504 lines
16 KiB
ArmAsm
504 lines
16 KiB
ArmAsm
* AUXMEM.OSCLI.S
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* (c) BOBBI 2021 GPLv3
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*
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* Handle OSCLI system calls
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* 22-Aug-2021 Uses dispatch table
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* Prepares parameters and hands on to API call
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* 24-Aug-2021 Combined *LOAD and *SAVE, full address parsing.
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* 02-Sep-2021 *LOAD/*SAVE now uses GSTRANS.
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* 12-Sep-2021 *HELP uses subject lookup, *HELP MOS, *HELP HOSTFS.
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* COMMAND TABLE
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***************
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* Table structure is: { string, byte OR $80, destword-1 } $00
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* fsc commands
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CMDTABLE ASC 'CAT' ; Must be first command so matches '*.'
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DB $85
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DW STARFSC-1 ; CAT -> FSC 5, XY=>params
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ASC 'RUN'
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DB $84
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DW STARFSC-1 ; RUN -> FSC 4, XY=>params
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ASC 'EX'
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DB $89
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DW STARFSC-1 ; EX -> FSC 9, XY=>params
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ASC 'INFO'
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DB $8A
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DW STARFSC-1 ; INFO -> FSC 10, XY=>params
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ASC 'RENAME'
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DB $8C
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DW STARFSC-1 ; RENAME -> FSC 12, XY=>params
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* osfile commands
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ASC 'LOAD'
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DB $FF
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DW STARLOAD-1 ; LOAD -> OSFILE FF, CBLK=>filename
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ASC 'SAVE'
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DB $FF
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DW STARSAVE-1 ; SAVE -> OSFILE 00, CBLK=>filename
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ASC 'DELETE'
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DB $86
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DW STARFILE-1 ; DELETE -> OSFILE 06, CBLK=>filename
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ASC 'MKDIR'
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DB $88
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DW STARFILE-1 ; MKDIR -> OSFILE 08, CBLK=>filename
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ASC 'CDIR'
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DB $88
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DW STARFILE-1 ; CDIR -> OSFILE 08, CBLK=>filename
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* osbyte commands
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ASC 'FX'
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DB $80
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DW STARFX-1 ; FX -> OSBYTE A,X,Y (LPTR)=>params
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ASC 'OPT'
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DB $8B
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DW STARBYTE-1 ; OPT -> OSBYTE &8B,X,Y XY=>params
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* others
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ASC 'QUIT'
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DB $80
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DW STARQUIT-1 ; QUIT -> (LPTR)=>params
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ASC 'HELP'
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DB $FF
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DW STARHELP-1 ; HELP -> XY=>params
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ASC 'BASIC'
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DB $80
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DW STARBASIC-1 ; BASIC -> (LPTR)=>params
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ASC 'KEY'
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DB $80
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DW STARKEY-1 ; KEY -> (LPTR)=>params
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ASC 'ECHO'
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DB $80
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DW ECHO-1 ; ECHO -> (LPTR)=>params
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* DUMP <file>
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* TYPE <file>
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* BUILD <file>
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* terminator
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DB $FF
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* *HELP TABLE
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*************
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HLPTABLE ASC 'MOS'
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DB $80
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DW HELPMOS-1 ; *HELP MOS
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ASC 'HOSTFS'
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DB $80
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DW HELPHOSTFS-1 ; *HELP HOSTFS
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DB $FF
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* Command table lookup
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* On entry, (OSLPTR)=>command string
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* XY=>command table
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* On exit, A=0 done, command called
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* A<>0 no match
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*
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* Search command table
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CLILOOKUP STX OSTEXT+0 ; Start of command table
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STY OSTEXT+1
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LDX #0 ; (ZP,X)=>command table
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CLILP4 LDY #0 ; Start of command line
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CLILP5 LDA (OSTEXT,X)
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BMI CLIMATCH ; End of table string
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EOR (OSLPTR),Y
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AND #$DF ; Force upper case match
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BNE CLINOMATCH
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JSR CLISTEP ; Step to next table char
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INY ; Step to next command char
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BNE CLILP5 ; Loop to check
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CLINOMATCH LDA (OSLPTR),Y
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CMP #'.' ; Abbreviation?
