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Merge pull request #5599 from maron2000/fix_int21ah0a

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Int21h AH=0x0a Keep cursor position if keyboard buffer full
This commit is contained in:
Jonathan Campbell
2025-03-26 11:00:06 -07:00
committed by GitHub
parent d89109b6c1 b0a799e820
commit fc3dcc496f
1 changed files with 6 additions and 0 deletions
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6
src/dos/dos.cpp
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@@ -1294,7 +1294,13 @@ static Bitu DOS_21Handler(void) {
}
if (read == free && c != 13) { // Keyboard buffer full
uint8_t bell = 7;
uint8_t page = real_readb(BIOSMEM_SEG, BIOSMEM_CURRENT_PAGE);
uint8_t col = CURSOR_POS_COL(page);
uint8_t row = CURSOR_POS_ROW(page);
BIOS_NCOLS;
DOS_WriteFile(STDOUT, &bell, &n);
if(CURSOR_POS_COL(page) > col)
INT10_SetCursorPos(row, col, page); // stay where we were
continue;
}
DOS_WriteFile(STDOUT,&c,&n);