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| documentations:devices:6809 [2014/04/10 19:53] – [Interrupts] pulkomandy | documentations:devices:6809 [2015/02/28 17:08] (current) – external edit 127.0.0.1 | ||
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| ===== Technical description ===== | ===== Technical description ===== | ||
| - | Registers: | + | ==== Registers |
| - | * A and B: two 8-bit accumulators, | + | |
| - | * X and Y: two index registers, used as memory pointers | + | |
| - | * U and S: user and system stacks | + | |
| - | * CC: condition flags register | + | |
| - | * DP: direct-page pointer | + | |
| ==== Instruction set and addressing modes ==== | ==== Instruction set and addressing modes ==== | ||
| This is already covered elsewhere on the internet. Do I need to repeat everything? | This is already covered elsewhere on the internet. Do I need to repeat everything? | ||
| - | * [[http://public.logica.com/~burgins/emulator/com/m6809.html]] - Opcode summary with number of cycles, hex encoding of instruction, | + | * [[http://techheap.packetizer.com/processors/6809/6809_instruction_set.html]] - Opcode summary with number of cycles, hex encoding of instruction, |
| * [[http:// | * [[http:// | ||
| + | * [[http:// | ||
| ====Interrupts==== | ====Interrupts==== | ||
| * Reset: at system reset. | * Reset: at system reset. | ||
| Line 33: | Line 34: | ||
| ===== Download ===== | ===== Download ===== | ||
| - | Datasheet, | + | * Complete |
| + | * {{: | ||
| + | * Datasheet | ||
