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by Petari
Mon May 28, 2018 4:54 pm
Forum: SOFTWARE PROGRAMMING & DISCUSSION
Topic: Controlling the TT sound system.
Replies: 16
Views: 1977

Re: Controlling the TT sound system.

You will encounter many other games turning TT speaker back on. Simply because programmers were not aware that PSG port A will be used for such function. Same problems appear with floppy code on Mega STE - there is bit on that port what controls VME bus - if some SW changes it's state machine usuall...
by Petari
Sun May 27, 2018 10:50 am
Forum: SOFTWARE PROGRAMMING & DISCUSSION
Topic: Controlling the TT sound system.
Replies: 16
Views: 1977

Re: Controlling the TT sound system.

It were not mine TTs - as said, I got them "for testing", "for some time".
by Petari
Sun May 27, 2018 8:00 am
Forum: SOFTWARE PROGRAMMING & DISCUSSION
Topic: Controlling the TT sound system.
Replies: 16
Views: 1977

Re: Controlling the TT sound system.

Audio DMA system is same in STE, Mega STE and TT - except internal speaker in TT . So, you can use docs about Microwire for STE . It should be in Atari Compendium what port , which bit controls internal speaker on/off . It may be same as in case of Falcon - PSG port A, bit 6. I'm not sure, you shoul...
by Petari
Sun May 27, 2018 7:46 am
Forum: HARDWARE DISCUSSIONS
Topic: MMU address line resistors changed to 68ohms. Why?
Replies: 3
Views: 794

Re: MMU address line resistors changed to 68ohms. Why?

I'm not sure that reason is some mistake or lack of 33 Ohm resistors. Little larger values causing better noise suppression. Not to mention that people who doesn't know what doing normally changes not resistors just like that. Even less likely is that resistors were ever removed - with plan to put s...
by Petari
Sat May 26, 2018 5:39 pm
Forum: INTRODUCE YOURSELF
Topic: Hello from sunny Lancashire!
Replies: 5
Views: 1805

Re: Hello from sunny Lancashire!

Oh nooo ... This is start of forum end :lol:
Welcome to place where hopefully we will be able to communicate in right way, in good spirit, opened mind. :2k2:
by Petari
Thu May 24, 2018 2:00 pm
Forum: ELECTRONICS
Topic: Are Bypass Capacitors REALLY needed?
Replies: 6
Views: 1689

Re: Are Bypass Capacitors REALLY needed?

I really don't see what was the point. Are such videos REALLY needed ? Some people benefits from them, for sure. I did not hear everything new. Both things are important - layout and capacitors. But it's much better to have them as much possible close to chip pins. I often solder them there directly...
by Petari
Fri May 18, 2018 2:12 pm
Forum: SOFTWARE PROGRAMMING & DISCUSSION
Topic: AES 3.4 into Tos 2.06/3.06
Replies: 19
Views: 3629

Re: AES 3.4 into Tos 2.06/3.06

Sometimes it's slower not because new code is slower really, but because some new things are added in same routine, and that usually means slower resulting work. And AES and TOS have many of multi-function/parameter calls. For instance text outprint, where can set really lot of styles, sizes and oth...
by Petari
Fri May 18, 2018 9:43 am
Forum: SOFTWARE PROGRAMMING & DISCUSSION
Topic: AES 3.4 into Tos 2.06/3.06
Replies: 19
Views: 3629

Re: AES 3.4 into Tos 2.06/3.06

I tried that fastboot TOS 2.16. It just boots not ACSI hard disk, so I really don't get what that fastboot means, and why is it in name, and not AES from Falcon something. Indeed unfinished, as some things make it crash. Now, considering complain of tuxie that no OS changes - really ? I made some 3-...
by Petari
Tue May 15, 2018 7:17 am
Forum: HARDWARE DISCUSSIONS
Topic: IC deterioration
Replies: 12
Views: 2111

Re: IC deterioration

Things are that for some decades there is already general rule about 'consum' electronic - including home, office computers, TVs and like: There are more failures in first couple months than usual - what is caused by manufacturing errors. Then, about 10 years failure count is low. After 10 years it ...
by Petari
Sat May 12, 2018 1:46 pm
Forum: HARDWARE DISCUSSIONS
Topic: IC deterioration
Replies: 12
Views: 2111

Re: IC deterioration

Humidity (in air) is what harms chips with plastic case. No wonder that industry and military package is much better.
And I guess that there may be internal degradation too - nothing is 100% stable over time. Then, every power on or off is shock, what makes more harm than days of work.

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