Search found 363 matches

by Petari
Thu Sep 20, 2018 11:37 am
Forum: HARDWARE ISSUES
Topic: Falcon IDE read failing at higher frequencies
Replies: 12
Views: 906

Re: Falcon IDE read failing at higher frequencies

I don't think that replaced IDEtoSD or SD card, especially the later have some influence in it. Surely it has - because they are both dead now. ;-) Fortunately I have the same brands of those so I can rule out some incompatibility introduced by new hardware. I think that I was clear with my writing...
by Petari
Thu Sep 20, 2018 9:04 am
Forum: HARDWARE ISSUES
Topic: Falcon IDE read failing at higher frequencies
Replies: 12
Views: 906

Re: Falcon IDE read failing at higher frequencies

It is clear that IDE works not well now, after that shortcut, when it is overclocked. And that before it worked. I don't think that replaced IDEtoSD or SD card, especially the later have some influence in it. Surely they are not all same, some can work faster, some not. It is just that they are new ...
by Petari
Wed Sep 19, 2018 8:11 pm
Forum: HARDWARE ISSUES
Topic: Falcon IDE read failing at higher frequencies
Replies: 12
Views: 906

Re: Falcon IDE read failing at higher frequencies

Most likely Combel is damaged - injured, not killed.
by Petari
Tue Sep 18, 2018 6:54 pm
Forum: STF REMAKE PROJECT
Topic: TOS startup sequence.
Replies: 17
Views: 1744

Re: TOS startup sequence.

It's simple in fact. Negative value is 16-bit, and if you sub it from $10000 will get 16-bit positive value - what is in case of HW port always negative number (bit 15 is 1). You can use Windows calculator in programmer and hex mode for it. -$7FFF = $10000-$7FFF = $8001 - MMU config reg. Physical ad...
by Petari
Tue Sep 18, 2018 3:07 pm
Forum: STF REMAKE PROJECT
Topic: TOS startup sequence.
Replies: 17
Views: 1744

Re: TOS startup sequence.

Here is begin of TOS 1.04 (ST) , with some comments . TOS104SU.ZIP Can add more comments, just need some time and what is exactly of interest. It's not hard to follow once you get used on strange HW addressing at most places: suba.l a5,a5 lea -$7800(a5),a0 move.b #7,(a0) move.b #$C0,2(a0) move.b #$E...
by Petari
Tue Sep 18, 2018 8:00 am
Forum: STF REMAKE PROJECT
Topic: TOS startup sequence.
Replies: 17
Views: 1744

Re: TOS startup sequence.

Actually, initial palette is set right after Vfreq. set, so nothing happens between those 2 :D Checked in TOS 1.04 and 2.06 .
It is all in very early stage, so many things will be set after it, before first screen output.
by Petari
Wed Sep 12, 2018 4:58 pm
Forum: INTRODUCE YOURSELF
Topic: Hello from the USA
Replies: 8
Views: 739

Re: Hello from the USA

Welcome back to Atari waters :D
Mark Williams C here: https://mega.nz/#F!4JVH3ayK!Bu5-bDni0flCfau3KoTJvA
by Petari
Tue Sep 11, 2018 4:48 pm
Forum: SOFTWARE PROGRAMMING & DISCUSSION
Topic: Adapted games: what makes them incompatible at >16 MHz?
Replies: 14
Views: 1552

Re: Adapted games: what makes them incompatible at >16 MHz?

There is in some cases special screen displaying code used, to achieve more than 16 colors on ST(E) at once. That works not on Falcon, TT, of course - will get some mess normally. Stays for F1 GP intro too. Speed gain depends from many factors. In some cases code self limits framerate - what prevent...
by Petari
Mon Sep 10, 2018 12:53 pm
Forum: INTRODUCE YOURSELF
Topic: Hi from Ireland
Replies: 8
Views: 1043

Re: Hi from Ireland

... If you remove the keyboard of the Mega ST and switch it on, the computer won’t boot up and sits there sending alert-beeps to notify you that the keyboard is disconnected That pretty much describes my Falcon at bootup. Hope it's a disconnected cable, rather than a dead keyboard microcontroller. ...
by Petari
Mon Sep 10, 2018 9:30 am
Forum: CHAT FORUM
Topic: Should some old computer do all (same) as some new ?
Replies: 9
Views: 1152

Re: Should some old computer do all (same) as some new ?

I have a PDF of the ST Profibuch. My description would be: "An overwhelming 1500 page behemoth of knowledge". But then i still could not even read a single value from the Disk and get the expected value. .... I take it as complement to Atari :D Machine is so complex that really needs very-very long...