A86: Launch Pad stuff

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A86: Launch Pad stuff

Hello again!!
Thanks to all who sent me input on Launch Pad. I have made a bunch of
changes, and now the program is much more stable.
It still doesn't work with Rascall, but i made it so that it detects
Rascall, but will not run it.  If SCaBBy is reading this, please tell me
why this is so.


Now, I am trying to make a user on routine which will start up Launch Pad
when you turn the calc on. However, it is having a really tough time
working.  First of all, it puts the flashing cursor up in the top, left
hand corner of the Screen. To fix this, i just moved the damn _curRow off
of the screen, which seemed to work fine. Then when i tried to run a shell,
the calc went into spasms, gave me an error 15 memory, and when i hit
"Quit", it shut down. I had to pull my backup battery twice to reset the
damn thing.
Could Someone tell me what is wrong with the code?

launcher.86p

#include "asm86.h"
#include "ti86asm.inc"

_alt_on_chksum		equ		$d48f
_alt_on_exec		equ		$d490
_exec_basic			equ		$4C57
.org _asm_exec_ram
   
	ld hl,alt_on
	ld de,_alt_on_exec
	ld bc,alt_on_end-alt_on
	ldir
   
	ld a,(_alt_on_exec)
	ld hl,_alt_on_chksum+($28*1)
	add a,(hl)
	ld hl,_alt_on_chksum+($28*2)
	add a,(hl)
	ld hl,_alt_on_chksum+($28*3)
	add a,(hl)
	ld hl,_alt_on_chksum+($28*4)
	add a,(hl)
	ld hl,_alt_on_chksum+($28*5)
	add a,(hl)
	ld (_alt_on_chksum),a
	set 3,(iy+$23)
	ret

alt_on:
	ld		hl,$1515
	ld		(_curRow),hl
	ld		hl,LaunchName
	rst		20h
	rst		10h
	jp		c,Error
	call	_exec_assembly
	call	_clrScrn
	ld		hl,$0000
	ld		(_curRow),hl
	ret

Error:
	call	_clrScrn
	ld		hl,$0000
	ld		(_curRow),hl
	ld		hl,ErrorMsg
	call	_puts
	ret

ErrorMsg:
	.db "Launch Pad Not Found!",0

LaunchName:
	.db	$12,$08,"launcher",0

alt_on_end:

.end




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