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Archive for the 'VT100' Category

Double-Height Characters Drawn in Wrong Position

Thursday, December 27th, 2012

When using VT-series emulations on the new iPad (3rd or 4th generation) double-height characters are drawn in the wrong position. This does not affect the original iPad, iPad 2, iPhone or iPod Touch.

CR 1098

VT102 Does Not Line Draw

Wednesday, May 2nd, 2007

Connect to any system using VT102 emulation. On TCP/IP connections it reports as “linux” emulation. And it doesn’t properly handle line draw characters. The Use non font-based line draw option doesn’t help. The workaround is to use VT100 emulation, which has the same capabilities.

CR 741

TERM Falls Back to VT100

Friday, April 27th, 2007

If you select a 25-line emulation in TERM, such as SCOANSI or Wyse60-25, but there are not 25 lines available on screen, TERM falls back to VT100 emulation. There’s no warning when this happens. TERM just starts behaving differently than expected.

CR 523

Can Only Transparent Print if Bypassing Driver

Monday, April 23rd, 2007

If the terminal emulation in TinyTERM is set to any emulation that uses \033[5i as the transparent print on code — SCOANSI, ANSI, VT220, etc. — printing to the Windows printer produces no output. If you check Bypass Printer Drivers, then it works, provided the printer allows it. This only affects TinyTERM 4.42.

CR 720, fixed in TinyTERM 4.43

Problems with VT Emulations in vi

Friday, April 20th, 2007

Open a reasonable-size file in vi, one that has more than a couple screens of information. Move partway through, then put the cursor in the middle of the screen. Type “dd” or Shift-J to delete a line. You get a Dr. Watson in tt.exe, stack overflow error.

If the file doesn’t take up a full screen of emulation, you won’t get a Dr. Watson error. However, the entire screen will scroll deleting a single line.

If you don’t delete lines, but just scroll down through the file, you can’t scroll back up. And the status line scrolls with the file text as well.

This affects all VT-series emulations. The scrolling problem affects the Linux emulation as well.

CR 458, Dr. Watson
CR 459, scrolling
both fixed in TinyTERM 4.31

Emulation Incorrect in ANSI or VT100

Monday, April 9th, 2007

Using TERM or TinyTERM over a serial connection, with the emulation set to ANSI, the display is OK, but the arrow keys don’t work. With the emulation set to VT100, the arrow keys work, but instead of lines, it displays the letter d repeatedly.

To solve both the arrow key and line draw problems, check to see if the UNIX tty port is set to a word length of 7. If it is, set the port for a word lengthy of 8, 1 stop bit and no parity. The host application is sending 8-bit sequences for the line draw characters. With these changes, VT100 emulation will work.

Line Draw Prints as Characters

Monday, February 26th, 2007

When printing a screen in TinyTERM 4.03, lines will sometimes print as odd characters instead. This is corrected with this patch, through the implementation of multiple code pages for printing. Installation instructions and documentation are in this document. TinyTERM versions 4.04-4.12 incorporate the patch.

The problem was reintroduced in TinyTERM 4.13 with the Use printer fonts option in the new Printer Setup dialog. The same thing happened printing direct to device. This was fixed in TinyTERM 4.21.

CR 318, fixed in TinyTERM 4.21
CR 429, not fixed in VT100
CR 584

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