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Add a little pin documentation to the 6809 processor.

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Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
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Adrian Conlon 2018-08-26 19:02:41 +01:00
parent dc6803a5b6
commit 50826d36b6
1 changed files with 11 additions and 0 deletions
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11
MC6809/inc/mc6809.h
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@ -77,6 +77,17 @@ namespace EightBit {
PinLevel& NMI() { return m_nmiLine; } // In
PinLevel& FIRQ() { return m_firqLine; } // In
// |---------------|-----------------------------------|
// | MPU State | |
// |_______________| MPU State Definition |
// | BA | BS | |
// |_______|_______|___________________________________|
// | 0 | 0 | Normal (running) |
// | 0 | 1 | Interrupt or RESET Acknowledge |
// | 1 | 0 | SYNC Acknowledge |
// | 1 | 1 | HALT Acknowledge |
// |-------|-------|-----------------------------------|
PinLevel& BA() { return m_baLine; } // Out
PinLevel& BS() { return m_bsLine; } // Out