diff --git a/Apple-IIe-Memory-Paging.md b/Apple-IIe-Memory-Paging.md
index fe5197d..b888cd2 100644
--- a/Apple-IIe-Memory-Paging.md
+++ b/Apple-IIe-Memory-Paging.md
@@ -24,7 +24,7 @@ Never mapped to RAM. Always contains the internal and card IO.
 Contains ROM if `RDCXROM` is set. Otherwise is unmapped, allowing cards to respond.
 
 # C300–C400
-Contains ROM if either of `RDCXROM` or `RDC3ROM` is set. Otherwise is unmapped, allowing cards to respond.
+Contains ROM if `RDCXROM` is set or `INTC3ROM` is reset. Otherwise is unmapped, allowing card 3 to respond.
 
 # D000–E000
 Reading: contains ROM if the language card `read` flip flop is *disabled*. Contains base RAM if the flip flop is enabled and `RAMRD` is reset. Otherwise contains auxiliary RAM.