Hello,
I whipped up this ridiculously small sprite converter program this morning, for those of you feeling the crunch of less memory. It will convert the 8x8 sprite in the top left corner of the screen to hex for you, weighing only
60 bytes! I challenge - no, I *dare* you to make a smaller sprite converter.
(Download)
Assembly. It's the only way to get that small. I wrote something similar in Axe that weighed 147 bytes.
I just wrote one that is 60 bytes on the calc (TI-86). It's really only 47 bytes of actual code.
Nice. This one is for the TI-83+ Family, though.
SirCmpwn wrote:
Nice. This one is for the TI-83+ Family, though.
True, and I don't know much about the 83+ series. They might require more code to access the graph screen or to print to the homescreen than the 86, or something.
Anyway, I just made my version smaller: 39 bytes of code, or 52 bytes on the calc. Here's my source if you want to use it in yours:
Code: ; small sprite converter for TI-86
; by Christopher Williams
; 2011-03-26
_plotSScreen equ 0xc9fa
_putc equ 0x4a2b
_newline equ 0x4a5f
.org 0xd748
ld hl,_plotSScreen
ld de,16 ; height of graph screen in bytes
ld b,8
xor a
@loop
rld ; get the first digit
call @digit
call @digit
add hl,de
djnz @loop
jp _newline
@digit
push af ; save this digit
add a,'0'
cp '9'+1
jr c,@notaf
add a,'A'-'0'-10
@notaf
call _putc
pop af ; restore digit
rld ; get next digit
ret
EDIT: inlined the printhex routine. This didn't affect the size at all, but it looks cleaner. I also renamed it from "ssc" to "tssc" (for a more fair size comparison with "WSSC"), so it's now 53 bytes on calc.
Code: asm(prgmWSSC
I win 
qazz42 wrote:
Code: asm(prgmWSSC
I win I don't see any credits, looks like plagiarism of SirC's code.
comicIDIOT wrote:
qazz42 wrote:
Code: asm(prgmWSSC
I win I don't see any credits, looks like plagiarism of SirC's code.
Plus you need to add 6 bytes or so for "asm(", "prgm", and "WSSC", or more if you put that inside a BASIC program. So yours is at least 66 bytes.
Where is the source code for SirCmpwn's program?
KermMartian wrote:
Where is the source code for SirCmpwn's program?
(Download)
SirCmpwn's code:
Code: ; Worlds Smallest Sprite Converter
; Converts the 8x8 sprite on
; the graph screen to hex
nolist
include "ti83plus.inc"
list
db 0BBh, 6Dh
org 9D95h
ld hl, plotsscreen
ld b, 8
ld de, 12
Loop:
ld a, (hl)
call DispHexA
add hl, de
djnz Loop
ret
DispHexA:
push af
rrca
rrca
rrca
rrca
call dispha
pop af
call dispha
ret
dispha:
and 15
cp 10
jr nc,dhlet
add a,48
jr dispdh
dhlet:
add a,55
dispdh:
bcall PutC
ret
db 0
An optimization: Code: pop af
call dispha
ret
dispha:
to Code: pop af
dispha:
Saves four bytes.
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