Me? I'd rather sensibly gone to bed
ALPHA MODIFICATIONS
Re: ALPHA MODIFICATIONS
If it ain't broke, test it to Destruction.
- rubber_jonnie
- Site Admin
- Posts: 10604
- Joined: Thu Aug 17, 2017 7:40 pm
- Location: Essex
- Contact:
Re: ALPHA MODIFICATIONS
I'm waaaay behind, on account of other priorities, work, home maintenance etc.
I'm kind of at the stage now thinking I should wait in order to apply all the fixes in one go to see how it turns out!!
I've barely touched an Atari in weeks now
Still, winter is coming,which means I should have more Atari time!!
I'm kind of at the stage now thinking I should wait in order to apply all the fixes in one go to see how it turns out!!
I've barely touched an Atari in weeks now
Still, winter is coming,which means I should have more Atari time!!
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...
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...
Re: ALPHA MODIFICATIONS
I can verify that those fixes work on my board too.
And as with Icky's my floppy doesn't want to play either.
Well done guys.
And as with Icky's my floppy doesn't want to play either.
Well done guys.
If it ain't broke, test it to Destruction.
Re: ALPHA MODIFICATIONS
Does your display do that periodic blanking like Ickys too or is your picture stable?Forgottenmyname wrote: ↑Wed Sep 26, 2018 5:47 pm I can verify that those fixes work on my board too.
And as with Icky's my floppy doesn't want to play either.
Well done guys.
I've really enjoyed watching the progress of this from virtually no picture to a nearly functional machine in under 2 weeks
If I had a spare motherboard, I'd be well up for being a beta board customer!
Re: ALPHA MODIFICATIONS
I don't remember seeing it flicker like on the video.
I will try running it again a little later on and see what happens.
I'm wondering if it's a difference in monitor type?
I will try running it again a little later on and see what happens.
I'm wondering if it's a difference in monitor type?
If it ain't broke, test it to Destruction.
Re: ALPHA MODIFICATIONS
FLOPPY FIX
Fixies missing pull ups on the LS06 buffers (never were on any schematic either!)
Solder 10K resistors to either the IC on the bottom of the PCB, or the resistors in a row on top of PCB (which ever is easier).
For example solder a 10K resistor to the highlighted pins on the resistors, then solder the free ends to 5V (tap from pin 14 of LS7406)
Fixies missing pull ups on the LS06 buffers (never were on any schematic either!)
Solder 10K resistors to either the IC on the bottom of the PCB, or the resistors in a row on top of PCB (which ever is easier).
For example solder a 10K resistor to the highlighted pins on the resistors, then solder the free ends to 5V (tap from pin 14 of LS7406)
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 ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
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 ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
Re: ALPHA MODIFICATIONS
Here is a photo of my quick hack to get this up and running - a cluster of resistors tied to pin 14:exxos wrote: ↑Wed Sep 26, 2018 11:50 pm FLOPPY FIX
Fixies missing pull ups on the LS06 buffers (never were on any schematic either!)
Solder 1K resistors to either the IC on the bottom of the PCB, or the resistors in a row on top of PCB (which ever is easier).
For example solder a 1K resistor to the highlighted pins on the resistors, then solder the free ends to 5V (tap from pin 14 of LS7406)
Re: ALPHA MODIFICATIONS
The stripes don't match up
Does it need to 1k? I'm running short on those by the looks.
Does it need to 1k? I'm running short on those by the looks.
If it ain't broke, test it to Destruction.
Re: ALPHA MODIFICATIONS
No idea. I suggested 10K to Icky.. I guess almost anything would work, even 100K maybe .Forgottenmyname wrote: ↑Thu Sep 27, 2018 10:19 am Does it need to 1k? I'm running short on those by the looks.
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 ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
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 ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
Re: ALPHA MODIFICATIONS
If you've kept up, your board should now look a little something like this
P.s. not done the 16mhz mmu fix as it was optional.
P.s. not done the 16mhz mmu fix as it was optional.
If it ain't broke, test it to Destruction.