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Grid: ask the screen how wide it is

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It said forty and filled exactly half of an eighty column screen.

CosmOS asks for the wide mode when it starts, because its own help text is
seventy-four characters across. So a program that assumes the shape the
MACHINE wakes up in is wrong about the shape the SYSTEM is running in - and
the Programming Manual says as much where it describes the columns and rows
registers: how big the screen is, is asked for rather than assumed.

Port 0x32 says. One instruction, and the program now fills whatever it is
given.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E2JrLzFvuFX9fgi1LDRjrW
This commit is contained in:
Anachronaut
2026-08-30 17:46:49 -04:00
co-authored by Claude Opus 5
parent 1a8a5efe03
commit 848103f5e4
1 changed files with 7 additions and 1 deletions
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Programs/CosmOS/Apps/Grid.asm
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@@ -329,7 +329,13 @@ everyRow:
SETD.0 RowAttribute
STQ.0
INIA 0d40
; ---- How wide the screen is, asked rather than assumed ----
;
; This said forty, and filled exactly half of an eighty column screen. CosmOS asks for the
; wide mode when it starts, because its own help text is seventy-four characters across -
; so a program that assumes the shape the MACHINE wakes up in is wrong about the shape the
; SYSTEM is running in. The screen will say if it is asked.
INA 0x32
SETD.0 RowCells
STA.0