Difference between revisions of "Debug device"
From MSX Game Library
| Line 20: | Line 20: | ||
7 6 5 4 3 2 1 0 | 7 6 5 4 3 2 1 0 | ||
│ │ │ │ │ │ │ └── Hexadecimal mode (0 = OFF, 1 = ON) | │ │ │ │ │ │ │ └── Hexadecimal mode (0 = OFF, 1 = ON) | ||
| − | + | 0 ? 0 1 │ │ └────── Binary mode (0 = OFF, 1 = ON) | |
| − | + | │ └────────── Decimal mode (0 = OFF, 1 = ON) | |
| − | + | └────────────── ASCII mode (0 = OFF, 1 = ON) | |
----------------------------------------------------------------------------- | ----------------------------------------------------------------------------- | ||
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7 6 5 4 3 2 1 0 | 7 6 5 4 3 2 1 0 | ||
│ │ │ │ │ │ └───┴── Mode (0 = hex, 1 = binary, 2 = decimal, 3 = ASCII mode) | │ │ │ │ │ │ └───┴── Mode (0 = hex, 1 = binary, 2 = decimal, 3 = ASCII mode) | ||
| − | + | 0 ? 1 1 │ └────────── <b>Data width (0 = 8 bits; 1 = 16 bits)</b> | |
| − | + | └────────────── <b>Signed (0 = unsigned, 1 = signed)</b> | |
----------------------------------------------------------------------------- | ----------------------------------------------------------------------------- | ||
Revision as of 18:48, 27 July 2023
Proposal to improve the debugging protocol used by openMSX pseudo-device.
Based on: https://openmsx.org/manual/user.html#debugdevice
Debug device protocol
The additions are in bold.
-----------------------------------------------------------------------------
Port 0x2E - Mode Set Register
-----------------------------------------------------------------------------
7 6 5 4 3 2 1 0
│ │ │ │ └───┴───┴───┴── Mode-specific parameters
│ │ └───┴────────────────── Output mode (0 = OFF, 1 = single byte, 2 = multi byte)
│ └────────────────────────── Line feed mode (0 = line feed at mode change, 1 = no line feed)
└────────────────────────────── Functionality (0 = output, 1 = command)
-----------------------------------------------------------------------------
Functionality = output, Output mode = single byte
-----------------------------------------------------------------------------
7 6 5 4 3 2 1 0
│ │ │ │ │ │ │ └── Hexadecimal mode (0 = OFF, 1 = ON)
0 ? 0 1 │ │ └────── Binary mode (0 = OFF, 1 = ON)
│ └────────── Decimal mode (0 = OFF, 1 = ON)
└────────────── ASCII mode (0 = OFF, 1 = ON)
-----------------------------------------------------------------------------
Functionality = output, Output mode = multi byte
-----------------------------------------------------------------------------
7 6 5 4 3 2 1 0
│ │ │ │ │ │ └───┴── Mode (0 = hex, 1 = binary, 2 = decimal, 3 = ASCII mode)
0 ? 1 1 │ └────────── Data width (0 = 8 bits; 1 = 16 bits)
└────────────── Signed (0 = unsigned, 1 = signed)
-----------------------------------------------------------------------------
Functionality = command
-----------------------------------------------------------------------------
7 6 5 4 3 2 1 0
│ └───┴───┴───┴───┴───┴───┴── Command ID (0x7F = break point)
1