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BEQ CLIDOT
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CLINEXT JSR CLISTEP ; No match, step to next entry
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BPL CLINEXT
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CLINEXT2 JSR CLISTEP ; Step past byte, address
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JSR CLISTEP
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JSR CLISTEP
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BPL CLILP4 ; Loop to check next
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RTS ; Exit, A>$7F
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CLIDOT LDA (OSTEXT,X)
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BMI CLINEXT2 ; Dot after full word, no match
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CLIDOT2 JSR CLISTEP ; Step to command address
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BPL CLIDOT2
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INY ; Step past dot
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BNE CLIMATCH2 ; Jump to this command
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CLIMATCH LDA (OSLPTR),Y
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CMP #'.'
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BEQ CLINEXT ; Longer abbreviation, eg 'CAT.'
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CMP #'A'
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BCS CLINEXT ; More letters, eg 'HELPER'
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CLIMATCH2 JSR CLIMATCH3 ; Call the routine
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LDA #0
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RTS ; Return A=0 to claim
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CLIMATCH3 JSR SKIPSPC ; (OSLPTR),Y=>parameters
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LDA (OSTEXT,X) ; Command byte
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PHA
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JSR CLISTEP ; Address low byte
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STA OSTEMP
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JSR CLISTEP ; Address high byte
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PLX ; Get command byte
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PHA ; Push address high
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LDA OSTEMP
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PHA ; Push address low
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TXA ; Command byte
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PHA
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ASL A ; Drop bit 7
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BEQ CLICALL ; If $80 don't convert LPTR
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JSR LPTRtoXY ; XY=>parameters
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CLICALL PLA ; A=command parameter
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RTS ; Call command routine
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CLISTEP INC OSTEXT+0,X ; Point to next table byte
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BNE CLISTEP2
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INC OSTEXT+1,X
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CLISTEP2 LDA (OSTEXT,X) ; Get next byte
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RTS
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* OSCLI HANDLER
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* On entry, XY=>command string
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* On exit, AXY corrupted or error generated
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*
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CLIHND JSR XYtoLPTR ; LPTR=>command line
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CLILP1 LDA (OSLPTR),Y
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CMP #$0D
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BEQ CLI2
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INY
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BNE CLILP1
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CLIEXIT1 RTS ; No terminating <cr>
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CLI2 LDY #$FF
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CLILP2 JSR SKIPSPC1 ; Skip leading spaces
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CMP #'*' ; Skip leading stars
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BEQ CLILP2
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CMP #$0D
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BEQ CLIEXIT1 ; Null string
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CMP #'|'
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BEQ CLIEXIT1 ; Comment
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CMP #'/'
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BEQ CLISLASH
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JSR LPTRtoXY ; Add Y to LPTR
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JSR XYtoLPTR ; LPTR=>start of actual command
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LDX #<CMDTABLE ; XY=>command table
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LDY #>CMDTABLE
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JSR CLILOOKUP ; Look for command
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BNE CLIUNKNOWN ; No match
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CLIDONE RTS
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CLISLASH JSR SKIPSPC1
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BEQ CLIDONE ; */<cr>
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LDA #$02
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BNE STARFSC2 ; FSC 2 = */filename
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CLIUNKNOWN LDA #$04
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JSR SERVICE ; Offer to sideways ROM(s)
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BEQ CLIDONE ; Claimed
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LDA #$03 ; FSC 3 = unknown command
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STARFSC2 PHA
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JSR LPTRtoXY ; XY=>command
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PLA
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STARFSC AND #$7F ; A=command, XY=>parameters
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JSR CALLFSCV ; Hand on to filing system
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TAX
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BEQ CLIDONE ; A=0, FSC call implemented
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ERRBADCMD BRK
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DB $FE
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ASC 'Bad command'
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ERRBADNUM BRK
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DB $FC
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ASC 'Bad number'
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ERRBADADD BRK
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DB $FC
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ASC 'Bad address'
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BRK
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* *FX num(,num(,num))
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*********************
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STARFX JSR SCANDEC
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BRA STARBYTE1
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* Commands passed to OSBYTE
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***************************
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STARBYTE JSR XYtoLPTR
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STARBYTE1 STA OSAREG ; Save OSBYTE number
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LDA #$00 ; Default X and Y
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STA OSXREG
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STA OSYREG
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JSR SKIPCOMMA ; Step past any comma/spaces
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BEQ STARBYTE2 ; End of line, do it
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JSR SCANDEC ; Scan for X param
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STA OSXREG ; Store it
