BeebRFSMaker

This is a Windows WinUI 3 GUI application for packing files into a Compressed ROM Filing System sideways ROM image, and extracting them back out. Compatible with comprom.pl v2.10 by Greg Cook.

Windows WinUI 3 Microsoft Store BBC Micro Free

Here is how a ROM built with BeebRFSMaker appears on a BBC Micro or emulator:

BeebRFSTool

This is the corresponding command-line version, designed for use in batch files and build pipelines. Shares the same compression engine as BeebRFSMaker but runs standalone with no GUI required.

Windows Command Line MSI Installer BBC Micro Free

C:\LocalOnly\RFS> BeebRFSTool pack .\BeebFiles NewRFSCompr.rom
BeebRFSTool v2026-06-08_16:11 - BBC Micro ROM Filing System (RFS) Pack, List, and Extract Tool by Kara Ottewell
Compatible with both standard RFS and Greg Cook's compressed RFS "comprom" format v2.10
Packing with compression enabled (compressed RFS) to NewRFSCompr.rom.
 Title          : "CompressedRFS"
 Copyright      : "KLO 2026"
 Version string : "(2026-06-08 17:28)"
 Catalog title  : "*CompRFS*"
+---+------------+----------+----------+-------+-------+------+------+
| # |Name        |Load      |Exec      |Raw    |Compr. |% Orig| Inf? |
+---+------------+----------+----------+-------+-------+------+------+
| 1)|aaa_txt     |&00000000 |&00000000 |    44 |    30 |68.2% |      |
| 2)|bcdefghijk  |&00000000 |&00000000 |   442 |   263 |59.5% |      |
| 3)|Defende     |&00005000 |&00008023 |  4785 |  2754 |57.6% |(.inf)|
| 4)|DefenMC     |&00001900 |&00000E00 |  9121 |  7598 |83.3% |(.inf)|
| 5)|test_nocom  |&00000000 |&00000000 |    44 |    38 |86.4% |      |
| 6)|Zeddy_txt   |&00000000 |&00000000 |   167 |   145 |86.8% |      |
+---+------------+----------+----------+-------+-------+------+------+
ROM Uncompressed:  14163 bytes
ROM Compressed  :  10858 bytes
ROM Overhead    :   1958 bytes (header + stub + dictionary + digraphs)
ROM Total       :  16384 bytes (12816 padded to full &4000 size)
ROM Space Used  :  12816 bytes  (78% utilised)
ROM Image Saved: NewRFSCompr.rom

BBC Micro Utilities

Three command-line utility programs for viewing BBC Micro files or disk images.

Windows Command Line MSI Installer BBC Micro Free

I wanted some command line utilities to display the content of .dsd files, and decode BBC BASIC files along with "PRINT#"-type BBC data files, so I wrote them as console applications using the .NET framework. The utilities are:

• BBCBasicToText — display a tokenized, binary BBC Micro BASIC file as text, HTML, or bbcode.
• BBCDataFileToText — show BBC PRINT# type data files as text, HTML, or bbcode.
• BBCReadDiskImage — display *DIR-style output of .DSD or .SSD disk images, with the ability to export files individually and dump sectors.

All three tools can produce colour output — strings, keywords, and so forth are coloured differently — and can output plain text (in colour when writing to a command prompt window), bbcode, or HTML.

  10 REM New version of 'INTRO' from
  20 REM Welcome pack
  30 REM By John Coll & Andrew Gordon
  40 ON ERROR GOTO 630
  50 ENVELOPE 1,1,-RND(50),-RND(50),-RND(45),255,255,255,127,0,0,-127,127,0
  60 SOUND 1,1,255,255
  70 DIM COM%11
  80 M0=650:M1=500:M2=708:M3=104:M4=288:M5=550:M6=720:M7=450:M8=5
  90 MODE5
 100 VDU5
 110 VDU23,255,255,255,255,255,255,255,255,255
 120 GCOL0,135
 130 CLG
 140 VDU18,0,129,24,128;128;1152;896;16,18,0,135,24,256;256;1024;768;16,26
 150 FORI%=M1 TO M2 STEP M3:PROCSWOOSH(M0):PROCLETTER:NEXT
 160 $COM%="DISC SYSTEM"
[Snip rest of "Welcome" BASIC program]

KOContour

KOContour reads in elevation data files from your computer, or an elevation server such as the Open Topo Data server, and creates contour maps from them.

Windows UWP Microsoft Store Free

I was looking for a contour map of various places but couldn’t find a simple, free one that did what I wanted. So, I decided to write my own and use it to figure out how to submit things to the Windows Store. The result was KOContour.