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General Turtle TT2500
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Lars Brinkhoff
Oct 2, 2020, 2:17:34 AM10/2/20
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Hello,
I'm writing a simulator for the General Turtle TT2500. I have various
informal descriptions, an assembler, and some software. If anyone has
any information, or photos, etc, I'd love to see it.
The processor is a custom TTL design with some pipeline hazards exposed.
There are two displays: one for text and another for vector graphics.
There is an UART and a keyboard. The software accepts input from the
UART; text with Datapoint cursor codes goes to the text display, and
turtle graphis commands (including SPIN and GROW) to the vector display.
Best regards,
Lars Brinkhoff
I'm writing a simulator for the General Turtle TT2500. I have various
informal descriptions, an assembler, and some software. If anyone has
any information, or photos, etc, I'd love to see it.
The processor is a custom TTL design with some pipeline hazards exposed.
There are two displays: one for text and another for vector graphics.
There is an UART and a keyboard. The software accepts input from the
UART; text with Datapoint cursor codes goes to the text display, and
turtle graphis commands (including SPIN and GROW) to the vector display.
Best regards,
Lars Brinkhoff
Lars Brinkhoff
Nov 8, 2020, 6:49:57 AM11/8/20
to
The simulator now works. Here is a short demo running the original
microcode written by Danny Hillis. The simulator is attached to a
PDP-10 emulator running ITS. A Maclisp program was used to send turtle
commands.
https://www.youtube.com/watch?v=3MM-sItpgaQ
microcode written by Danny Hillis. The simulator is attached to a
PDP-10 emulator running ITS. A Maclisp program was used to send turtle
commands.
https://www.youtube.com/watch?v=3MM-sItpgaQ
Jecel
Dec 28, 2020, 2:01:24 PM12/28/20
to
Lars,
great job! This is an important step in preserving an obscure, but valuable, part of our computing history. How did you get the microcode and software and other details to implement this?
-- Jecel
great job! This is an important step in preserving an obscure, but valuable, part of our computing history. How did you get the microcode and software and other details to implement this?
-- Jecel
Lars Brinkhoff
Apr 21, 2021, 6:39:33 AM4/21/21
to
Minsky's hardware description with all details to implement the
emulator, and Hillis' microcode source and binaries.
Some of those files are trickling out at a slow pace. These
are published with permission from Hillis.
https://github.com/larsbrinkhoff/tt2500-raw-data
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