Comment by flohofwoe
1 year ago
On 8-bit home computer CPUs like the 6502 or Z80, high level programming languages like C simply were not an option, you left too much performance on the table (not to mention BASIC which was easily 100x slower than handwritten assembly).
Forth was quite acceptable performance wise, but that's barely above a good macro assembler.
And after the 8-bitters, assembly coding on the Amiga was pure pleasure - also for large programs, since apart from the great 68k ISA the entire Amiga hardware and operating system was written to make assembly coding convenient (and even though C was much better on the 68k, most serious programs used a mix of C and assembly).
(also, while writing assembly code today isn't all that important, reading assembly code definitely is when looking at compiler output and trying to figure out why and how the compiler butchered my high level code).
> (also, while writing assembly code today isn't all that important, reading assembly code definitely is when looking at compiler output and trying to figure out why and how the compiler butchered my high level code).
Agreed - I wouldn't be able to write any x86 assembly without a bit of help, but having done some game reverse engineering I've learned enough to make sense of compiler generated code.
To add to that, there is a reason why even all modern JITs also have ways to look into generated code.
Anyone curious how their JVM, CLR, V8, ART, Julia,.... gets massaged into machine code only needs to learn about the related tools on the ecosystem.
Some of them are available on online playgrounds like Compiler Explorer, Sharpio,....
> the entire Amiga hardware and operating system was written to make assembly coding convenient
I am curious what specific examples do you have of the HW and OS being made/written to make ASM convenient?
The hardware could be controlled via memory mapped 16-bit registers, e.g. checking whether the left mouse button is down is a single instruction:
The OS used a simple assembly-friendly calling convention, parameters were passed in registers instead of the stack (and the API documentation mentioned which parameters are expected in which registers), and the reference manuals usually had both C and assembly examples, etc... basically lots of little things to make the lives of assembly coders easier.
This YouTube playlist gives a nice overview of assembly coding on the Amiga (mostly via direct hardware access though): https://www.youtube.com/playlist?list=PLc3ltHgmiidpK-s0eP5hT...
Also, using a 68000 instead of a shitty Intel processor was a huge boon to assembly programming. Ultimately Intel won in the market and eventually even shipped processors that weren't profoundly unpleasant at the assembly level, but the 68000 is still a much more pleasant architecture for the assembly programmer. ARM is nicer still, but this was before ARM's existence as a separate company from Acorn.