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=== Limitations === | === Limitations === | ||
Due to the fact the VMU features a built-in BIOS handling OS-specific tasks, the documentation is lacking in a few low-level places, such as hidden instructions and internal SFRs. These are areas that should not concern a typical application developer | Due to the fact the VMU features a built-in BIOS handling OS-specific tasks, the documentation is lacking in a few low-level places, such as hidden instructions and internal SFRs. These are areas that should not concern a typical application developer but are crucial for emulation. | ||
=== Errors === | === Errors === | ||
There are also many places with typos, where a register bit is referenced as being "set to 0" and "reset to 0," when it should say "set to 1" or "reset to 0." | * The first example for the DIV instruction stores the wrong value in the accumulator. It should be 0x79 instead of 0x78. | ||
* There are also many places with typos, where a register bit is referenced as being "set to 0" and "reset to 0," when it should say "set to 1" or "reset to 0." | |||
* The Instruction Code for LD d9 on page VMC-186 is incorrect. | |||
Latest revision as of 15:53, 29 January 2023
Summary
Official application developer's manual for the Visual Memory Unit.
- Tutorial Manual
- Specifications
- Hardware Manual
- Programing Manual
- VMU-BIOS Specifications
- Sound Development Specifications
- Simulator Manual
Limitations
Due to the fact the VMU features a built-in BIOS handling OS-specific tasks, the documentation is lacking in a few low-level places, such as hidden instructions and internal SFRs. These are areas that should not concern a typical application developer but are crucial for emulation.
Errors
- The first example for the DIV instruction stores the wrong value in the accumulator. It should be 0x79 instead of 0x78.
- There are also many places with typos, where a register bit is referenced as being "set to 0" and "reset to 0," when it should say "set to 1" or "reset to 0."
- The Instruction Code for LD d9 on page VMC-186 is incorrect.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 19:55, 10 January 2020 | (39.68 MB) | Darc (talk | contribs) | Dreamcast (VMU)Visual Memory Unit Tutorial Manual Specifications Hardware Manual Programing Manual VMU-BIOS Specifications Sound Development Specifications Simulator Manual |
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