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Jul - The Cutting Room Floor - Challenge: IBM PC Tetris Easter Egg New poll - New thread - New reply
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Sisu
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Posted on 06-02-15 02:27:31 PM Link | Quote
Shortly after Alexey Pajitnov created Tetris on Электроника-60 it was ported to IBM PC by schoolboy Vadim Gerasimov. His version of events is here:

http://vadim.oversigma.com/Tetris.htm

including the carrot "By the way, this version has an Easter Egg. Although not a sophisticated one. I wonder if anyone can discover it."

which has yet to be found AFAIK. He more recently gave a bit of clarification here:

http://harddrop.com/wiki/Talk:Vadim_Gerasimov#Easter_Egg

"I no longer remember the key combo/sequence. This isn't much of an Easter Egg anyway. It should just show a message. Nothing fancy. The message is encrypted in the code, so you can't see it in a debugger."

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divingkataetheweirdo

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Posted on 06-03-15 12:33:06 AM Link | Quote
That's rather interesting. My first instinct is to search for any time interrupts are called for the keyboard. Seeing as this was made with Turbo Pascal, it shouldn't be too hard to look into this.

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divingkataetheweirdo

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Posted on 06-05-15 02:08:54 AM (last edited by divingkataetheweirdo at 06-06-15 06:27:34 AM) Link | Quote
Haven't found the way to activate the easter egg yet, but I did find something a little strange with the controls. There's an alternate set of controls that's likely the result of making sure the user can still control the game with Caps Lock on/the Shift key held.

Left - 7, Home
Rotate - 8, Up
Right - 9, Page Up
Speed Up - 6, Right
Draw Next - 1, End
Drop - 4, Space, Left

6/6/2015: Still jack squat here. This easter egg likely relies on a keyboard buffer to activate it. Sisu, I'm curious if you know anything about MS DOS programs in general.

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divingkataetheweirdo

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Posted on 06-25-15 03:37:55 AM Link | Quote
Bump-a-loo.

I should mention I'm searching around Version 3.12, the latest version of Tetris on MS-DOS. I had no luck whatsoever in find the keys I was supposed to press to access it.

Vadim also has the original version, which I also have. It's important to know which version to search for, as the two have differences here and there. This is particularly true with the title screen and the game settings.

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Sik

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Posted on 07-15-15 03:18:42 PM Link | Quote
Old post but:

Originally posted by divingkataetheweirdo
Haven't found the way to activate the easter egg yet, but I did find something a little strange with the controls. There's an alternate set of controls that's likely the result of making sure the user can still control the game with Caps Lock on/the Shift key held.


More likely the fact that early PCs didn't have separate arrow keys so they were exactly the same keys as the numpad (sharing the same scancodes and such, of course). Later PCs use an "extended scancode" mark to indicate which is which while retaining backwards compatibility with programs that don't know about it (which is most likely what's going on here).
divingkataetheweirdo

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Posted on 08-30-20 04:28:21 PM Link | Quote
Five years (and one month, and fifteen days) later , but Devin finally found it:


A small easter egg was added in v3.12. When the "game over" message appears, press Ctrl+A, Ctrl+D to display a copyright message at the top of the screen:

(C) A.Pajitnov V.Gerasimov

Unlike the other text in the game, this message is XOR-encrypted to prevent tampering.


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Halian

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Posted on 10-15-20 05:29:32 PM Link | Quote
maple post-o-matic 9.3
That seems pretty excessive for a copyright notice. o.O

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Posted on 10-17-20 05:53:15 AM Link | Quote
Is it a significant factor that it was written in Communist Russia?
Didn't Pajitnov's employment at the time have some situation where the Soviet government could try to claim credit for the game?
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Posted on 10-17-20 06:05:07 AM Link | Quote
UESCTerm 802.11 (remote override)
044 05.10.2337

Originally posted by KingMike
Is it a significant factor that it was written in Communist Russia?
Didn't Pajitnov's employment at the time have some situation where the Soviet government could try to claim credit for the game?

they can and did - tetris license was chiefly held by ELORG (an organization controlled by USSR's Ministry of Foreign Trade) for the rest of the USSR's life (and still for years afterwards as a private company)

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Halian

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Posted on 10-17-20 07:58:36 PM (last edited by Halian at 07-11-21 06:11:12 AM) Link | Quote
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Which organization had a monopoly on the import and export of computer hardware and software in the Soviet Union.

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Jul - The Cutting Room Floor - Challenge: IBM PC Tetris Easter Egg New poll - New thread - New reply


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