ID Number: Q32058
3.2x 3.30
MS-DOS
Summary:
In the Microsoft Press book "Advanced MS-DOS," under "ROM BIOS
Interrupt 10H function 09H" on Page 409, the replication factor is
stated as producing valid results only for the current row and
results are unpredictable if the replication factor exceeds the
maximum column value for the display.
The Microsoft Press book "The Peter Norton Programmer's Guide to
the IBM PC" states on Page 179 that in text mode, the duplicated
characters will successfully wrap around; however, in graphics mode,
the characters will not wrap around.
This ROM BIOS service will work in both text and graphics modes. In
text mode, the replicated characters will successfully wrap around on
the display to the next row if a replication value exceeds the maximum
column of the display.
In graphics mode, replicated characters will successfully appear as
long as the replication factor does not exceed the maximum column
value of the display. If the replication factor does exceed the
maximum column value, the results are unpredictable. Often, the
characters will wrap around, but only at one scan line lower than the
preceding row, destroying the appearance of both rows.