Apple-2-SW
/
Applecorn
mirror of https://github.com/bobbimanners/Applecorn.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

OSARGS 'Get Pointer' function now works (PTR# in BASIC)

This commit is contained in:
Bobbi Webber-Manners 2021-08-01 15:28:10 -04:00
parent f68f268806
commit 6daa528396
3 changed files with 57 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

BIN
applecorn.po
View File

Binary file not shown.

21
auxmem.s
View File

@ -392,34 +392,35 @@ ARGSHND PHA
BNE :S2
* TODO: Implement this for *RUN and *command
JSR BEEP
BRA :EXIT
BRA :IEXIT
:S2 CMP #$FF ; Y=0,A=FF => flush all files
BNE :IEXIT
STA $C004 ; Write main memory
STZ MOSFILE ; Zero means flush all
STA $C005 ; Write aux memory
BRA :FLUSH
:HASFILE CMP #$00 ; Y!=0,A=0 => read seq ptr
:HASFILE STA $C004 ; Write main memory
STY MOSFILE ; File ref num
STX MOSFILE+1 ; Pointer to ZP control block
STA $C005 ; Write aux memory
CMP #$00 ; Y!=0,A=0 => read seq ptr
BNE :S3
*TODO READ SEQ PTR
BRA :EXIT
>>> XF2MAIN,TELL
:IEXIT BRA :EXIT
:S3 CMP #$01 ; Y!=0,A=1 => write seq ptr
BNE :S4
*TODO WRT SEQ PTR
>>> XF2MAIN,SEEK
BRA :EXIT
:S4 CMP #$02 ; Y!=0,A=2 => read file len
BNE :S5
*TODO READ FILE LEN
>>> XF2MAIN,STAT
:S5 CMP #$FF ; Y!=0,A=FF => flush file
BNE :EXIT
STA $C004 ; Write main memory
STY MOSFILE ; File ref num
STA $C005 ; Write aux memory
:FLUSH >>> XF2MAIN,FLUSH
:EXIT PLY
PLX
PLA
RTS
OSARGSRET
>>> ENTAUX
PLY

46
mainmem.s
View File

@ -294,6 +294,52 @@ FLUSH >>> ENTMAIN
DW FLSHPL
>>> XF2AUX,OSARGSRET
* ProDOS file handling for OSARGS get len command
STAT >>> ENTMAIN
LDA MOSFILE ; File ref number
>>> XF2AUX,OSARGSRET
* ProDOS file handling for OSARGS set ptr command
SEEK >>> ENTMAIN
LDA MOSFILE ; File ref number
>>> XF2AUX,OSARGSRET
* ProDOS file handling for OSARGS get ptr command
TELL >>> ENTMAIN
LDA MOSFILE ; File ref number
STA GMARKPL+1
JSR MLI
DB GMARKCMD
DW GMARKPL
LDX MOSFILE+1 ; Pointer to ZP control block
BCS :ERR
LDA $C08B ; R/W LC RAM, bank 1
LDA $C08B
STA $C009 ; Alt ZP on
LDA GMARKPL+2
STA $00,X
LDA GMARKPL+3
STA $01,X
LDA GMARKPL+4
STA $02,X
STZ $03,X
STA $C008 ; Alt ZP off
LDA $C081 ; Bank the ROM back in
LDA $C081
:EXIT >>> XF2AUX,OSARGSRET
:ERR LDX MOSFILE+1 ; Address of ZP control block
LDA $C08B
LDA $C08B
STA $C009
STZ $00,X
STZ $01,X
STZ $02,X
STZ $03,X
STZ $C008
LDA $C081
LDA $C081
BRA :EXIT
* ProDOS file handling for MOS OSFILE LOAD call
* Return A=0 if successful
* A=1 if file not found