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| ====== 68080 Core ====== | ====== 68080 Core ====== | ||
| - | {{:apollo-01.png?nolink&128|}} | + | {{:crom_apollo-02.png?nolink&128|}} |
| ===== Overview ===== | ===== Overview ===== | ||
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| **68080** is a new CPU that is code-compatible with the **Motorola 68k** processors. | **68080** is a new CPU that is code-compatible with the **Motorola 68k** processors. | ||
| - | It is an affordable CPU for your classic Amigas (or Amiga compatibles) that is **much faster than the fastest 68060**. It is compatible with all CPUs and [[apollo_core:fpu|FPUs]] of the Motorola 68000 family. [(Few rare instructions are currently not supported.)] It is designed according to modern CPU standards, is fully written in **VHDL**, and is intended to run on [[https://www.intel.com/content/www/us/en/products/programmable/cyclone-series.html|Altera Cyclone FPGAs]]. | + | It is an affordable CPU for your classic Amigas (or Amiga compatibles) that is **much faster than the fastest 68060**. It is compatible with all CPUs and [[apollo_core:fpu|FPUs]] of the Motorola 68000 family. [(MMU-related instructions are currently not supported.)] It is designed according to modern CPU standards, is fully written in **VHDL**, and is intended to run on [[https://www.intel.com/content/www/us/en/products/programmable/cyclone-series.html|Altera Cyclone FPGAs]]. |
| **AmigaOS 3.x** currently recognizes this new CPU as a **68040**. | **AmigaOS 3.x** currently recognizes this new CPU as a **68040**. | ||
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| | Amiga 1200 | MK2 | 68060 | 66 MHz | 65 | ++++++++++++++++ | | | Amiga 1200 | MK2 | 68060 | 66 MHz | 65 | ++++++++++++++++ | | ||
| | Amiga 600 | Vampire 600 V2 | SILVER6 | x15 | 173 | +++++++++++++++++++++++++++++++++++++++++++ | | | Amiga 600 | Vampire 600 V2 | SILVER6 | x15 | 173 | +++++++++++++++++++++++++++++++++++++++++++ | | ||
| + | |||
| + | More detailed comparisons to an overclocked 68060 can be found [[http://www.apollo-core.com/knowledge.php?note=30521|here]]. | ||
| ---- | ---- | ||
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| ^ Feature ^ 68000 ^ 68020 ^ 68030 ^ 68040 ^ 68060 ^ 68080 ^ | ^ Feature ^ 68000 ^ 68020 ^ 68030 ^ 68040 ^ 68060 ^ 68080 ^ | ||
| - | | 68K ISA | X | X | X | X | X | X | | + | | 68k ISA | X | X | X | X | X | X | |
| | Extended EA-modes | | X | X | X | X | X | | | Extended EA-modes | | X | X | X | X | X | | ||
| | BitFields | | X | X | X | X | X | | | BitFields | | X | X | X | X | X | | ||
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| * [[.code_samples:|68080 asm code samples]] | * [[.code_samples:|68080 asm code samples]] | ||
| - | ^ Unsupported instructions ^ Notes ^ | + | 68080 lets you use EA as 1 source and to update 3rd registers - so normally not overwrite source registers. |
| - | | ''TAS2'' | Never used on AmigaOS | | + | |
| - | | ''MMU''-related | Not implemented | | + | |
| - | ---- | + | ''MMU''-related instructions are not supported. These are rarely used on AmigaOS. |
| - | ===== AMMX: New 64-bit instructions ===== | + | ==== AMMX: New 64-bit instructions ==== |
| These instructions are very similar to the ''SSE'' / ''AltiVec'' versions of them. | These instructions are very similar to the ''SSE'' / ''AltiVec'' versions of them. | ||
| - | |||
| - | 68080 lets you use EA as 1 source and to update 3rd registers - so normally not overwrite source registers. | ||
| * Quick Reference: [[http://www.apollo-core.com/AMMXQuickRef.pdf|PDF]] | * Quick Reference: [[http://www.apollo-core.com/AMMXQuickRef.pdf|PDF]] | ||
Last modified: le 2020/08/02 12:37
