Simulate baud rates with this Linux program

Рет қаралды 2,507

Күн бұрын

Пікірлер: 30

@foobarf8766 2 ай бұрын

FYI Baud is a symbol rate, bits per symbol in FSK modulation is simply 1 so baud equals speed but only for FSK. 56k modems were still ~14,400 baud but used QAM which packed 4 bits into each symbol.

@mulad 2 ай бұрын

Yeah, when my parents met, they were working at an office where several people shared a 1200-baud link to the company's main campus, so one person getting a big terminal update would slow things down for everyone else

@ahmad-murery 2 ай бұрын

The baud was also used to measure the speed of saving/loading data to/from cassettes in old personal computers such as MSX which can handle 1200/2400 baud. Those were really nice days. Thanks Jim!

@terrydaktyllus1320 2 ай бұрын

Yes, over here in the UK I had the Sinclair ZX Spectrum which was, of course, another tape-loading personal computer. I never experienced the MSX at the time but I have played quite a few MSX games recently with emulators - some good games on there that we did not get on the Spectrum, or we got poor quality conversions of.

@ahmad-murery 2 ай бұрын

@@terrydaktyllus1320 Also, since Spectrum was a leader in game developments a lot of games was ported to the MSX without considering the new capability MSX has and ended up with bad ports. Only if MSX had the type of developers both Spectrum and Commodore had they would push MSX to the limit. I like both system though

@terrydaktyllus1320 2 ай бұрын

@@ahmad-murery Yes, I know MSX had much better colour capabilities than the ZX Spectrum and that "lazy" ports happened to other machines too. So what are your favourite MSX games? For me on the ZX Spectrum, it would be Lords Of Midnight, Laser Squad, Highway Encounter, Cyclone and Fighter Pilot (as well as the "obvious" ones like Manic Miner, Jetset Willy, Jetpac, etc.)

@ahmad-murery 2 ай бұрын

@@terrydaktyllus1320 Castle, Castle Excellent, Zanac, Goonies, Knightmare, Hyper Rally, Bolder Dash, Hero, Twin Bee, Kings Valley, Q*Bert, Thexder, GP world. There is more cool games that I can't remember right now

@block_place1232 2 ай бұрын

Ayy freedos posted

@wherami 2 ай бұрын

I liked the speed of 300 baud

@judgegroovyman Ай бұрын

Me too. Its a satisfying speed that never makes me feel overwhelemed. It calmed my mind just watching that.

@cetx 2 ай бұрын

This is fascinating. So cool to understand how terminals worked in the past.

@quincy1048 2 ай бұрын

teletype 33 the sound of the future...love it...yea I started working with computers in 1980 and was on a teletype at 110 baud connected to a school district computer, from there I went up in speed and with each jump no matter how minor you felt gifted to get it...I remember doing pascal in college from home at 300baud and i would upload run or compile and do all modifications on my atari 1200xl in action! and reupload the whole thing each time...but yea 1200baud was very liberating when it showed up, got into bbs at that point and modem speed made a difference on ansi text based game graphics...yea running code from a bbs door...oh yes...cool video.

@happysprollie 2 ай бұрын

I spent a lot of time on BBS systems at 300baud - because you had to. Still feels slightly magical somehow - you were aware of talking to another system

@terrydaktyllus1320 2 ай бұрын

Yes, it was magical, even at 300 baud - dialing in every evening to get my fix of "Trade Wars" or checking out the latest ANSI artworks. Good times!

@xmris 2 ай бұрын

back in the day was quicker for me to visit the guys that run local BBS with my backpack full of floppies...

@MechaFenris 2 ай бұрын

BBSing in the good old days. :) I remember when I saw the first 1200 baud modem... my friend was rich. :P Rather his dad was. It was fascinating. Man, those were the days.

@Daniel_Klugh 2 ай бұрын

What's this "120 baud" stuff about?!? The TeleType model 33 used a 7E2 110BPS connection yielding 10CPS. The model 37 used a 7E1 150BPS connection for 15CPS. The linked-to WWW site keeps dividing by 8 for some reason. TeleTypes were asynchronous 7-bit terminals. So 7 data bits plus a parity bit sandwiched between a START & STOP bit. (two STOP bits for the 33)

@nicholashylton6857 10 күн бұрын

Impressive! But can you simulate yelling at your brother to get off the phone at 10 PM so you can dial your favourite BBS?

@veganaiZe 2 ай бұрын

I feel like the speeds demonstrated here are nearly twice as fast as I actually remember them being. Maybe the parity/stopbits/flowcontrol had something to do with it?

@freedosproject 2 ай бұрын

It might be a little off, but it's still pretty close. The original point of the demonstration program was to demonstrate different characters per second, and the easiest way to do that was to emulate a "baud" style. But I think it's close enough as a demo.

@tubeDude48 Ай бұрын

I come from the 70's when I had my first computer, (the Heathkit H-8), and I don't remember 300 Baud being as fast as you're showing.

@freedosproject Ай бұрын

This was perhaps a bit too simple of a demonstration to exactly reproduce the older baud speeds. But I think it's close to the 300 baud Hayes modem we had.

@tubeDude48 Ай бұрын

@@freedosproject - I'm old, so the mind may be missing on all cylinders! I had one of those modems that used the cup's with the phone.

@freedosproject Ай бұрын

@@tubeDude48 I recall the accoustic couplers ('cups with the phone') were 150 baud or even 120 baud, depending.

@tubeDude48 Ай бұрын

@@freedosproject - Yes, I remember those as well. I called a friend of mine that still had his, and he said it was 300 Baud.