mos6551: RTS high disables transmitter, but not in the middle of a character

ajrhacker · ajrhacker · commit 6871bdd71ea5 · 2025-12-06T18:05:43.000-05:00
diff --git a/src/devices/machine/mos6551.cpp b/src/devices/machine/mos6551.cpp
@@ -730,7 +730,7 @@ void mos6551_device::transmitter_clock(int state)
 				m_tx_bits = 0;
 				m_tx_parity = 0;
 
-				if (m_cts)
+				if (m_cts || m_rts)
 				{
 					m_tx_output = OUTPUT_MARK;
 				}

Original file line number	Diff line number	Diff line change
`@@ -730,7 +730,7 @@ void mos6551_device::transmitter_clock(int state)`
`730`	`730`	`m_tx_bits = 0;`
`731`	`731`	`m_tx_parity = 0;`
`732`	`732`
`733`		`- if (m_cts)`
	`733`	`+ if (m_cts \|\| m_rts)`
`734`	`734`	`{`
`735`	`735`	`m_tx_output = OUTPUT_MARK;`
`736`	`736`	`}`