Re: A86: HI.
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Re: A86: HI.
Don't do it like that! Program writeback is bad! Save the variables in a
hidden variable, such as %game (replacing "game" with a distinctive title
for your game). This has a few advantages, the biggest of which is that if
the game is transferred to another calculator, the data doesn't go with it,
which is (almost always) a good thing.
----- Original Message -----
From: David Phillips <david@acz.org>
To: <assembly-86@lists.ticalc.org>
Sent: Friday, December 10, 1999 11:55 PM
Subject: Re: A86: HI.
> Write back. Store the variables inside your program like this:
>
> GameSaveData: ; put this somewhere like the end of your program
> ...
> PlayerMoney: .dw 0
> PlayerLevel: .dw 0
> ...
> GameSaveDataSize = $ - GameSaveData
>
> Then write it back with a routine like this:
>
> ld hl,ProgramVar-1
> rst 20h
> rst 10h
> call _ex_ahl_bde
> ld de,GameSaveData-_asm_exec_ram+4
> add hl,de
> adc a,0
> call _set_abs_dest_addr
> sub a
> ld hl,GameSaveData
> call _set_abs_src_addr
> ld hl,GameSaveDataSize
> call _set_mm_num_bytes
> call _mm_ldir
> ret
>
> ProgramVar:
> .db 4,"name" ; 4 is the number of chars in 'name', which is the
> program variable's name
>
> Note that I haven't done any 86 coding in a while and I just ripped this
> from my last project, so there could be a more optimized way...
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