At 05:53 PM 4/25/2004 +0400, Arkady V.Belousov wrote: >Hi! > >24-įŠŅ-2004 21:51 [EMAIL PROTECTED] (Michael Devore) wrote to >[EMAIL PROTECTED]: > >>>I thought "ram" by itself meant dynamic EMS allocation as opposed to >>>allocating a fixed amount (at least, this is what the docs day), that's >>>how I use "ram" in M$ EMM386. >MD> It's not documented that way on any EMM386 docs I see, including >MD> Microsoft's. It wouldn't matter, because we don't support that type of >MD> behavior anyway. > >______________O\_/_________________________________\_/O______________ >Sharing XMS and EMS memory > >EMM386 provides EMS/VCPI memory for programs that require it by converting >XMS memory to EMS/VCPI memory. When it is loaded, EMM386 reserves the amount >of memory specified by the MIN switch for use as EMS/VCPI memory (the >default value is 256K). Once this amount of XMS memory is reserved, it is >always available as EMS/VCPI memory and no longer available as XMS memory. >EMM386 may be able to convert additional amounts of XMS memory to EMS/VCPI >memory, up to the amount specified by the MEMORY parameter. EMM386 returns >the additional amount back to XMS memory when it is no longer needed as >EMS/VCPI memory.
That paragraph is only true starting with EMM386 version 4.45, which is introduced with MS-DOS 6.0. There is Microsoft documentation on that EMM386 change, but I'll not re-post the full paragraph. We are MS-DOS 5.0+ compatible, at least as far as general EMS and XMS abilities. Pool sharing previously has been discussed here as a post-1.0 change. The quoted topic is unrelated to the EMM386 RAM option. It has to do with how EMS and XMS memory is allocated from a common extended memory pool. It relates to the (unsupported) MIN and (FreeDOS) EMM= option. To save you time from re-typing doc and spec quotes, you can assume I have access to the EMS 4.0 spec, the DPMI 0.9/1.0 spec, the XMS 3.0 spec, the VCPI 1.0 spec, and the Microsoft HIMEM and EMM386 publicly-disclosed option documentation. ------------------------------------------------------- This SF.net email is sponsored by: The Robotic Monkeys at ThinkGeek For a limited time only, get FREE Ground shipping on all orders of $35 or more. Hurry up and shop folks, this offer expires April 30th! http://www.thinkgeek.com/freeshipping/?cpg297 _______________________________________________ Freedos-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/freedos-devel
