Search found 127 matches

by Petari
Sun Jan 21, 2018 8:41 am
Forum: CHAT FORUM
Topic: Improvising an EPROM programmer
Replies: 2
Views: 59

Re: Improvising an EPROM programmer

IR LED for erasing ? That must take really plenty of time to erase. Mercury vapor lamp (with removed phosphor) is about 1000x stronger, I guess.
by Petari
Sun Jan 21, 2018 8:37 am
Forum: SOFTWARE PROGRAMMING & DISCUSSION
Topic: Falcon programmer to team up with ARM 'coder'
Replies: 2
Views: 51

Re: Falcon programmer to team up with ARM 'coder'

What is exact speed ratio of stock Archimedes and stock (basic machine versions) Falcon ? Here I mean using some good CPU and memory speed SW.
by Petari
Thu Jan 18, 2018 6:57 pm
Forum: BENCHMARKS
Topic: TOS1.00 vs TOS1.04
Replies: 2
Views: 59

Re: TOS1.00 vs TOS1.04

What would be really surprising is if someone could activate blitter in TOS 1.00 :lol:
by Petari
Wed Jan 17, 2018 8:02 am
Forum: DISPLAYS & CONVERTERS
Topic: Atari ST Display Basics
Replies: 16
Views: 1039

Re: Atari ST Display Basics

It is possible that Falcon works at 60 Hz refresh rate. That is set in NV RAM. You should be able to see it in monitor's Information mode or like. Some people added resistors to RGB lines in cables for ST(R), because analog amplitudes are too high. I don't know about that Falcon perhaps gives more s...
by Petari
Tue Jan 16, 2018 12:59 pm
Forum: SOFTWARE PROGRAMMING & DISCUSSION
Topic: Let's play cartoons on STE, TT, Falcon
Replies: 5
Views: 276

Re: Let's play cartoons on STE, TT, Falcon

Blackstar, Thundar the Barbarian, Dungeons and Dragons, there a lot of very cool cartoons that would be super cool viewed on our Atari's! :) I'm sure that they are great. As many other ones ... I will do one more Pink Panther episode - that one, where he wants to be superman is really hilarious. Pa...
by Petari
Tue Jan 16, 2018 11:10 am
Forum: SOFTWARE PROGRAMMING & DISCUSSION
Topic: AutoShort cleanup
Replies: 4
Views: 50

Re: AutoShort cleanup

I think that main error is that it loads items in reversed order ! :lol:
by Petari
Tue Jan 16, 2018 8:28 am
Forum: RTC (Real time clock)
Topic: RTC SUPER CAP WIP
Replies: 9
Views: 233

Re: RTC SUPER CAP WIP

Super capacitor - I remember them from video recorders . Capacity in range of 1 farad ? How long it can supply clock chip (when no power) ?
by Petari
Sun Jan 14, 2018 1:47 pm
Forum: RTC (Real time clock)
Topic: no-software internal RTC
Replies: 11
Views: 126

Re: no-software internal RTC

Since RP5C15 has 6 bits for year, it means that it could count years up to 2043 - calculating by start year=1980 , and 6 bits can be 0-63 . That means that chip self is actually OK for this century too ( well, for first 43% of :D ) , but TOS handles it not properly. Probably just displaying part - b...
by Petari
Sun Jan 14, 2018 12:09 pm
Forum: RTC (Real time clock)
Topic: no-software internal RTC
Replies: 11
Views: 126

Re: no-software internal RTC

RTC chips, at least those old ones store not exact year value, but some number of bits for year. Similar is with TOS date format. It has 7 bits for year, and starts at 1980 - so value 0 in year field means 1980 . Some may ask: how then it's not year 2000 compliant ? I guess there are some code parts...
by Petari
Sun Jan 14, 2018 11:22 am
Forum: RTC (Real time clock)
Topic: no-software internal RTC
Replies: 11
Views: 126

Re: no-software internal RTC

Actually the tos supports directly at least one rtc ic, the ricoh rp5c15, it's hard to find and you have to develop a board, but all you need to use it is atari's control panel. I made it in past. After project in ST Magazine - if I remember correct. No board developing, just on prototype board. It...