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Jeffrey
Member
Joined: 12 Jun 2003
Posts: 212
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 Posted: 04 Nov 2003 09:37:27 pm Post subject: |
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| Does anyone have any source code that demostrates finding and displaying the names of programs on the calculator, or reading single characters from an appvar? If so, please do reply! |
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NETWizz
Byte by bit
Bandwidth Hog
Joined: 20 May 2003
Posts: 2369
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| Posted: 05 Nov 2003 12:42:34 am Post subject: |
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To read a single character, find the appvar, go past the size bytes and then use bcall(_PutC)
Essentially, an ascii character is simply a hex value. For example 41h is 'A' |
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Justin W.
Shattered Silence
Advanced Member
Joined: 24 May 2003
Posts: 429
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| Posted: 05 Nov 2003 12:58:05 am Post subject: |
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Sorry JBirk but you forgot. After incrementing twice to get past the size bytes you must
ld a,(de)
before using bcall(_PutC)
I know you know this, I'm just clearing up any confusion that might be caused.
bcall(_PutC) will display the ascii char of the value in A |
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NETWizz
Byte by bit
Bandwidth Hog
Joined: 20 May 2003
Posts: 2369
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| Posted: 05 Nov 2003 01:29:39 pm Post subject: |
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Yeah, register A is the curucial input for _PutC
You should also set the currow and curcol values. You can do this by loading hl and lading currow.
I.e
ld hl, 7*256+1 ;load h with 7 and L with 1 |
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Jeffrey
Member
Joined: 12 Jun 2003
Posts: 212
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| Posted: 05 Nov 2003 04:26:09 pm Post subject: |
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| Thanks. Anyone have source for listing programs? |
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JacobdeHaan
Member
Joined: 10 Jul 2003
Posts: 165
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| Posted: 05 Nov 2003 11:09:14 pm Post subject: |
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Yes, you would find what you're looking for in Ti 83 plus in 28 days:
Code:
RES AppTextSave,(IY + AppFlags)
b_call(_ClrLCDFull)
LD HL,(ProgPtr); Start of Symbol Table for programs
MainLoop:
LD DE,0
LD (CurRow),DE
LD C,7 ; Counter. We can display 7 variables per screen
FindLoop:
LD DE,(PTemp); Check to see if we're at the end of the symbol table
OR A
SBC HL,DE
JR Z,Done
JR C,Done
ADD HL,DE ; Restore HL
LD A,(HL) ; Check the [T] of entry, take appropriate action
AND $1F ; Bitmask off bits 7-5 to get type only.
CP ProgObj
JR Z,IsProgram
CP ProtProgObj
JR NZ,Skip
IsProgram:
CP ProgObj
JR Z,IsNormalProg
LD A,'#' ; We'll use a hash to signify a protected program...
JR DispStatus
IsNormalProg:
LD A,' ' ; ...or space padding for a normal program
DispStatus:
b_call(_PutC) ; Display protection status
; At this point, HL -> [T], so we'll move back six bytes to [NL]
LD DE,-6
ADD HL,DE
LD B,(HL) ; Store number of characters in name for DJNZ
DispNameLoop:
DEC HL
LD A,(HL)
b_call(_PutC)
DJNZ DispNameLoop
DEC HL ; Move back one byte so HL -> [T] of next entry
LD A,(CurRow); Move to next line. Can't use _NewLine because it
INC A ; destroys all registers
LD (CurRow),A
XOR A
LD (CurCol),A
DEC C ; Subtract counter
JR NZ,FindLoop
PUSH HL
b_call(_GetKey) ; Press any key...
b_call(_ClrLCDFull)
POP HL
JR MainLoop
Skip:
; Skip an entry
OR A
LD DE,6
SBC HL,DE
LD E,(HL) ; Put name length in E to skip
INC E ; Add 1 to go to [T] of next entry
SBC HL,DE
JR FindLoop
Done:
b_call(_GetKey)
SET AppTextSave,(IY + AppFlags)
RET ; That's all folks!
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Jeffrey
Member
Joined: 12 Jun 2003
Posts: 212
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| Posted: 06 Nov 2003 04:13:34 pm Post subject: |
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| Doesnt findalphaup do the same thing? How do you use that? |
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NETWizz
Byte by bit
Bandwidth Hog
Joined: 20 May 2003
Posts: 2369
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| Posted: 06 Nov 2003 04:52:29 pm Post subject: |
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| That one works the same only it goes through the list in the reverse order. |
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sgm
Calc Guru
Joined: 04 Sep 2003
Posts: 1265
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| Posted: 06 Nov 2003 05:19:49 pm Post subject: |
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Jeffrey wrote: Doesnt findalphaup do the same thing? How do you use that?
I hear that it is one helluva slow routine. There's also SrchVListUp. |
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David
The XORcist!
Advanced Member
Joined: 20 May 2003
Posts: 268
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| Posted: 07 Nov 2003 06:13:37 am Post subject: |
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| FindAlphaUp/dn is not so 'helluva' slow as you think. When you can accomplish the same with a single bcall as with one page of assembly code, then choose the first method. Another advantage is that you get the names sorted in alphabetical order. |
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AlienCC
Creative Receptacle!
Know-It-All
Joined: 24 May 2003
Posts: 1927
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| Posted: 07 Nov 2003 06:24:43 am Post subject: |
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I have some source code that does just that for the Ti-85, but we all know it operates a bit differently then the ti-83/83p.
Anyways, I did release the source code to the lite version of probably the most impressive program I ever wrote (FutureOS) for the Ti-85 which is not at all an OS, but rather a shell so to speak.
 (Lite)  (Full)
Feel free to browse through the code and perhaps learn a trick or two :)
The Source Code!
--AlienCC |
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Z80 & 68k Assembly => z80 & ez80 Assembly
