Differences

This shows you the differences between two versions of the page.

--- c64_terminology [2026/01/17 16:09] – [REU] walter
+++ c64_terminology [2026/02/01 12:38] (current) – [File formats] walter
@@ Line 1: / Line 1: @@
 ====== What are you talking about? ======
-Every profession or nice has its own terms people in the know expect everyone to know. - Everyone knows that ... right?
+Every subgroup has its own terms people //in the know// expect everyone to know. - Everyone knows that ... right?
 In the wiki is a function active to show a short explanation for certain terms, like what you get when you write C64. - To modify or add those contact [[Walter]].
 This page is to try to give some information about terminology used in the Commodore and retro computer community.
+===== File formats =====
+  * **TAP** — Raw Tape Image
+    * A byte‑accurate recording of the actual magnetic pulses on a Commodore cassette tape.
+  * **PRG** — Single Program File
+    * A raw C64 program as it appears in RAM, with a 2‑byte load address at the start.
+    * Key traits:
+       * Contains one program or data block.
+       * Loads instantly in emulators or SD2IEC.
+  * **D64** — Disk Image (1541 floppy)
+    * What it is:
+      * A full 170 KB image of a 5.25" 1541 disk, including directory, sectors, BAM, and filesystem.
+    * Key traits:
+      * Can contain multiple PRGs, data files, and custom loaders
+  * **G64**
+    * Which is a d64 with additional data to represent low level floppy info. Used for disks with disk based copy protection.
+  * **CRT** — Cartridge Image (ROM dump) & **T64** — Tape Container (simplified tape image)
+    * What it is:
+      * A virtual tape file that stores one or more PRGs, but not the real pulse‑timing of a tape.
+    * Key traits:
+      * Contains a directory of PRGs extracted from a tape.
+      * Does not preserve turbo loaders or custom tape protection.
+      * Loads much faster than a real tape because it skips the pulse‑level detail.
 ===== REU =====
-{{c64w>REU}}
+A {{c64w>RAM Expansion Unit}} is a hardware device that increases the amount of RAM available to a computer.  The C64U has this functionality build in and can be enabled in the menu.
+{{youtube>3c2jhh1f5FE?}} \\
+//The 8-Bit GUY explains how the REU works on the classic C64//
+===== What is border removal? =====
+Border removal exploits VIC-II behavior when $D011 bit 4 is cleared at specific raster lines. This lets demos display sprites and graphics in the border area.
-{{youtube>3c2jhh1f5FE?}}