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   Ultrascreen200 (Tandy Model 200) release history
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Ultrascreen200 gives the Tandy Model 200 a 60-column by 21-line small-font
display (60 by 20 when the function-key labels are showing) where the ROM
natively does 40 by 8. It is a port of Daniel Born's Ultrascreen100. Many
thanks to Daniel Born for the original, which made this port possible.


1.3  (2026)
  Fixed the cursor when leaving 60-column mode. Going from SCREEN 1 back to the
  normal 40-column SCREEN 0 could leave the cursor misbehaving. It now homes
  cleanly.

  A little smaller. The scroll scratch buffer moved into a ROM work area that
  sits idle while Ultrascreen is showing 60 columns, handing about 50 more
  bytes of RAM back to you.


1.2  (2026)
  Fixed the uninstall prompt. In 1.1, declining the "REMOVE Ultrascreen?"
  prompt (answering N, or any key other than Y) could leave the system
  unstable and hang on the next trip through the menu. 1.2 keeps Ultrascreen
  safely resident when you decline, so the prompt is dependable both ways:
  Y removes it, anything else keeps it.


1.1  (2026)
  Much faster TEXT on real hardware. The 60-column TEXT screen used to fall
  behind the keyboard, especially toward the right side of a line.
  Ultrascreen200 now keeps a character shadow of the screen and skips
  redrawing any cell that has not changed, so typing keeps up and editing
  stays smooth. Opening a brand-new TEXT file is nearly instant now too,
  instead of the several-second pause it used to have.

  Fixed a serious 1.0 bug: with Ultrascreen200 resident, turning the computer
  off and back on could cold start it and erase your files. It now leaves the
  system's warm-start marker untouched, so power cycles resume normally.


1.0  (2026)
  Initial 60x21 small-font release for the Model 200. Full 60-column console
  across BASIC, the TEXT editor, TELCOM (main screen and Term), ADDRSS and
  SCHEDL, with function-key labels and a reverse-video banner.


Note: for a full-screen BASIC editor on the Model 200 (edit any line already
on the screen, arrow keys, insert mode, reflowing backspace/delete), see the
separate Ultrascreen200 2.0A "full-screen" product (USC2FE).

MSPLAN needs the top of RAM for its own work area, so it cannot run while
Ultrascreen200 is resident, and rendering it in 60 columns is not feasible (it
bank-switches its own ROM, so Ultrascreen is never even called while it runs).
Uninstall Ultrascreen first (CLEAR 0,MAXRAM), run MSPLAN, then reinstall. If
you forget, MSPLAN's own "MP work area in use" message will remind you.
