Pasting register values to Ans

[Mapar007]

How do I paste a register or flag value to the Ans variable? I use _StoAns, but you need to convert the reg/flag to Op1. How do you do that?

[adje]

day 18 of asm28days. floating point arithmetic.

b_call(_move9toOP1)
moves 9 bytes to OP1. data starts at (HL)

you could also use RST 20h. but i dont know in which mode you should be or how the different calculators (TI84+ or TI83+) can react. (?)

i take it that you just want Ans to be a Real-variable.

[darkstone knight]

if i recall correctly, there is a bcall(_SETOPXXXX) that copies HL to OP1

edit: http://www.unitedti.org/index.php?showtopic=8283

[brandonw]

_mov9ToOP1/rst 20h moves the 9 bytes pointed to by HL to OP1. It doesn't put a floating-point value there unless HL is also pointing to a floating-point value, which it won't be if the value you want to convert is in HL.

So _SetXXXXOP2 and _OP2ToOP1 is what you want for HL, and _SetXXOP1 for A.

[DarkerLine]

If the value you want is definitely under 100, then put it in A and do bcall _SetXXOP1 followed by bcall _StoAns. If it could be higher (up to 65535), put it in HL and do bcall _SetXXXXOP2, bcall _OP2ToOP1, then bcall _StoAns.

[Mapar007]

And for flags?

ld a,f didn't work with tasm on calc, but I'll try it with the normal tasm.

[darkstone knight]

you cant use F for anny inscruction except EX af,af' and some undocumented port command... ( OUT ©,F i think)

[brandonw]

If you want the value of the flags register, you can use the stack, like: push af \ pop hl \ ld a,l

[FloppusMaximus]

There's an undocumented instruction that some people call "IN F,(C​)". This is a rather deceptive name; the instruction doesn't store the input value in F, or anywhere else. Instead it just reads a byte and discards it, but it sets the flags in the same way IN A,(C​) would.

The only way to get the value of F is PUSH AF; the only way to set it directly is POP AF.

Edit: © ? Come on, people. :hmpf:

[Mapar007]

thanks!!