# QUATFUCK
numbers in base 4 + 4 (named I4)
each line is a memory address, you can use space to improve readability.
ascii are converted to ASC4 and put in memory
memory 64k [4-77777777]
memory content is filled with random numbers at the start
### ARITHMETIC
0,1,2,3 - put 0,1,2,3 in memory
(constant negative numbers, 0 is 0)
negative numbers start with 1|2|3
positives numbers starts with 4|5|6|7
All the math operations are applied to the numbers as decimals. Then, the result is "normalised" to I4.
WIP: Could be the "un-normalised" version useful? Numbers with (8,9) could be something like "exceptional" numbers.
Exceptional numbers live only in the registries as a result of operations. They cannot be stored as it is in memory.
WIP: Could be the "half-normalised" number useful? This removes the sign, normalizing only the lower part (1,2,3).
### COMMANDS
N.B. Numbers or memory locations are written in little-endian format!
!@#$ - write in 4 registers resp.
[n]m - repeat m times n
> - increment by 1d a register
< - decrement by 1d a register
>n - copy R3 value in n
<n - copy (n) in R3
\ - swap adjacent registers
\ - conditional (-+=) jump: resp. less than 0, more than 0, equal to 0
/ - jump [memory address in I4 little endian] (unconditional)
/ - divide the supplied register by 4 and normalise the result
N.B.: the normalised result converges/oscillates to/around a couple of values after a specific amount of passes.
TODO: understand if there is an algorithm to identify the number of passes!!!
/' - integer I4 divide (R0/memory location) - R0 get remainder and R1 get quotient
. - print the memory content or registry
, - print the ASC4 value on the screen
} - rotate 1 pos right
{ - rotate 1 pos left
+ - add to registry memory content. store result in the registry.
- - sub to registry memory content. store result in the registry.
~ - randomise! generate an I4 positive number, using as a seed a number (read as a decimal) in memory (a random number).
You don't need to do that... but it could be useful someday.
` - stop/end/halt - performs a dump of the first 128 locations of memory. Numbers are displayed in big-endian format.
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ASC4
A - 654 B - 444 C - 476
D - 655 E - 445 F - 477
G - 656 H - 446 I - 544
J - 657 K - 447 L - 545
M - 664 N - 454 O - 546
P - 665 Q - 455 R - 547
S - 666 T - 456 U - 554
V - 667 X - 457 Y - 555
W - 674 Z - 464 ![¡] - 556
? - 675 .[…] - 465 ,[∞] - 557
$[¢] - 676 % - 466 /[|] - 564
* - 677 ( - 467 ) - 565
: - 744 ; - 474 [ - 566
] - 745 {[•] - 475 }[·] - 567
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