compyx / 1x1editor

Simple 1x1 charset editor

1x1 characterset editor

(c) 2016-2021, Compyx/Focus

Introduction

This is a very simple 1x1 characterset editor for the C64. I couldn't find any editor that suited me (either joystick controlled or some weird keyboard control that didn't make sense), so I wrote my own (again).

Right now it functions the way I want it. It does not have a disk menu, it can't even load or save charactersets right now. If you need to load/save your characterset, you have to do it manually, using either your cartridge's ML monitor, or your emulator's monitor. The characterset is located at $2000 at the moment.

Building

To build this editor, you need a fairly recent version (V1.55.2480 or later) of 64tass. Either use make or run 64tass directly like this: 64tass --ascii --case-sentitive --m6502 src/main.s -o 1x1editor.prg

Instructions

Use the following keys to control the editor:

key(s)	purpose
Cursor keys	Move the cursor in the zoom area
Space	Plot a pixel, in single color mode this inverts the current pixel, in multi color mode this plots the currently selected color
@, ;, /, :	Move the cursor in the view area (on PC: [, ', /, ;)
1-4	Select color (only in multi color mode: 1=$D021, 2=$D022, 3=$D023,4=$D800+)
Shift + 1-4	Increment color
b / B	Copy to buffer / paste from buffer
c / C	Clear current character / clear characterset
g / G	Copy CHARGEN A ($D000-$D7FF) or CHARGEN B ($D800-$DFFF) to character set
m / M	Mirror character in X / Y direction
x / X	Rotate character left / right
y / Y	Rotate character up / down
F5	Toggle multi color mode

Hold the Commodore key to display CHARGEN A in the view, and hold Control to show CHARGEN B in the view. This can be useful when creating a custom charset and figuring out where which character is in CHARGEN (I always forget).