Apple-2-SW/AppleIIAsm-Collection
1
0
Fork 0
mirror of https://github.com/nathanriggs/AppleIIAsm-Collection.git synced 2024-12-12 01:30:00 +00:00
Code Issues Projects Releases Wiki Activity
12a0b19398
AppleIIAsm-Collection/disks/disk1_stdio/T.CURSORUDBF.SUB

204 lines
4.1 KiB
Plaintext
Raw Normal View History

STDIO disk 0.3.0 update - 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.
2019-01-14 04:48:09 +00:00
*``````````````````````````````*
* CURSFOR :: MOVE CURSOR FORWD *
*- -*
* FLAGS: NZC----- REG: AYM- *
* CYCLES: 20 *
*- -*
* USAGE: *
* LDA (AMT TO MOVE) *
* JSR CURSFOR *
*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
*
CURSFOR
CLC
ADC CURSH
STA CURSH
*
********************************
*
** ERROR CONTROL
*
********************************
*
LDA ERRCTRL
CMP #1
BEQ :CHKERR
JMP :ERREND
:CHKERR
LDA CURSH
CMP #40 ; MAX COL + 1
BCS :XOVF
JMP :ERREND
:XOVF
_ERR :E_SID;:E_XOF;:E_DMP1;RETURN;#10
*
********************************
*
:ERREND
*
********************************
*
JSR VTAB
RTS
*
** DATA
*
:E_SID ASC "CURSFOR (CURF MACRO)",00
:E_DMP1 ASC "DUMPING RETURN BLOCK...",00
:E_XOF ASC "CURSOR X OVERFLOW: X <> MIN/MAX",00
*
*``````````````````````````````*
*CURSBAK :: MOVE CURSOR BACKWD *
* *
*- -*
* FLAGS: NZC----- REG: AYM- *
* CYCLES: 26 *
*- -*
* USAGE: *
* LDA (AMT TO MOVE) *
* JSR CURSBAK *
*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
*
CURSBAK
SEC
STA SCRATCH
LDA CURSH
SBC SCRATCH
STA CURSH
*
********************************
*
** ERROR CONTROL
*
********************************
*
LDA ERRCTRL
CMP #1
BEQ :CHKERR
JMP :ERREND
:CHKERR
LDA CURSH
CMP #40 ; MIN COLUMN
BCS :XOVF
JMP :ERREND
:XOVF
_ERR :E_SID;:E_XOF;:E_DMP1;RETURN;#10
*
********************************
*
:ERREND
*
********************************
*
JSR VTAB
RTS
*
** DATA
*
:E_SID ASC "CURSBAK (CURB MACRO)",00
:E_DMP1 ASC "DUMPING RETURN BLOCK...",00
:E_XOF ASC "CURSOR X OVERFLOW: X <> MIN/MAX",00
*
*``````````````````````````````*
* CURSDN :: MOVE CURSOR DOWN *
* *
*- -*
* FLAGS: NZC----- REG: AYM- *
* CYCLES: 20 *
*- -*
* USAGE: *
* LDA (AMT TO MOVE) *
* JSR CURSDN *
*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
*
CURSDN
CLC
ADC CURSV
STA CURSV
*
********************************
*
** ERROR CONTROL
*
********************************
*
LDA ERRCTRL
CMP #1
BEQ :CHKERR
JMP :ERREND
:CHKERR
LDA CURSV
CMP #24 ; MAX ROWS
BCS :YOVF
JMP :ERREND
:YOVF
_ERR :E_SID;:E_YOF;:E_DMP1;RETURN;#10
*
********************************
*
:ERREND
*
********************************
*
JSR VTAB
RTS
*
** DATA
*
:E_SID ASC "CURSDN (CURD MACRO)",00
:E_DMP1 ASC "DUMPING RETURN BLOCK...",00
:E_YOF ASC "CURSOR Y OVERFLOW: Y <> MIN/MAX",00
*
*``````````````````````````````*
* CURSUP :: MOVE CURSOR UP *
* *
*- -*
* FLAGS: NZC----- REG: AYM- *
* CYCLES: 26 *
*- -*
* USAGE: *
* LDA (AMT TO MOVE) *
* JSR CURSUP *
*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
*
CURSUP
SEC
STA SCRATCH
LDA CURSV
SBC SCRATCH
STA CURSV
*
********************************
*
** ERROR CONTROL
*
********************************
*
LDA ERRCTRL
CMP #1
BEQ :CHKERR
JMP :ERREND
:CHKERR
LDA CURSV
CMP #24 ; MAX ROWS
BCS :YOVF
JMP :ERREND
:YOVF
_ERR :E_SID;:E_YOF;:E_DMP1;RETURN;#10
*
********************************
*
:ERREND
*
********************************
*
JSR VTAB
RTS
*
** DATA
*
:E_SID ASC "CURSUP (CURU MACRO)",00
:E_DMP1 ASC "DUMPING RETURN BLOCK...",00
:E_YOF ASC "CURSOR Y OVERFLOW: Y <> MIN/MAX",00
*
Reference in New Issue Copy Permalink