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  1. emoore, I don't know if you already found this...

    emoore,

    I don't know if you already found this Tekscope article on the 4027 architecture - it might help understand the HLS color mapping: Tekscope_10-4_Nov_1978.pdf

    Here is another 4027...
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    Dave, Do you also have a 68000 disassembler? ...

    Dave,

    Do you also have a 68000 disassembler?

    I'm trying to figure out how the Tektronix 4041 UTILITY ROM detects that one of the Option ROMs contains a PROM file system (my post Looking for...
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    Mattis, I assume the "analog board" is your...

    Mattis,

    I assume the "analog board" is your 4051 "Display Board"?

    Looking at my 4052 Display Board schematics, the two big power resistors, R71 (390 ohm) and R75 (330 ohm) on each side of the...
  4. Recovering old Tektronix 4050 program tapes to PC

    Wow, I just finished uploading to my github repository 65 more Tektronix 4050 graphics computer BASIC programs and data files from the Interfacing T1 tape - that I previously could only recover 13...
  5. emoore, Here is your intecolor 2427 terminal...

    emoore,

    Here is your intecolor 2427 terminal photo you emailed, showing color graphics, that you got from sending the Tektronix 4027 commands you found in one of my 4027A Color Graphics Demo...
  6. emoore, I should have looked at the MENU...

    emoore,

    I should have looked at the MENU program in that folder - it gives the following descriptions for the programs in files 2 through 8:




    4027A/4052 Compliment color graphics demo
  7. Welcome to vcfed - emoore! I have three links...

    Welcome to vcfed - emoore!

    I have three links to Tektronix terminal vector graphics files:
    mmcgraw74
    4027A - 4052 Compliment Color Graphics Demo
    rricharz
    Tek4010 and 4014 Storage Tube...
  8. Tingo, No, I don't have those utility programs...

    Tingo,

    No, I don't have those utility programs :(

    I can't find anyone that ever had them - and I asked vintagetek.org to check their microfiche collection and they scanned the user manual for...
  9. Looking for 68000 disassembler help

    I worked this past weekend on disassembling the 4041R04 UTILITY1 ROM image that I posted on my github site:...
  10. Roland, Did you get serial working on your...

    Roland,

    Did you get serial working on your 4052?

    Monty
  11. Jos, That's a very long retention time. I...

    Jos,

    That's a very long retention time.

    I think your USB concept would be fine - most of us (including me) would likely have a favorite image. Loading a new image from a PC with USB would be...
  12. Jos, Ok - I just thought that would make the...

    Jos,

    Ok - I just thought that would make the system standalone.

    Your approach with battery backup on the SRAM will do that too. You will only need a PC to put in a different image.

    How long...
  13. Jos, Great work! If you are going to modify...

    Jos,

    Great work!

    If you are going to modify the Transera firmware - could you initialize the SRAM with files from a micro SD card when the CALL "INIT" is executed? That way the micro SD card...
  14. Tektronix 4051 Memory Dump Program - Source Code Listing

    I had a request for the Motorola 6800 source code for my 1979 assembly language program for Tektronix 4051 Memory Dump.

    See my post #66 earlier in this thread for a screenshot running this program...
  15. Tektronix 4052 graphics computer (early 1980's) for sale on EBAY for $1250

    I am not associated with the seller - just posting an auction I found on EBAY.

    http://www.vcfed.org/forum/attachment.php?attachmentid=64181&d=1603107911
    ...
  16. Jos, Thanks - that matches my test results. ...

    Jos,

    Thanks - that matches my test results.

    You may want to put a note about that address swap of the RS-232 Printer Interface in your MFM document.

    Monty
  17. Jos, Hope you can easily fix your 4052. I...

    Jos,

    Hope you can easily fix your 4052.

    I posted updates to my github repo:
    Updated the 4052 File Manager-01 folder with the corrected U13 EPROM image
    Updated the Jos MFM Test Files folder...
  18. I forgot to describe the different CRC columns in...

    I forgot to describe the different CRC columns in the program.

    The Tektronix CRC list for 4052/4054 is a little mysterious, and took me a while to decode how they did it.

    Some of the CRC for...
  19. Thanks Roland! Have you been able to try the...

    Thanks Roland!

    Have you been able to try the RS-232 yet?

    Monty
  20. MFM is WORKING!!!

    Jos,

    I believe your MFM is NOW WORKING!!!

    I figured out my 4907 issue - the 3rd ROM I uploaded had a stuck data bit - so that image was corrupted.
    I re-captured the 3rd ROM in my cartridge...
  21. Another update from testing. I moved the...

    Another update from testing.

    I moved the 4050E01 to my 4052 computer and inserted the original ROM Packs in the same slots as my MFM17 test image.

    I also modified my CRC program to CRC-16 the...
  22. Jos, Looking again at the Opt 1 Serial...

    Jos,

    Looking again at the Opt 1 Serial Interface in the 4052/4054 schematics, I think the RS-232 Printer Interface won't work with RTS/CTS hardware handshake - the 68B50 in Option1 doesn't connect...
  23. Jos and Roland, I figured out my issue with...

    Jos and Roland,

    I figured out my issue with getting the MFM RS-232 printer interface to work again - my rewiring of my DB-9 connector had only changed one of the two handshake signals, now my MFM...
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    Roland, I think that is typical as these tapes...

    Roland,

    I think that is typical as these tapes are 40 years old.

    I had success with a plastiband on NOS DC100 tapes - but I put the tapes in a dehydrator for 2 days first. Otherwise the oxide...
  25. I just posted a youtube video of the gplanet...

    I just posted a youtube video of the gplanet graphic.

    It only takes 1 minute 42 seconds to draw the graphic at 9600 baud.

    https://www.youtube.com/watch?v=vpE-Zx7yNpo
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