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Message-ID: | <33DBB874.57DF@polbox.com> |
Date: | Sun, 27 Jul 1997 23:07:00 +0200 |
From: | Tomasz Chojnacki <tcho AT polbox DOT com> |
Reply-To: | tcho AT polbox DOT com |
MIME-Version: | 1.0 |
To: | Nate Eldredge <eldredge AT ap DOT net> |
CC: | djgpp AT delorie DOT com |
Subject: | Re: Mem mapped device questions |
References: | <199707261600 DOT JAA29611 AT adit DOT ap DOT net> |
Nate Eldredge wrote: > >You wrote: > >I am working with the PC frame-grabber board under DJGPP v1 > >(gcc v2.6.3). > > Off the subject: You really should upgrade. 2.01 is the current version and > it's much better! I think the access to memory mapped devices is more simple in DJGPP v1. I can simply use 0xE0000000 linear address instead of manipulating __dpmi_physical_address_mapping and other DPMI functions. I understand that DJGPP v2 is DPMI only environment and such mapping is not possible but I have question: Is the access to memory mapped device limited only by that hardware or by the compiler also - that is: should the access to memory mapped device be faster/slower or the same comparing DJGPP v1 and DJGPP v2. Thank you ! ---------------- Tomasz Chojnacki tcho AT polbox DOT com ---------------- P.S. I am sorry for my bad English
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