[Web] My Pegasos / MorphOS review | ANN.lu |
Posted on 21-Jun-2003 02:25 GMT by Christophe Decanini | 58 comments View flat View list |
It has been two and half a month since I bought my Pegasos.
I used it almost every day and wrote a review that you can find
here.
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My Pegasos / MorphOS review : Comment 26 of 58 | ANN.lu |
Posted by corpse on 21-Jun-2003 18:09 GMT | In reply to Comment 20 (Kjetil): "Guess you know nothing about computers to write this, chipsets are there to control hardware, even new PC's have custom hardware, gfx card has GPU, the ATA has DMA, I can continue and less about all the chips in PC that controls firewrite or USB, every computer need chipset to have efficiency need for communication, video and disk access."
PC chip-sets where a combination of the various bits of logic that made up the glue between the CPU, the memory , I/O etc and the basic on-board hardware e.g. RTC, Keyboard controller, UARTS etc in an AT. Modern chip-sets aren't that different but support newer,bigger,faster(TM)
"In the old days programs where written to access the gfx card directly,"
In the real mode you would use BIOS VESA etc services to program the graphics controller unless you were coding for a particular card. Once you've moved into an OS you could use either the functions it provides or BIOS services if they still work.
"I do expect them to be remove now that we live in DOS free world,"
You'd be surprised how many still use DOS based windows systems or legacy DOS based applications for their businesses.
"this days we no need to access the chips directly,"
There are still reasons to bang the hardware, for instance: if you want to control devices from a IBM/PC serial port using the OS can be very slow and BIOS services aren't much better because they have to take into consideration the various different UARTs out there.
"way do I use PC as an example for Amiga custom chips well PC has always hard custom chips,"
Original PC's were made up of huge arrays of TTL logic circuits, integration of these into chip-sets came later.
"in the old days they where not so advanced as the Amiga used at the time"
PC chip-sets have to be compatiable with the original AT's to some extent, for example I think in most cases you're still required to open the A20 gate in real-mode to be able to address the upper memory regions.
The Classic Amiga's have never needed to be AT compatible and thus have been able to integrate spankingly good graphics hardware, sound etc focused towards multimedia applications never seen on a IBM/PC. That sort of integration was great in the day when it was expensive to produce even the barebones AT clones but to design and produce something akin to the Classic Amiga chipset today would be expensive and surpassed by the time it hit the shops. |
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