Search found 503 matches

by Petari
Sun Sep 02, 2018 11:32 am
Forum: FLOPPY DRIVES KITS & UPGRADES
Topic: Internal Gotek/FlashFloppy and external disk drive
Replies: 10
Views: 318

Re: Internal Gotek/FlashFloppy and external disk drive

Here is pretty much confusion caused by different pin layouts. Well visible on given link: http://old.pinouts.ru/HD/InternalDisk_pinout.shtml I recommend that if have ohmmeter follow signals from Atari PSG chip - Drive Sel A and Drive Sel B and connect Drive Sel A to Drive Sel B of Gotek - assuming ...
by Petari
Sat Sep 01, 2018 3:18 pm
Forum: CHAT FORUM
Topic: What if Commodore and Atari had merged
Replies: 3
Views: 112

Re: What if Commodore and Atari had merged

Well, John Lennon couldn't become president of USA because was born in wrong place. But everything other is 'so highly likely' :lol:
Or rather likeable :roll:
by Petari
Sat Sep 01, 2018 1:00 pm
Forum: FLOPPY DRIVES KITS & UPGRADES
Topic: Internal Gotek/FlashFloppy and external disk drive
Replies: 10
Views: 318

Re: Internal Gotek/FlashFloppy and external disk drive

SF314 is set as drive A, because it was first drive for older ST machines without internal drive. Need to change line what leads to drive select (as A) to drive B line at Atari floppy cable. That can do in drive or in Atari .
by Petari
Fri Aug 31, 2018 9:55 am
Forum: HARDWARE DISCUSSIONS
Topic: Practical TT upgrade?
Replies: 5
Views: 180

Re: Practical TT upgrade?

... F030 stuff could possibly be re-arranged or patched (PPera Im looking at you! :mrgreen: ) and certainly new software could be made aware of the changes in address mapping, etc. (TOS 5.01 anyone? :D ) ... There is big difference between TT and Falcon: first has 32-bit data bus, second 16-bit. Th...
by Petari
Fri Aug 31, 2018 7:57 am
Forum: CHAT FORUM
Topic: Halt Catch Fire depicting computer industry Atari ST SE2
Replies: 8
Views: 263

Re: Halt Catch Fire depicting computer industry Atari ST SE2

I watched first season and partially second one. Surely not realistic or historically accurate.
Atari ST was visible only once, for short, but main characters never shown using it. Most of it happened with C64 in first season.
by Petari
Thu Aug 30, 2018 8:55 am
Forum: 8 BIT CORNER
Topic: You have got to be kidding me - c64 on ebay
Replies: 25
Views: 1018

Re: You have got to be kidding me - c64 on ebay

I think that reason for raising prices is need for components - custom chips in first place. That C64 was probably taken out from trash somewhere, but some chips may be OK. Of course if seller did not take them out already :lol: I remember that was not easy to find C64 chips back in 80-es, when it w...
by Petari
Wed Aug 29, 2018 5:58 pm
Forum: DISPLAYS & CONVERTERS
Topic: Internal scan doubler idea
Replies: 4
Views: 629

Re: Internal scan doubler idea

.. I recommend using 2x 2KB SRAMs instead of a dual-ported RAM - you can write to one device while the other is being read, then exchange them at the end of each scanline. This is the method I used for the scandoubler in my FPGA project. You would need to use either tristate bus transceivers or els...
by Petari
Wed Aug 29, 2018 8:52 am
Forum: SOFTWARE PROGRAMMING & DISCUSSION
Topic: Scrolling tricks
Replies: 20
Views: 480

Re: Scrolling tricks

One thing is changing color in every line slightly - used usually for gradient sky , and other is using complete different palette for screen regions. Later is used a lot - top part with status has one palette, then middle part for actual play other one, and bottom can be with third palette too . Of...
by Petari
Tue Aug 28, 2018 8:21 pm
Forum: STOS
Topic: STOS not working with 4MB
Replies: 16
Views: 336

Re: STOS not working with 4MB

OK, here is better fix : This changes how bus error works - will just continue if there is overshot in screen draw. Would that corrupt memory outside of screen area if draw happens ? When bus error is triggered it writes nowhere - because no RAM above 4 MB. So no memory corruption. Screen is at top...
by Petari
Tue Aug 28, 2018 8:13 pm
Forum: RTC (Real time clock)
Topic: no-software internal RTC
Replies: 46
Views: 2559

Re: no-software internal RTC

My last post here: You talk generally about TOS, while your solution works only with 2.06. What I don't like is that you present this as something 'absolute', "no-software", and it works only with 2.06 . Well, my Mega STE with 2.06 does not need it - it has Ricoh RTC chip :D Last time: TOS calculate...