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JSR SKIPCOMMA ; Step past any comma/spaces
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BEQ STARBYTE2 ; End of line, do it
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JSR SCANDEC ; Scan for Y param
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STA OSYREG ; Store it
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JSR SKIPSPC
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BNE ERRBADCMD ; More params, error
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STARBYTE2 LDY OSYREG
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LDX OSXREG
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LDA OSAREG
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JSR OSBYTE
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BVS ERRBADCMD
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RTS
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* Scan decimal number
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SCANDEC JSR SKIPSPC
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JSR SCANDIGIT ; Check first digit
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BCS ERRBADNUM ; Doesn't start with a digit
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SCANDECLP STA OSTEMP ; Store as current number
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JSR SCANDIGIT ; Check next digit
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BCS SCANDECOK ; No more digits
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PHA
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LDA OSTEMP
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CMP #26
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BCS ERRBADNUM ; num>25, num*25>255
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ASL A ; num*2
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ASL A ; num*4
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ADC OSTEMP ; num*4+num = num*5
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ASL A ; num*10
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STA OSTEMP
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PLA
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ADC OSTEMP ; num=num*10+digit
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BCC SCANDECLP
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BCS ERRBADNUM ; Overflowed
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SCANDECOK LDA OSTEMP ; Return A=number
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SCANDIG2 SEC
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RTS
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SCANDIGIT LDA (OSLPTR),Y
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CMP #'0'
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BCC SCANDIG2 ; <'0'
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CMP #'9'+1
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BCS SCANDIG2 ; >'9'
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INY
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AND #$0F
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RTS
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HEXDIGIT JSR SCANDIGIT
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BCC HEXDIGIT2 ; Decimal digit
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AND #$DF
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CMP #'A'
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BCC SCANDIG2 ; Bad hex character
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CMP #'G'
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BCS HEXDIGIT2 ; Bad hex character
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SBC #$36 ; Convert 'A'-'F' to $0A-$0F
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INY
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CLC
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HEXDIGIT2 RTS
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* Scan hex address
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* (OSLPTR),Y=>first character
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* $200,X = 4-byte accumulator
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SCANHEX JSR HEXDIGIT ; Get first digit
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BCS ERRBADADD1 ; Not a hex character
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STA $200,X ; Store first digit
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LDA #0
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STA $201,X ; Clear rest of accumulator
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STA $202,X
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STA $203,X
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SCANHEXLP1 JSR HEXDIGIT ; Get next digit
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BCS SKIPSPC ; Done, exit by skipping spaces
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STY OSTEMP
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LDY #4 ; Four bits to rotate
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SCANHEXLP2 ASL $200,X ; Multiple accumulator by 16
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ROL $201,X
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ROL $202,X
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ROL $203,X
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BCS ERRBADADD1 ; Overflowed
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DEY
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BNE SCANHEXLP2 ; Loop for four bits
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ORA $200,X ; Add in current digit
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STA $200,X
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LDY OSTEMP ; Get Y back
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BNE SCANHEXLP1
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ERRBADADD1 JMP ERRBADADD
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SKIPCOMMA LDA (OSLPTR),Y
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CMP #$2C
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BNE SKIPSPC ; Drop through
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*
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* Skip spaces
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SKIPSPC1 INY ; Step past a character
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SKIPSPC LDA (OSLPTR),Y
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CMP #' '
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BEQ SKIPSPC1
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CMP #$0D ; Return EQ=<cr>
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RTS
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* Skip a string
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SKIPWORD CLC
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JSR GSINIT
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SKIPWORDLP JSR GSREAD
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BCC SKIPWORDLP
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RTS
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* Convert (LPTR),Y to XY
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LPTRtoXY CLC
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TYA
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ADC OSLPTR+0
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TAX
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LDA #0
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ADC OSLPTR+1
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TAY
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RTS
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* Convert XY to (LPTR),Y
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XYtoLPTR STX OSLPTR+0
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STY OSLPTR+1
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LDY #0
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RTS
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* Print *HELP text
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STARHELP JSR XYtoLPTR ; (OSLPTR),Y=>parameters
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JSR PRHELLO ; Unify version message
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LDX #<HLPTABLE ; XY=>command table
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LDY #>HLPTABLE
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JSR CLILOOKUP ; Look for *HELP subject
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LDA $8006 ; Does ROM have service entry?
