mirror of
https://github.com/nathanriggs/AppleIIAsm-Collection.git
synced 2024-12-03 18:49:28 +00:00
f5c097e70f
- added error handling - no more massive library; just a subroutine per file. This is because Merlin doesn't like large files. - added a "minify" BASIC utility that gets rid of *most* comments in a source textfile. This dramatically reduces space used if you're not terribly interested in non-inline comments. - TFILL,THLIN,TVLIN and TPUT not directly access the video memory (page one), making for a much faster draw without interfering COUT. - some stylistic changes, primarily to TFILL - change required files to minified versions only. The whole files can be found on disk 2. - got a norovirus so pretty much couldn't do anything requiring sustained attention, so focused on small things here and not on my dayjob. Cool. - created a required.vars file that separates variables and settings from the other required files. Not minified. - This current bout of revision will probably be the last, once all initial 6 disks are revamped, that focuses on all subroutines/macros in a given library at a single push. After this round, commits will be done on a subroutine or related file basis.
67 lines
1.6 KiB
Plaintext
67 lines
1.6 KiB
Plaintext
THLINE
|
|
PLA
|
|
STA RETADR
|
|
PLA
|
|
STA RETADR+1
|
|
PLA
|
|
STA :F
|
|
PLA
|
|
STA :Y
|
|
PLA
|
|
STA :X2
|
|
PLA
|
|
STA :X1
|
|
LDA ERRCTRL
|
|
CMP #1
|
|
BEQ :CHKERR
|
|
JMP :ERREND
|
|
:CHKERR
|
|
LDA :X1
|
|
CMP :X2
|
|
BCS :ERRTOOHI ; X1 => X2
|
|
LDA :X1
|
|
CMP #39
|
|
BCS :ERRXOVF ; X VALUE OVERFLOW
|
|
LDA :X2
|
|
CMP #40 ; MAX COLS + 1
|
|
BCS :ERRXOVF
|
|
LDA :Y
|
|
CMP #24 ; MAX ROWS + 1
|
|
BCS :ERRYOVF
|
|
JMP :ERREND
|
|
:ERRTOOHI
|
|
_ERR :E_SID;:E_XHI;:E_DMP1;:X1;#4
|
|
JMP :ERREND
|
|
:ERRXOVF
|
|
_ERR :E_SID;:E_XOF;:E_DMP1;:X1;#4
|
|
JMP :ERREND
|
|
:ERRYOVF
|
|
_ERR :E_SID;:E_YOF;:E_DMP1;:X1;#4
|
|
JMP :ERREND
|
|
:ERREND
|
|
LDA :Y ; LOAD ROW
|
|
LDY :X1 ; LOAD X START POS
|
|
:LOOP
|
|
JSR $F847 ; GBASCALC ROUTINE
|
|
LDA :F
|
|
STA ($26),Y ; PUSH TO SCREEN MEMORY
|
|
LDA :Y
|
|
INY ; INCREASE X POS
|
|
CPY :X2 ; IF LESS THAN X END POS
|
|
BNE :LOOP ; REPEAT UNTIL DONE
|
|
:EXIT
|
|
LDA RETADR+1
|
|
PHA
|
|
LDA RETADR
|
|
PHA
|
|
RTS
|
|
:X1 DS 1
|
|
:X2 DS 1
|
|
:Y DS 1
|
|
:F DS 1 ; FILL CHAR
|
|
:E_SID ASC "THLINE (THLIN MACRO)",00
|
|
:E_DMP1 ASC "DUMPING X1(1) X1(1) Y(1) F(1)",00
|
|
:E_XHI ASC "X1 MUST BE LOWER THAN X2.",00
|
|
:E_XOF ASC "X > # OF AVAILABLE COLUMNS.",00
|
|
:E_YOF ASC "Y > # OF AVAILABLE ROWS",00
|