Re: A86: Re: shell.asm

To: assembly-86@lists.ticalc.org
Subject: Re: A86: Re: shell.asm
From: Ben Mickle <bmickle@yahoo.com>
Date: Fri, 12 Mar 1999 14:06:58 -0800 (PST)
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-86@lists.ticalc.org
Reply-To: assembly-86@lists.ticalc.org

61 bytes :)



---David Phillips <david@acz.org> wrote:
>
> Hehe, Dux did it.  64 bytes...anything else?
> 
> >I'm new at this shell stuff.  Can it be smaller than 68 bytes?  It runs
> both
> >basic and asm programs.  When running programs and when exiting, the cursor
> >starts on the second line (like they ran the program from the home screen).
> 

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; shell (for lack of a better name)
; by David Phillips <david@acz.org>
; http://www.acz.org/

#include "ti86asm.inc"

.org _asm_exec_ram

Top:
 ld hl,StartingName
 rst 20h

Down:
 sub a
 call _FindAlphaUp
 
DisplayProgram:
 call _clrLCD
 call _homeup
 ld hl,_OP1+2
 call _puts
 call _newline

MainLoop:
 call _getkey
 sub kUp
 jr z,Up
 dec a		;kDown
 jr z,Down
 sub kExit-kDown
 ret z
 inc a
 jr nz,MainLoop

RunProgram:
 rst 10h
 call _check_asm
 push af
 call z,_exec_assembly
 pop af
 jp nz,_exec_basic
 jr Top

Up:				;a is already zero
 call _FindAlphaDn
 jr DisplayProgram
 
StartingName:
 .db $12,1,0

.end