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BMI STARHELP6 ; Yes, send service call
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JSR OSNEWL
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LDA #$09 ; Language name
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LDY #$80 ; *TO DO* make this and BYTE8E
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JSR PRSTR ; use same code
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JSR OSNEWL
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STARHELP6 LDY #0 ; (OSLPTR),Y=>parameters
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LDA #9
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JMP SERVICE ; Pass to sideways ROM(s)
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HELPHOSTFS LDX #<FSCCOMMAND ; *HELP HOSTFS
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LDY #>FSCCOMMAND
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BNE HELPLIST
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HELPMOS LDX #<CMDTABLE ; *HELP MOS
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LDY #>CMDTABLE
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HELPLIST STX OSTEXT+0 ; Start of command table
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STY OSTEXT+1
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LDX #0
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HELPLP1 LDA #32
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JSR OSWRCH
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JSR OSWRCH
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HELPLP2 LDY #10
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HELPLP3 LDA (OSTEXT,X)
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BMI HELPLP4
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JSR OSWRCH
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DEY
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JSR CLISTEP
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BPL HELPLP3
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HELPLP4 LDA #32
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JSR OSWRCH
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DEY
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BNE HELPLP4
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JSR CLISTEP
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JSR CLISTEP
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JSR CLISTEP
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BPL HELPLP2
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STARHELP4 LDA #$08
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JSR OSWRCH
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JSR OSWRCH
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JMP FORCENL
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* Handle *QUIT command
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STARQUIT >>> XF2MAIN,QUIT
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STARSAVE LDA #$00 ; Set A=0 - SAVE
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STARLOAD PHA ; Entered with A=$FF - LOAD
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JSR XYtoLPTR ; OSLPTR=>filename
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JSR SKIPWORD ; Step past filename
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BNE STARLDSV3 ; filename followed by addr
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*
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* filename followed by no address, must be *LOAD name
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STARLDSV1 LDA #$FF ; $FF=load to file's address
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STARLOAD2 STA OSFILECB+6
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PLA
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BEQ ERRBADADD2 ; *save name <no addr>
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LDA #$7F ; Will become A=$FF
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JMP STARLDSVGO ; Do the load
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* At least one address specified
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STARLDSV3 LDX #OSFILECB+2-$200 ; X=>load
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JSR SCANHEX
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BNE STARSAVE3 ; Another address
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LDA #$00 ; $00=load to supplied address
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BEQ STARLOAD2 ; Only one address, must be *LOAD
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* More than one address, must be *SAVE
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STARSAVE3 PLA
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BNE ERRBADADD2 ; Can't be *LOAD
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LDX #3
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STARSAVE4 LDA OSFILECB+2,X ; Get load
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STA OSFILECB+6,X ; copy to exec
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STA OSFILECB+10,X ; and to start
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DEX
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BPL STARSAVE4
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LDA (OSLPTR),Y
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CMP #'+'
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PHP
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BNE STARSAVE5 ; Not start+length
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JSR SKIPSPC1 ; Step past '+' and spaces
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STARSAVE5 LDX #OSFILECB+14-$200
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JSR SCANHEX ; Get end or length
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PLP
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BNE STARSAVE7 ; Not +length
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LDX #0
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CLC
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STARSAVE6 LDA OSFILECB+10,X ; end=start+length
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ADC OSFILECB+14,X
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STA OSFILECB+14,X
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INX
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TXA
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AND #3
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BNE STARSAVE6
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* load =start
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* exec =start
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* start=start
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* end =end or start+length
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STARSAVE7 JSR SKIPSPC
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BEQ STARSAVE10 ; No more, do it
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LDX #OSFILECB+6-$200
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JSR SCANHEX ; Get exec
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BEQ STARSAVE10 ; No more, do it
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LDX #OSFILECB+2-$200
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JSR SCANHEX ; Get load
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BEQ STARSAVE10 ; No more, do it
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ERRBADADD2 JMP ERRBADADD ; Too many parameters
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STARSAVE10 LDA #$80 ; Will become $00 - SAVE
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STARLDSVGO LDX OSLPTR+0
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LDY OSLPTR+1 ; Continue through...
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*
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* Commands passed to OSFILE
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***************************
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STARFILE EOR #$80
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STX OSFILECB+0
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STY OSFILECB+1
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LDX #<OSFILECB
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LDY #>OSFILECB
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JSR OSFILE
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TAX
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BNE STARDONE
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JMP ERRNOTFND
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STARBASIC
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STARKEY
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STARDONE RTS
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* *ECHO <GSTRANS string>
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************************
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ECHO SEC
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ECHO0 JSR GSINIT
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ECHOLP1 JSR GSREAD
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BCS STARDONE
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JSR OSWRCH
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JMP ECHOLP1
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