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Thomson: support some SAP disk images.#1774

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TomHarte merged 4 commits intomasterfrom
SAP
Apr 20, 2026
Merged

Thomson: support some SAP disk images.#1774
TomHarte merged 4 commits intomasterfrom
SAP

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@TomHarte TomHarte commented Apr 20, 2026

Some titles now work, some don't; as with most of these Thomson formats the documentation is obscure even before the language barrier.

Some discussion in https://forum.system-cfg.com/viewtopic.php?f=6&t=15013&hilit=sap+crc&sid=6d054b10d3897a20e480c130987b1818 took me to https://github.com/Samuel-DEVULDER/Thomson-Projects/blob/97fab1b2aa2145473111bb4d63caebdc418b0a53/sapfs/libsap.c which might be useful further to read to understand the on-disk structure for Thomson's filing system but wasn't especially helpful when it came to verifying what might be afoot with weird disk images like Renegade's, which just opens with a bunch of sectors containing only 256 copies of the byte 0xe5.

@TomHarte TomHarte changed the title Thomson: support SAP disk images. Thomson: support some SAP disk images. Apr 20, 2026
@TomHarte TomHarte merged commit bb86695 into master Apr 20, 2026
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@TomHarte TomHarte deleted the SAP branch April 20, 2026 18:31
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