Re: A86: writeback

To: assembly-86@lists.ticalc.org
Subject: Re: A86: writeback
From: Ben Mickle <bmickle@yahoo.com>
Date: Sun, 4 Apr 1999 09:04:48 -0700 (PDT)
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-86@lists.ticalc.org
Reply-To: assembly-86@lists.ticalc.org


You do not need call _load_ram_ahl.  Also, make it ld
de,data-_asm_exec_ram+4 (for the program header)

--- ComAsYuAre@aol.com wrote:
> 
> can somebody help me with this writeback routine for
> saving high scores and 
> such?
> 
> when i try this routine, it doesn't seem to do
> anything at all to the data in 
> the original program.
> 
> save_data:
> 	ld hl,varname
> 	rst 20h			;copy to OP1
> 	rst 10h			;_findsym
> 	jr c,quit			;renamed - so no write back
> 	ld a,b
> 	ex de,hl
> 	call _load_ram_ahl
> 	ld de,data-_asm_exec_ram		;offset
> 	add hl,de			;hl=pointer to data in original prog
> 	adc a,0			;in case we overlapped
> 	call _SET_ABS_DEST_ADDR
> 	xor a				;no absolute addressing now
> 	ld hl,data	;get data from here
> 	call _SET_ABS_SRC_ADDR
> 	ld hl,36			;number of bytes to save
> 	call _SET_MM_NUM_BYTES
> 	call _mm_ldir		;copy data
> 
> 
> 

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Re: A86: writeback

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