English Amiga Board - View Single Post - Comspec SA-1000 issues

mark_k · 30 December 2017, 17:02

Exec scans the region $F00000-$F7FFFF for residents though, wouldn't that pick up ComspecHD.device? (The installer disk does have ComspecHD.device and ComspecSCSI.device files in its devs directory.)

I'm pretty sure the ROM stays at $F00000 after passing control to Kickstart. The code which passes control to Kickstart doesn't do anything special (like copy instructions to RAM and call them, which the A1000 boot ROM has to do since it does go away on writing to $F80000), so it needs to remain present. See offset $3992 in the ROM disassembly.

30 December 2017, 17:02	#9
mark_k Registered User Join Date: Aug 2004 Location: Posts: 3,335	Exec scans the region $F00000-$F7FFFF for residents though, wouldn't that pick up ComspecHD.device? (The installer disk does have ComspecHD.device and ComspecSCSI.device files in its devs directory.) I'm pretty sure the ROM stays at $F00000 after passing control to Kickstart. The code which passes control to Kickstart doesn't do anything special (like copy instructions to RAM and call them, which the A1000 boot ROM has to do since it does go away on writing to $F80000), so it needs to remain present. See offset $3992 in the ROM disassembly. Last edited by mark_k; 30 December 2017 at 21:41.