commit 3a38b86e1e4eab4a8dd6346b8d9516a36a189394
parent 1dbe229529788a40d076153c6ac81421b26a63f3
Author: Luxferre <lux@ferre>
Date: Thu, 11 May 2023 17:34:14 +0300
fx rdm
Diffstat:
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/README.md b/README.md
@@ -34,7 +34,9 @@ sh dale8a.sh prog.ch8
You can also run the AWK file itself directly as follows:
+```
LANG=C awk -f tgl.awk -f dale8a.awk [params] -- prog.ch8
+```
If the ROM file has `.l.ch8` extension, additional `LSQ` emulation quirk will be applied (see below). If the file has `.s.ch8` extention, additional `STQ` emulation quirk will be applied (see below). Is the file has `.sl.ch8` or `.ls.ch8` extension, both quirks will be applied.
@@ -92,9 +94,9 @@ Opcode | Assembly instruction | Meaning | Notes
6xkk | LD Vx, byte | Set Vx = byte |
7xkk | ADD Vx, byte | Set Vx = Vx + byte |
8xy0 | LD Vx, Vy | Set Vx = Vy |
-8xy1 | OR Vx, Vy | Set Vx = Vx OR Vy | Bitwise OR | If `VIP` quirk is **on**, also clear the VF register
-8xy2 | AND Vx, Vy | Set Vx = Vx AND Vy | Bitwise AND | If `VIP` quirk is **on**, also clear the VF register
-8xy3 | XOR Vx, Vy | Set Vx = Vx XOR Vy | Bitwise XOR | If `VIP` quirk is **on**, also clear the VF register
+8xy1 | OR Vx, Vy | Set Vx = Vx OR Vy | Bitwise OR. If `VIP` quirk is **on**, also clear the VF register
+8xy2 | AND Vx, Vy | Set Vx = Vx AND Vy | Bitwise AND. If `VIP` quirk is **on**, also clear the VF register
+8xy3 | XOR Vx, Vy | Set Vx = Vx XOR Vy | Bitwise XOR. If `VIP` quirk is **on**, also clear the VF register
8xy4 | ADD Vx, Vy | Set Vx = Vx + Vy, set VF = carry\* | VF is set to 1 if the result would exceed 255, set to 0 otherwise
8xy5 | SUB Vx, Vy | Set Vx = Vx - Vy, set VF = NOT borrow\* | VF is set to 0 if the result would be less than zero, set to 1 otherwise
8xy6 | SHR Vx {, Vy} | Set Vx = Vy >> 1, VF is set to Vy&1 before the shift\* | If `LSQ` quirk is **on**, the instruction operates on Vx instead of Vy
