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test please delete
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Originally posted by voodooflux View PostJust burning that Windows 7 beta onto a DVD so I can install it for a laugh. I need to get out more don't I.Where are we going? And what’s with this hand basket?Comment
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Originally posted by TheFaQQer View PostLot 89 - GEORGIAN BISCUIT BARRELWhere are we going? And what’s with this hand basket?Comment
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Originally posted by TheFaQQer View PostLot 112 - 3 GLASS TOFFEE JARSWhere are we going? And what’s with this hand basket?Comment
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Originally posted by TheFaQQer View PostThat's the lot.Where are we going? And what’s with this hand basket?Comment
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Originally posted by TheFaQQer View PostAnd on that note, it's time to call it a day
I'm gonna head off soon and catch up on the last couple of Stargate Atlantis episodes before the last ever (*sniff*) episode on Tuesday.Where are we going? And what’s with this hand basket?Comment
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The Amstrad PC1512 (and PC1640) preserved registers across BIOS calls. This fact was clearly documented in the Amstrad Technical Reference Manual.
What wasn't clearly documented was that, in doing this, it differed from every other IBM PC (and compatible) BIOS except Compaq's.
As a result, when I was first writing games, we shipped a game to the publisher which, as part of initialising the display when the game started, would make a BIOS call with registers that had been modified by the previous BIOS call, with the result that it switched the CGA card from graphics to text mode, thereby totally buggering things up
I could only debug it by walking up to the Tandy shop and asking the salesman to let me check it on one of their display models. Furthermore, I had to make sure that the fix occupied the same number of bytes as the original code, for easy patching of the disks that had already been duplicated
It didn't take long to sort it out - I just replaced the BIOS-calling code with code that hit the hardware directly, went back to Tandy to check it, and shipped the patch.
On the bright side, the offending code had been written by another chap before I started at the company - I'd taken the project over when I was hiredComment
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