[fpc-other] Original Version of Photoshop Was Written in Pascal; Source Released

[Ralf Quint]

On 5/25/2018 12:34 AM, Mark Morgan Lloyd wrote:
>
> I agree. The major intersection of UCSD Pascal and MS was that they 
> could frequently be seen on the same Apple II system... MS made a Z80 
> card that allowed you to run CP/M-80, and it was very common to boot 
> into one or the other. The P-System was actually a fairly late arrival 
> for the PC and typically had a custom filesystem, while MS Pascal was 
> "just another language" under DOS etc.
>
I don't recall Microsoft having any Pascal compiler for CP/M, the first 
version that I am aware (3.x) was already on PC/MS-DOS.

What those Z80 cards had in common with being used by people running 
Apple (UCSD) Pascal was that they were compatible to Apple's "Language 
Card" (slot 0) 
(http://www.computinghistory.org.uk/det/42325/Apple-II-language-Card/) 
which had a replacement boot ROM and an additional 16KB of RAM, to allow 
the whole 64KB address space of the 6502 to be used. The most common 
Pascal on (Apple II) CP/M was at first probably Digitial Research's 
Pascal MT+, which was then also released as a PC/MS-DOS version for x86 
as Pascal MT+ 86. There was also JRT Pascal, bad that was pretty bad, 
but all of those faded into oblivion once the first version of Turbo 
Pascal was released on CP/M, before the one for PC/MS-DOS...

(http://www.z80.eu/pas-compiler.html)

And UCSD Pascal did not "arrive late for the PC", it was among the 
offerings from IBM right from the start, but just like CP/M-86, it was 
just priced WAAAAYYY above PC-DOS, so very few people were actually 
using it, unless they had already significant exposure to it on the 
Apple II or devices like Sage or Cromemco back in the days before the 
IBM-PC.

Ralf




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