SkoolKit is a collection of utilities that can be used to disassemble a Spectrum game (or indeed any piece of Spectrum software written in machine code) into a format known as a skool file. Then, from this skool file, you can use SkoolKit to create a browsable disassembly in HTML format, or a re-assemblable disassembly in ASM format. So the skool file is - from start to finish as you develop it by organising and annotating the code - the common 'source' for both the reader-friendly HTML version of the disassembly, and the developer- and assembler-friendly ASM version of the disassembly.

SkoolKit requires Python 3.5+. If you're running Linux or one of the BSDs, you probably already have Python installed. If you're running Windows or Mac OS X, you can get Python here.

With SkoolKit you can:

• use sna2ctl.py to generate a control file (an attempt to identify routines and data blocks by static analysis) from a snapshot (SNA, SZX or Z80) or raw memory file
• enable sna2ctl.py to generate a much better control file that more reliably distinguishes code from data by using a code execution map produced by an emulator
• use sna2skool.py along with this control file to produce a disassembly of a snapshot or raw memory file
• add annotations to this disassembly (or the control file) as you discover the purpose of each routine and data block
• use skool2html.py to convert a disassembly into a bunch of HTML files (with annotations in place, and the operands of CALL and JP instructions converted into hyperlinks)
• use skool2asm.py to convert a disassembly into an assembler source file (also with annotations in place)
• use skool2ctl.py to convert a disassembly back into a control file (with annotations retained)
• use skool2bin.py to convert a disassembly into a raw memory file
• use tap2sna.py to convert a TAP or TZX file into a 'pristine' Z80 snapshot
• use snapinfo.py to analyse a snapshot or raw memory file and list the BASIC program it contains, show register values, produce a call graph, find tile graphic data, find text, or find sequences of arbitrary byte values
• use tapinfo.py to analyse the blocks in a TAP or TZX file, and list the BASIC program it contains
• use bin2tap.py to convert a snapshot or raw memory file into a TAP file
• use bin2sna.py to convert a raw memory file into a Z80 snapshot
• use snapmod.py to modify the register values or memory contents in a Z80 snapshot
• use sna2img.py to convert graphic data in a disassembly, SCR file, snapshot or raw memory file into a PNG image

In an HTML disassembly produced by skool2html.py you can also:

• use the #UDG, #UDGARRAY, #FONT and #SCR macros to build still and animated PNG images from graphic data
• use the #R macro in annotations to create hyperlinks between routines and data blocks that refer to each other
• use [Bug:*], [Fact:*] and [Poke:*] sections in a ref file to neatly render lists of bugs, trivia and POKEs on separate pages

See the user manual for more details (mirror here).