diff --git a/cp437/README.md b/cp437/README.md
index 5b08b0e..52c912e 100644
--- a/cp437/README.md
+++ b/cp437/README.md
@@ -14,4 +14,4 @@ Building
 This tool is automatically built as needed by the build scripts for other tools. Alternatively:
 
 * **Windows:** Run `build.bat` from an OpenWatcom "Build Environment" command prompt.
-* **Linux:** Run `./build.sh` with OpenWatcom on `$PATH`.
+* **Linux:** Run `./build.sh` with OpenWatcom tools present on `$PATH`.
diff --git a/pcireg/README.md b/pcireg/README.md
index 49323c2..fe9c7a7 100644
--- a/pcireg/README.md
+++ b/pcireg/README.md
@@ -8,8 +8,8 @@ Usage
 PCIREG -s [-d]
 ∟ Display all devices on the PCI bus. Specify -d to dump registers as well.
 
-PCIREG -i
-∟ Display BIOS IRQ steering table.
+PCIREG -i [-8]
+∟ Display BIOS IRQ steering table. Specify -8 to display as 86Box code.
 
 PCIREG -r [bus] device [function] register
 ∟ Read the given register
@@ -29,4 +29,4 @@ Register dumps are saved to PCIbbddf.BIN where bb=bus, dd=device, f=function.
 Building
 --------
 * **Windows:** Run `build.bat` from an OpenWatcom "Build Environment" command prompt.
-* **Linux:** Run `./build.sh` with OpenWatcom on `$PATH`.
+* **Linux:** Run `./build.sh` with OpenWatcom tools present in `$PATH`.