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- From: psteffn@hal.gnu.ai.mit.edu (Paul Steffen)
- Newsgroups: comp.sys.atari.st
- Subject: Re: The compatibility story (Falcon & A1200)
- Message-ID: <1ivr6qINNqjp@life.ai.mit.edu>
- Date: 13 Jan 93 01:27:54 GMT
- References: <1993Jan11.120754@cs.bham.ac.uk> <1itud1INNg96@life.ai.mit.edu> <1993Jan12.180221.507@news.uit.no>
- Organization: /etc/organization
- Lines: 49
- NNTP-Posting-Host: hal.gnu.ai.mit.edu
-
- In article <1993Jan12.180221.507@news.uit.no> borgen@stud.cs.uit.no (Boerge Noest) writes:
- >In article <1itud1INNg96@life.ai.mit.edu> psteffn@hal.gnu.ai.mit.edu (Paul Steffen) writes:
- >>There is no way to disable the new AA [AGA] functions in the 1200.
- >
- >Say what?
- >You can chose OCS, ECS, (or best) (O=old,E=Enhanced) to make old software
- >work if it craps on the new registers.
-
-
- Is this done at the hardware level?? Meaning if I select OCS at bootup
- and set bit 6 of bplcon0, would the Amiga <STILL> kick into SuperHires
- mode? I don't own an A1200 so I don't know.
-
-
- >
- >> Software
- >>that changes the wrong bit in the bitplane control registers can still cause
- >>problems. It's ironic, though, that Commodore threatens never to release
- >>another hardware manual, though. They want people to program "cleanly" but
- >>this be counterproductive.
- >
- >I think it is very wise of C=. Then there will not be any way for
- >programmers to crash when the chips are upgraded. Of course, this depends
- >on good (and fast) support from the OS.
-
- It doesn't matter whether the hardware manual is published or not, people
- will still get the information by disassembling the libraries. You know
- this! Isn't it smarter for the information to come from Commodore?
- Whether Commodore or Abacus publishes the definitive hardware reference
- manual, it's completely up to Commodore.
-
- Personally, I have a better idea of how Commodore should upgrade the
- Amiga's video hardware next time.. LEAVE IT AS IT IS!! Create a completely
- new set of custom chip registers and modes independant of the old design.
- The original chipset architecture is practically topped out with the new
- AGA modes so why bother? The design of the AGA is roughly akin to Intel
- 32-bit architecture in that the same basic design was updated. It seems
- to work for the Falcon, anyway.
-
- >
- >>> | David Oakley, ASTRAsoft shareware producers. |\
- >--
- >|/// borgen@stud.cs.uit.no (Boerge Noest) | Amiga B2000 \\\|
- >|// Box 218, 9001 Tromsoe, Norway | Remember to :-) when needed \\|
- >|/ The worlds northernmost university | Life is worth living. \|
- >#Disclaimer: This university and me does not agree.
-
- Paul Steffen
- STratoHAK/Tibetan Peach Pie Inc..
-