kodak80 H4 build (x2)
Re: kodak80 H4 build (x2)
Do you have a scope that you can start checking signals out with as Derkim has been doing and as in my fix it guide ?
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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.
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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: kodak80 H4 build (x2)
Yes, I have a 2 channel scope which I can use so will look to work through your guide over the next few nights.
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
Creator of the Atari ST Review magazine archive: https://www.chillichai.com/atari-st-review
Re: kodak80 H4 build (x2)
@exxos Any reason FC2 has a pull up on both RP5 and RP8? Pin 9 on both SILs.
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
Creator of the Atari ST Review magazine archive: https://www.chillichai.com/atari-st-review
Re: kodak80 H4 build (x2)
@exxos sorry, another question.
We have been working through you testing guide and AS and DTACK are both going high as expected but my board is still only showing white screen and no floppy access. All pull-ups are fine, and cpu puns check out as per testing guide so need some further pointers.
The BGACK PULL-UP FIX is my question as JP16 is already connecting R150 4.7k resistor as a pull-up. Adding a 2.2k resistor with JP16 jumpered is in parallel. JP 16 would need to be removed for the 2.2k fix to work correctly.
We have been working through you testing guide and AS and DTACK are both going high as expected but my board is still only showing white screen and no floppy access. All pull-ups are fine, and cpu puns check out as per testing guide so need some further pointers.
The BGACK PULL-UP FIX is my question as JP16 is already connecting R150 4.7k resistor as a pull-up. Adding a 2.2k resistor with JP16 jumpered is in parallel. JP 16 would need to be removed for the 2.2k fix to work correctly.
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
Creator of the Atari ST Review magazine archive: https://www.chillichai.com/atari-st-review
Re: kodak80 H4 build (x2)
Good spot @kodak80. So thats a 1K1 pull-up on FC2
Re: kodak80 H4 build (x2)
My address being read from ROM is
0000000000001110
Which is wrong so just checking the soldering on the TOS ROM pins.
0000000000001110
Which is wrong so just checking the soldering on the TOS ROM pins.
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
Creator of the Atari ST Review magazine archive: https://www.chillichai.com/atari-st-review
Re: kodak80 H4 build (x2)
I just bent up one of the SIL pins to remove the double-up.
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
Creator of the Atari ST Review magazine archive: https://www.chillichai.com/atari-st-review
Re: kodak80 H4 build (x2)
oops
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: kodak80 H4 build (x2)
Its the same on the original..
Yes there are 2 resistors in parallel, but when the jumper is removed, you then need 2 resistors to pull up each side of the now broken signal. Its probably how I missed the resistor off in the first place as I assumed it was connected anyway.
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.