- 6502 EMULATOR STACK OVERFLOW UPDATE
- 6502 EMULATOR STACK OVERFLOW FULL
- 6502 EMULATOR STACK OVERFLOW CODE
- 6502 EMULATOR STACK OVERFLOW PC
- 6502 EMULATOR STACK OVERFLOW SERIES
Undocumented instructions, AKA "illegal opcodes", are supported and will be listed with an asterisk prefix by the following mnemonics (common synonyms in parentheses): *ALR (ASR)Ī reset will be required, once the CPU encounters a " JAM" instruction. (Mind that you can temporarily disable/enable ROM by calling " cpu6502.enableROM()" from the browser's JavaScript console.) Illegal Opcodes Officially, the instruction was not yet implemented.) (With this infamous bug of the early 6502 production series, the ROR instruction behaves like ASL, but shifts in zero and preserves the carry flag.
6502 EMULATOR STACK OVERFLOW SERIES
The option "emulate pre-June 1976 series ROR bug" found below the KIM-1 ROM entry may be also used without this ROM. Note: the KIM-1 (© CBM) consits only of the main ROM and doesen't comprise the cassette extension. However, you can still write to the underlaying Quot shadow" RAM. ROMs will be loaded in a write-protected area of their own. Loading ROMsįor those who can't help nostalgia, there are a few ROM sets ready to load.
You may specify a byte value to be used as a fill byte (e.g., " EA", NOP, as used by the C64) in the confirmation prompt. Use the button "clear meory" to reset the memory.
6502 EMULATOR STACK OVERFLOW UPDATE
6502 EMULATOR STACK OVERFLOW CODE
6502 EMULATOR STACK OVERFLOW FULL
The emulator implements 64K of memory for the full 16-bit address range. Interrupts (on execution of a BRK instruction, code 00) will always trigger a trap. These observers may by activated/deactivated both individually and globally. Traps may observe the value of any of the 3 main registers (AC, XR, YR), watch for an under- or overflow of the stack register (SR), or monitor for the program counter (PC) by setting a breakpoints. You may set any number of traps or breakpoints, which will be monitored in continuous run mode.
6502 EMULATOR STACK OVERFLOW PC
This display shows all (yes its all there is) registers of a 6502/6510 CPU: PC Observe the tool-tips of any options for further information or read the description below. Using the file upload button or drag-and-drop, files may be text files containg a similar hex dump or binary files. Any heading line numbers or addresses preceded or followed by a colon (" :") are ignored, as are any comments (starting with a semicolon or a backslash).
The object code may be a series of byte values in hex format (in pairs of two or separated by white space and/or commas).