Subj : Re: RP2350 and Pico 2 - things missing
To   : Brian Gregory
From : The Natural Philosopher
Date : Thu Aug 22 2024 09:17:19

On 21/08/2024 23:43, Brian Gregory wrote:
> On 17/08/2024 08:22, Lawrence D'Oliveiro wrote:
>> Or, you could bring back the old PDP-8 trick, of having the jump address
>> be in the *current page*. That means the upper bits are taken from the
>> current program counter.
>
> That must be damn annoying to program in assembler.
> Probably slows compilers down a fair but too.
>

IIRC 8086 was the same for conditional jumps.

In fact the whole small model thing was coding for a 64k page.

There were a few instructions that worked across pages...but my memory
is dim.


--
"When a true genius appears in the world, you may know him by this sign,
that the dunces are all in confederacy against him."

Jonathan Swift.

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