Plus Games Code Repack: Casio Fx991es

Appendix: Full keystroke listing for repacked Snake game available on request.

Original hex snippet:

8F 7C 03 12 40 00 01 2A

Repacked keystrokes (abbreviated):

[CONST] 40 [STO] [A]
[CONST] 01 [STO] [B]
[VCT] [1] [0] [=] [AC]
[MODE] 8 [1] 3 [=] [AC]
[1] [STO] [VctA] [1] ... 

| Address range | Purpose | |---------------|---------| | 0xE0 – 0xEF | Variable registers (A, B, C, D, X, Y, M) | | 0xF0 – 0xFF | Matrix/vector dimension + data pointers | | 0x0C00 – 0x0C5F | Display buffer (31×96 / 8) bytes | | 0x0E00 – 0x0EFF | Key handler jump table (critical) |

Games often overwrite 0x0E20–0x0E2F to redirect [=] or [AC] to custom routines. casio fx991es plus games code repack

The standard "fx-991ES PLUS Game Code Repack v.3.2" typically includes the following titles.

Repacks must avoid:

Since the calculator has no checksum, repacks are verified by: