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Re: Playing with the Atari 2600 POP
Golden Child #124511 05/13/25 01:58 AM
Joined: Mar 2006
Posts: 1,082
Likes: 7
PA, USA
L
Lord Nightmare Offline
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Lord Nightmare
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L Offline
Joined: Mar 2006
Posts: 1,082
Likes: 7
PA, USA
So we don't know if that really is the EPN3116C in the AIM-65... Whatever it is in the AIM-65, it has 10 input lines, and an odd/even select set of two enable pins to choose one set of 10 of the 20 thermal heads; the aim-65 printer has a motor which oscillates the 20 heads back and forth in a serpentine pattern, and has a sort of 'hblank' state from the motor showing either a tachometer style feedback, and/or a pulse when it reaches the beginning of its cycle.

"When life gives you zombies... *CHA-CHIK!* ...you make zombie-ade!"
Re: Playing with the Atari 2600 POP
Golden Child #124512 05/13/25 05:44 AM
Joined: Feb 2014
Posts: 1,220
Likes: 223
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Golden Child
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Golden Child
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Came across the TRS-80 Portable Terminal PT-210 and so far I'm able to type on it.

Oddly, the keyboard matrix is basically "in order", seeming to match the table in rom.

Code

      300  30 31 32 33 34 35 36 37 38 39 3A 3B 2C 2D 2E 2F   0123456789:;,-./
      310  1B 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F   .ABCDEFGHIJKLMNO
      320  50 51 52 53 54 55 56 57 58 59 5A 20 0D 0A 7F 00   PQRSTUVWXYZ ....
      330  08 B8 2F F0 43 04 A0 FE B8 32 A0 83 B8 2F F0 83   .8/pC. ~82 .8/p.

It uses the i8039, the i8251, the i8279, and the i8243.

[Linked Image from i.imgur.com]
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