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Simulated image as displayed using VGA mode 13h resolution and color abilities (aspect ratio not corrected).Default VGA 256-color palette
Mode 13h is the standard 256-color mode on VGA graphics hardware introduced in 1987 with the IBM PS/2. It has a resolution of 320×200 pixels.[1] It was used extensively[citation needed] in computer games and art/animation software of the late 1980s and early to mid-1990s. "13h" refers to the number of the mode in the VGA BIOS. The "h" stands for hexadecimal.
Mode 13h provides programmers with a linear 320x200 block of video memory, where each byte represents one pixel. This allows ease of programming at the expense of access to other useful features of the VGA hardware.
Given the aspect ratio of a 320×200 resolution screen for use on a 4:3 display, Mode 13h does not have square pixels.[2]
^Cite error: The named reference Brown was invoked but never defined (see the help page).
^Fabien Sanglard, GAME ENGINE BLACK BOOK: WOLFENSTEIN 3D, 2nd edition, Chapter Hardware, page 59, freely available at https://fabiensanglard.net/gebb/index.html
Mode13h is the standard 256-color mode on VGA graphics hardware introduced in 1987 with the IBM PS/2. It has a resolution of 320×200 pixels. It was used...
CSM thus lacks INT 13h and other interrupts. Typically, UEFI drivers use LBA-addressing instead of CHS-addressing. Under real mode operating systems,...
The primary advantage of Mode X is that it has square pixels: a resolution of 320×240 instead of the standard VGA Mode13h which is 320×200. It is usually...
he introduced a way to adjust VGA mode13h to have a resolution of 320×240 with square pixels, which he called Mode X. He worked on the 3D rendering for...
common standard functions. 00h through 0fh are CGA. BIOS interrupt call Mode13h VESA BIOS Extensions Ralf Brown's Interrupt List "What is efifb? — The...
software utilities to draw Mode13h graphics but which lacked the ability to render VGA graphics in other higher-resolution modes. While the Vega VGA may...
with several options, including a file manager, DOS, a clock and Mega Drive mode. The machine included IBM drivers bundled on a floppy disk, which enabled...
LBA-assisted translation mode, the BIOS accesses the hardware using LBA mode, but also presents a translated CHS geometry via the INT 13h interface. The number...
low-level way, for example, by patching low-level BIOS interrupts such as int 13h, the low-level disk I/O interrupt. When a program issued an int 21h call...
program to be relocatable. DL may contain the drive number, as used with INT 13h, of the boot device. SS:SP points to a valid stack that is presumably large...
the operating system depends on (particularly interrupts INT 10H and INT 13H). HP Integrity Virtual Machines provides UEFI boot on HP Integrity Servers...
two bytes in order to facilitate making calls to the original/legacy INT 13h BIOS disk access routines, where 16 bits were divided into sector and cylinder...
more sophisticated. Advanced techniques included hooking low-level disk INT 13H BIOS interrupt calls to hide unauthorized modifications to files. The first...
along with the DOS Protected Mode Interface (DPMI) allow the programs to run in either 16-bit or 32-bit protected mode and still have access to the DOS...
charging[citation needed]. The device does not provide the BIOS service (INT 13h) for reading from a hard disk. Drivers have been partially written for this...
Interface (AHCI) CE-ATA Consumer Electronics (CE) ATA FATA (hard drive) INT 13H for BIOS Enhanced Disk Drive Specification (SFF-8039i) IT8212, a low-end...
emulation" mode is generally the more reliable method. The BIOS will assign a BIOS drive number to the CD drive. The drive number (for INT 13H) assigned...
the BPB value is set to FFh.) DH bit 5 = 0: device supported through INT 13h; else: don't care (should be zero). DH is supported by some IBM BIOSes. Some...
address mode (Real Mode) of the x86 CPU, so programs that call BIOS either must also run in real mode or must switch from protected mode to real mode before...
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