Search found 505 matches

by Petari
Sat Sep 08, 2018 8:33 am
Forum: HARDWARE DISCUSSIONS
Topic: 4mb STFM with accelerator - was there an equivalent way back when?
Replies: 19
Views: 927

Re: 4mb STFM with accelerator - was there an equivalent way back when?

Mega ST was intended for professional users in first place. Separated case and keyboard is big advantage, and there is space for expansions. And no RF modulator, color encoder - so works only with monitors and rare TVs (then) with RGB input. Later STFMs had blitter too - but not all. Some people mad...
by Petari
Thu Sep 06, 2018 8:23 am
Forum: INTRODUCE YOURSELF
Topic: Hi from Ireland
Replies: 8
Views: 355

Re: Hi from Ireland

Since it was not powered on for many years it is sure that electrolyte capacitors are very weak. Just don't turn it on before replacing most of them - in PSU in first place - because more damage can happen.
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: 396

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: 125

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: 396

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: 221

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: 305

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: 1181

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: 732

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: 576

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...