board.
I'm leaving out the two connectors at the top right until I'm ready to test them. I have currently got two spacers screwed in their place so I'd rather keep those for now.
There are a few parts I'm currently not sure I have the right ones:
- Chrystal 32.0000 MHz: isn't this supposed to be 32.xxxx?
- Header strips: how long do the leads need to be? I'm pretty sure the keyboard header should have about 8mm long leads, so default length doesn't work there. But what about the RAM board connectors?
IMG_20181107_223719.jpg
32.0000 MHz will work but you won’t get 100% scores in GEMBench. You can swap it for a 32.084988 MHz to get 100% scores
For the RAM board header pins. If you have the Exxos SIMM ram board then you will need very long pins. An original Falcon board doesn’t need to be as long.
Having long header pins are good as you can also use them on the monitor and floppy un-f*ck boards
Re: Sandord - progress
Posted: 07 Nov 2018 22:05
by Icky
Icky wrote: 07 Nov 2018 22:01
sandord wrote: 07 Nov 2018 21:46
I now have most parts soldered to the board.
I'm leaving out the two connectors at the top right until I'm ready to test them. I have currently got two spacers screwed in their place so I'd rather keep those for now.
There are a few parts I'm currently not sure I have the right ones:
- Chrystal 32.0000 MHz: isn't this supposed to be 32.xxxx?
- Header strips: how long do the leads need to be? I'm pretty sure the keyboard header should have about 8mm long leads, so default length doesn't work there. But what about the RAM board connectors?
IMG_20181107_223719.jpg
32.0000 MHz will work but you won’t get 100% scores in GEMBench. You can swap it for a 32.084988 MHz to get 100% scores
For the RAM board header pins. If you have the Exxos SIMM ram board then you will need very long pins. An original Falcon board doesn’t need to be as long.
Having long header pins are good as you can also use them on the monitor and floppy un-f*ck boards
Just took a look at the height of headers. This is what I ordered
40 Pin 2.54mm 20mm Long Header Pins
Re: Sandord - progress
Posted: 07 Nov 2018 22:18
by Icky
exxos wrote: 07 Nov 2018 21:48
I used normal header pins for RAM & KB headers... but have to use proper Falcon RAM card for that as my blue card I think needs longer pins..
32mhz will work, just will show 99% speed. 32.08 is what I am going for now , (100%)
Ah Exxos beat me to it :)
Re: Sandord - progress
Posted: 08 Nov 2018 11:50
by IngoQ
sandord wrote: 06 Nov 2018 15:44
Ah, so I got it the other way around. Funny, the brown one seems to be of much higher quality.
The brown ones seem to be from Preci-dip
http://www.precidip.com/en/Products/PGA ... 4-008.html
Re: Sandord - progress
Posted: 08 Nov 2018 12:23
by sandord
Ah, thanks. I have no idea why Farnell decided to put that one in my package while I ordered 3M sockets only.
Re: Sandord - progress
Posted: 08 Nov 2018 12:59
by IngoQ
Maybe they thought the'll do you a favor ;-)
But more likley the picking guy just had a serious hangover... :)
Re: Sandord - progress
Posted: 08 Nov 2018 13:01
by sandord
IngoQ wrote: 08 Nov 2018 12:59
But more likley the picking guy just had a serious hangover... :)
I'm pretty sure that was the reason yes :lol:
I used it for the blitter, which I'm probably not going to install anyway.
Re: Sandord - progress
Posted: 08 Nov 2018 15:33
by sandord
Ugh, so I soldered half of the resistor arrays backwards. I somehow thought that they were serial networks but obviously they're parallel with a common ground. :x
Luckily I have a very good solder sucker since a few weeks!