Andrew Collier

Andrew Collier

An implementation of the inflate decompression algorithm from RFC1951, as used by gzip and other compatible utilities. In other words, it’s like gunzip for the Sam.

SAMflate requires two consecutive pages as temporary storage. Load the code at an offset of 8k into the second of these pages (or in other words, at any multiple of 16384 bytes from the starting address in the image).

Then load your gz file somewhere else in memory, and simply
CALL samflate, gzdata, destination
where samflate is the address you loaded the samflate code, gzdata is the address you loaded your gzipped file, and destination is the address you would like it decoded to.

All three addresses are in BASIC’s format (i.e. 16384 is the start of page 0)

It’s usually OK for the end of the decoded data to overlap with the beginning of the gzipped data (but not the other way around!)

Quazar

Online service currently in development for use with the Trinity Ethernet Interface. For more information see issue 22 of SAM Revival magazine.

The late running issue 22 of SAM Revival is out now from Quazar

This issue of SAM Revival costs £3.99 for the UK, or £4.79 for EU including Airmail postage. You can also subscribe for six issues at a discounted price of £21.98 (UK) or £26.98 (EU). More information and ordering information can be found on the Quazar website at www.samcoupe.com

SAM Revival is a printed magazine with an accompanying cover disk of software and aims to be packed full of SAM Coupé news, interesting features, articles and interviews, catering for everything SAM related. The first issue launched in August 2002, and the magazine is now read by SAM users in 20 countries.