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| author | alekseiplusplus <alekseijeaves@protonmail.com> | 2023-04-28 16:04:35 +1000 |
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| committer | alekseiplusplus <alekseijeaves@protonmail.com> | 2023-04-28 16:04:35 +1000 |
| commit | 1c30dea63b65c7e117b3fd8ba0140dbf77a0ef73 (patch) | |
| tree | 550e05feeace48ff4da53726d306df7b2389d7b7 /interpreter.md | |
| parent | eae92c43e1397d05a01050cc6fdb71c000eb22bb (diff) | |
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| -rw-r--r-- | interpreter.md | 57 |
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diff --git a/interpreter.md b/interpreter.md deleted file mode 100644 index 54a6c2a..0000000 --- a/interpreter.md +++ /dev/null @@ -1,57 +0,0 @@ -# interpreter - -This is a small program intended to help with testing the 6502 CPU, or running programs on it. - -The expected input is machine code written in plaintext. - -The program assumes you will write statements correctly so it doesn't waste time checking that you put four digits in instead of three. If you are using this I assume you know what you are doing. - -The program accepts stdin, so it can be used in two ways. -- Typing instructions inline. -- Piping a file in with cat. - -## Instructions - -To express the syntax of instructions, here are some valid examples to express LDA $01: - - a901 - A901 - A9 01 - -If you downloaded my project on Github, I have included a PDF called `opcodes_reference.pdf` which has a table with every legal opcode in it. - -Statements can be seperated or on a single line. For instance, - - a901 - p - q - -Can be written as - - a901pq - -The only case in which this should be avoided is after an M/m command. - -## Debug Commands - -The interpreter comes with multiple statements for the purpose of debugging the emulator. - -`Q/q` Quits the program. -Will cause segfault at end of file if not used. - -`R/r` Resets the virtual computer. - -`P/p` Dumps processor state. - -`M/m` Prints out memory. -There are two forms which memory can be printed. -The first is `sXX` where `XX` is a memory page. The whole page of memory is printed onto the screen. -The second is `sXXXX` where `XXXX` is a specific address. This prints out the value of the 1 byte requested. -Be aware that unallocated memory will be dumped if it happens to be accessed with this command. Also be aware that there should be a newline directly after this command. - -`S/s` Directly set a piece of memory. -Syntax is strictly of form `sXXXX.xx` where `XXXX` is the address and `xx` is the value. - -`/` Prints until newline. - -`#` Ignores until newline.
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