[A83] Re: Printerdriver for the TI-83(+)

To: <assembly-83@lists.ticalc.org>
Subject: [A83] Re: Printerdriver for the TI-83(+)
From: "Ronald Teune" <rtwolf@gmx.net>
Date: Sat, 7 Jul 2001 20:21:29 +0200
Reply-To: assembly-83@lists.ticalc.org


>A thought for optimization:

Looks good, but it's only neccesary because of size (you smallend it a huge
bit!), not speed, since it has to be slown down enourmously.

>SendData:
>     ld   a,(hl)    ;hl=input
>     inc  hl
>     or   a
>     jr   z,sendDataDone
>     ld   b,8
>     ld   c,a
>SendByteLoop:
>     ..[wait]..
>     rr   c

;I'm just starting asm coding (well, 6 months probably) so I don't know
;many commands.
;What does 'rr' do? Roll Right & bit?
;This could be extremely useful, because if the bits should be rolled
;left it can be done by changing one command instead of 8.

>     jr   c,sendBit1
>sendBit0:
>     ld   a,$C0
>     jr   sendBitDone
>sendBit1:
>     ld   a,$C3
>sendBitDone:
>     out  (0),a
>     djnz sendByteLoop
>     jr   sendData
>sendDataDone:
>     ld   hl,txt
>     bcall(_puts)
>     ret
>txt:
>     .db "Thank you for   "
>     .db "using [name]    "
>     .db "made by http:// "
>     .db "zeekoe.cjb.net  "
>     .db "Thanks to:      "
>     .db [list of names]
>
>>From: "Ronald Teune" <rtwolf@gmx.net>
>>
>>Concept printer driver for the ti 83(+):
>>
>>Begin:
>>     ld a,(hl)    ;hl=input
>>     cp $00
>>     jr z,stop
>>     [wait]
>>     bit a,0
>>     call nz,out1
>>     call z,out0
>>      [wait]
>>     bit a,1
>>     call nz,out1
>>     call z,out0
>>     [wait]
>>     bit a,2
>>     call nz,out1
>>     call z,out0
>>     [wait]
>>     bit a,3
>>     call nz,out1
>>     call z,out0
>>     (...)
>>     [wait]
>>     bit a,7
>>     call nz,out1
>>     call z,out0
>>     inc hl
>>     jp begin
>>out0:
>>     [wait]
>>     ld a,C0h
>>     out(00),a
>>     ret
>>out1:
>>     [wait]
>>     ld a,C3h
>>     out(00),a
>>     ret
>>stop:
>>     ld hl,txt
>>     bcall(_puts)
>>     ret
>>txt:
>>     .db "Thank you for   "
>>     .db "using [name]    "
>>     .db "made by http:// "
>>     .db "zeekoe.cjb.net  "
>>     .db "Thanks to:      "
>>     .db [list of names]
>
>
>_________________________________________________________________
>Download MSN Explorer gratis van http://explorer.msn.nl/intl.asp
>
>
>

Follow-Ups:

[A83] Re: Printerdriver for the TI-83(+)

From: "David Phillips" <david@acz.org>