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cosmic frog
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Joined: 09/02/2012
Location: United Kingdom
Posts: 302

Posted: 09:17am 28 Jun 2014

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Hi,
Just built Geoffs ASCII Video Terminal on strip board (Vero Board) and it's all working fine, but I've never used a VT100 before and know nothing about ESC Codes.
I looked at some guides on Google but still non the wiser.
I did try the example in the manual - PRINT CHR$(27)+"[Z4;240;144;100Z"; but all I get on screen is > [Z4;240;144;100Z" just as you would expect from a PRINT statement.
If someone could help me out it would be much appreciated.
Just to be able to clear the screen would be great (ESC [2J)?

Thanks. Dave.

TassyJim

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Joined: 07/08/2011
Location: Australia
Posts: 6349

Posted: 01:07pm 28 Jun 2014

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What are you connecting to?

Getting > [Z4;240;144;100Z suggests that the ESC character is not being received by the terminal.
Why you get the ending quote is a puzzle.

What you do get suggests that the terminal setting are correct.
Assuming that you are connecting to a micromite, try
PRINT MM.VER
and PRINT MM.DEVICE$

I am not able to test the line drawing commands but they all look OK to me.

ESC [2J is definitely correct and should work on all terminals.

Jim

VK7JH
MMedit

VK2MCT
Senior Member

Joined: 30/03/2012
Location: Australia
Posts: 120

Posted: 01:57pm 28 Jun 2014

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Hi I've not used VT100 before, but I'm wondering if the " are actually reverse quotes or some other microsoft weirdism brought across by cut and paste. Suggest to try " from the keyboard.

Ignorantly,

John B.

TassyJim

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Joined: 07/08/2011
Location: Australia
Posts: 6349

Posted: 02:51pm 28 Jun 2014

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VK2MCT said I'm wondering if the " are actually reverse quotes or some other microsoft weirdism brought across by cut and paste.
John B.

A good thought and it was the first thing I thought of.
Assuming he is talking to a micromite, 'smart quotes' would give a syntax error for the first quote.
The micromite doesn't seem to need the closing quote and a 'smart quote' there would print it out but the VT100 command would be acted on first.

Jim

VK7JH
MMedit

cosmic frog
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Joined: 09/02/2012
Location: United Kingdom
Posts: 302

Posted: 01:04am 29 Jun 2014

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Thanks for all your comments.
The " at the end shouldn't be there, it's a mistake on my part (typo) sorry.
Just to clarify, if I type >PRINT CHR$(27)+"[2J" It should clear the screen but it just prints >[2j
I am using a Micromite with the latest firmware connected to Geoffs ASCII Video Terminal. I can write programs and run them fine, but it's the ESC Codes I cannot get to work.

Thanks. Dave.

Geoffg

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Joined: 06/06/2011
Location: Australia
Posts: 3308

Posted: 03:55am 29 Jun 2014

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Your example (>PRINT CHR$(27)+"[2J") uses an uppercase J while your output (>[2j) shows a lowercase j. Which one were using? Escape codes are case sensitive.

Also, you should terminate the PRINT statement for escape codes with a semicolon (;) to suppress the automatic addition of CR and LF.

Try this, it should work:

PRINT CHR$(27)+"[2J";

Geoff

Geoff Graham - http://geoffg.net

cosmic frog
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Joined: 09/02/2012
Location: United Kingdom
Posts: 302

Posted: 07:35am 29 Jun 2014

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Thanks Geoff, that seems to have fixed it.
So all it needed was to be in upper case, who have thought it

Thanks to everyone who tried to help me with this.

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