Hi everyone!
I have a 30 years old Atari 850 interface (SIO -> 4x serial, 1x parallel)
Unfortunately it's not working 100% properly.
When I turn it on and subsequently turn on my Atari 800XE (Floppy not attached), the Computer boots it's handle from the 850 properly.
Your hear the squeaking sound and Basic reports with "? FRE(0)" about 1K less free RAM than booting without the 850.
But this works only, when my 850 was turned off for a longer while, f.e. longer than 30 minutes.
When I turn off my Atari 800XE and reboot after some seconds, I get lot's of "BOOT ERROR"s on my screen and a lot of buzzing sounds, interrupted by some squeaky sounds.
OK - I turn off my Atari 800XE and my 850, wait a while (fe. one minute), turn my 850 on and hereafter my Atari 800XE, I get these "BOOT ERROR"s again.
I have to turn off my 850 and have to wait at least half an hour, before I can properly boot the handle again.
Does anybody have an idea how to fix this?
I already opened the 850 case and cleaned all pins of the socketed ICs, resoldered pins on the pcb, replaced some capacitors, but always the same issue.
Thomas
I have a 30 years old Atari 850 interface (SIO -> 4x serial, 1x parallel)
Unfortunately it's not working 100% properly.
When I turn it on and subsequently turn on my Atari 800XE (Floppy not attached), the Computer boots it's handle from the 850 properly.
Your hear the squeaking sound and Basic reports with "? FRE(0)" about 1K less free RAM than booting without the 850.
But this works only, when my 850 was turned off for a longer while, f.e. longer than 30 minutes.
When I turn off my Atari 800XE and reboot after some seconds, I get lot's of "BOOT ERROR"s on my screen and a lot of buzzing sounds, interrupted by some squeaky sounds.
OK - I turn off my Atari 800XE and my 850, wait a while (fe. one minute), turn my 850 on and hereafter my Atari 800XE, I get these "BOOT ERROR"s again.
I have to turn off my 850 and have to wait at least half an hour, before I can properly boot the handle again.
Does anybody have an idea how to fix this?
I already opened the 850 case and cleaned all pins of the socketed ICs, resoldered pins on the pcb, replaced some capacitors, but always the same issue.
Thomas