public:calculator:guides:dm41x_ladybug_module
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Table of Contents
DM41X Ladybug Module
Another HP16 emulation
Ladybug Key Overlay
Details
Ladybug more user friendly, if less versatile, HP16 module than the fully-featured HP16 module by Angel Martin. Both have their uses, but for a simple calculator for bit-banging while writing 6502 assembly code Ladybug does everything, with a less convoluted User Interface.
Launching
- modules needed:
- Ladybug
- Boost
- OS/4
To switch to “Ladybug Integer” mode : XEQALPHAINTEGERALPHA
To leave (and return to normal mode) : XEQALPHAEXITAPPALPHA
Using the DM41X CST
menu simplifies this, set 2 Custom menu entries for INTEGER
and EXITAPP
Nice features
- A “CMP” function akin to 6502 - sets flags in the same way but doesn't change the register(s)
- Status Flags : C, Z, N and V equivalent to 6502 flags and set in the same way after various operations.
- Flag
0
= ZeroZ
- Flag
1
= SignN
- Flag
3
= CarryC
- Flag
4
= OverflowV
- 2's-complement mode is set with Flag
2
- Leading Zeros display is set with Flag
5
Word Size
is set with Shift+R/SWindowing
is selected with .- Bits can be
set
Shift+4,reset
Shift+5 andtested
Shift+6
- Boolean Operations on values in X and Y registers
AND
Shift+1OR
Shift+2XOR
Shift+3
NOT
Shift+CHS (invert each bit, on the value in the X register)
Shift
andRotate
functions are conveniently accessible - see Overlay picture above - without delving into menus or launchers
— John Pumford-Green 23/09/22 13:40
Further Information
public/calculator/guides/dm41x_ladybug_module.1664001893.txt.gz · Last modified: 06/03/25 06:49 GMT (external edit)