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2019-12-19Added the B register, which is used for storing themrb0nk500
remainder during a DIV instruction. I also added the TAB, and TBA instructions, for transfering between the Accumulator, and the B register.
2019-12-18Start work on SuBAsm.mrb0nk500
Also added support for moving the cursor arround.
2019-12-17Revamped how the keyboard works.mrb0nk500
It now does not use an interrupt, although, in the emulator, it does act like an interrupt, when the keypoll macro is set to 0.
2019-12-14We now have keyboard support!!!mrb0nk500
I also added the WAI instruction, which puts the thread that executed it, into a catatonic stat, where it can't do anything, until an interrupt occurs. I will be starting work on GFsuX next. I also might start work on SuBAsm, the Sux Bootstrapping Assembler.
2019-12-13Added support for specifying the number of bytes asmrb0nk500
the suffix. I added this because BieHDC said the already existing notation glowed in the dark too much.
2019-12-11We can print to the Screen!!!!mrb0nk500
I also added the ASR instruction, for doing arithmetic shifts, and have added a hello world program.
2019-12-08Added support for resolving fixup labels.mrb0nk500
AKA, referencing a label before it has been declared yet.
2019-12-07Added support for labels to the assembly languagemrb0nk500
monitor. I also rewrote the fibonacci program to include lables.
2019-12-07Added six instructions for transfering datamrb0nk500
between the three main registers. These instructions are: TAY: Transfer Accumulator to Y. TAX: Transfer Accumulator to X. TYX: Transfer Y to X. TYA: Transfer Y to Accumulator. TXA: Transfer X to Accumulator. TXY: Transfer X to Y.
2019-12-06Delete opcode.c, since I added all the functionsmrb0nk500
from it into sux.c.
2019-12-06Finally got multithreading support working!!mrb0nk500
I have also added a program that computes the Fibonacci sequence that I wrote in Sux assembly.
2019-12-03Start optimizing the emulator.mrb0nk500
2019-12-02Added the ability to disable the prefix byte.mrb0nk500
Any instructions that either have a register size of 8 bits, use implied addressing, or branch can save a byte by disabling the prefix byte. It does this by checking if the first three bits are all set to 1. If true, then it will treat it as a prefix byte, otherwise, it will treat it as an opcode.
2019-11-30Start work on rev2 of Sux.mrb0nk500
Added a prefix byte to tell the CPU certain information such as, how many bytes to load into the registers, or what ISA extension we want to use. I also added an assembly language monitor, so that I don't have to write stuff in machine code.