The original book presenting the disassembly was: https://www.abebooks.co.uk/9780861611164/Complete-Spectrum-ROM-Disassembly-Logan-0861611160/plp https://www.a

The original book presenting the disassembly was: https://www.abebooks.co.uk/9780861611164/Complete-Spectrum-ROM-Disassembly-Logan-0861611160/plp https://www.abebooks.co.uk/9780861611164/Complete-Spectrum-R... by Dr Ian Logan and Dr Frank O'Hara, 1983 published by Melbourne House, here is the scan of their catalog from these times: http://www.ourdigitalheritage.org/archive/playitagain/wp-content/uploads/melbourne-catalog.pdf http://www.ourdigitalheritage.org/archive/playitagain/wp-con... I see in the changelog of this project: https://speccy.xyz/rom/reference/changelog.html https://speccy.xyz/rom/reference/changelog.html "20160709 The disassembly is now 'complete'. - Added annotations from The Complete Spectrum ROM Disassembly by Dr Ian Logan and Dr Frank O'Hara" The interesting aspect of this online version is its relation to https://skoolkit.ca/ https://skoolkit.ca/ https://skoolkit.ca/docs/skoolkit/whatis.html https://skoolkit.ca/docs/skoolkit/whatis.html