[Coco] Trying to build new images

[Bill Pierce]

Ed, both rel and krn have special headers. Ironically, rel is not used after the system is relocated (hence "rel=relocator") and is loaded by DECB so it does not have a proper header. Krn has a some odd code at the beginning which disappears after relocation and the header is hidden behind that code. All 3, rel, boot, and krn are "filled" at the end to be a certain size to make the merged "kernel" a fixed size.
A lot of this was the premises of Brett's "CocoBoot" which did away with all this unneeded code (only needed while booting), which by the way is exactly how the bootrom for the Coco3FPGA works... it does away with rel & boot and replaces krn with ccbkrn which is loaded from the root dir.

 

 


Bill Pierce
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-----Original Message-----
From: Bill Gunshannon <bill.gunshannon at hotmail.com>
To: coco <coco at maltedmedia.com>
Sent: Wed, Jan 11, 2017 8:16 am
Subject: Re: [Coco] Trying to build new images

OK, next set of questions.Is rel a module or just a program?Why, you ask?I saved the file used to build the boot track and ran identagainst it.  rel is listed as not a module and krn gets a badheader message.Looking at the source for rel it appears to have everything init to be a module, but I'm no expert (yet!).Next, I tried to assemble rel.asm on my system.  It wouldn'tassemble.  Are the sources not in a format recognized by theNitrOS9 asm command?Would the bad header in krn cause it to not execute?Anybody want to hazard a guess why these programs appear to bebroken?  Or, are the results from ident bogus?Oh yeah, I tried running ident against rel and krn in other diskimages with the same results.bill-- Coco mailing listCoco at maltedmedia.comhttps://pairlist5.pair.net/mailman/listinfo/coco