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apollo_core:start [2020/07/13 00:56] muaddib [68080 Core] |
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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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| * [[.code_samples:|68080 asm code samples]] | * [[.code_samples:|68080 asm code samples]] | ||
| - | Unsupported instructions: | + | 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: Rarely used on AmigaOS. | + | ''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
