ORCA-Pascal/pcommon.asm

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2018-03-12 18:15:39 +00:00
mcopy pcommon.macros
****************************************************************
*
* MMCom - common data area for the memory manager
*
****************************************************************
*
MMCom privdata
;
; constants
;
maxBuffSize equ 16*1024 size of a buffer
;
; data
;
buffSize ds 2 remaining bytes in the current buffer
currBuffHand ds 4 handle of current buffer
currBuffStart ds 4 pointer to start of current buffer
nextPtr ds 4 pointer to next byte in current buffer
end
****************************************************************
*
* BRK - break into the debugger
*
* Inputs:
* 4,S - break code
*
****************************************************************
*
BRK start
phb
plx
ply
pla
and #$00FF
xba
sta lb1
phy
phx
plb
lb1 brk $00
rtl
end
****************************************************************
*
* Calloc - allocate and clear a new memory area
*
* Inputs:
* size - # bytes to allocate
*
* Outputs:
* X-A - pointer to memory
*
* Notes: Assumes size > 2
*
****************************************************************
*
Calloc start
ptr equ 1 pointer to memory
sub (2:size),4
ph2 size allocate the memory
jsl Malloc
sta ptr
stx ptr+2
ldy size if there are an odd number of bytes then
tya
lsr A
bcc lb1
dey clear the last byte
short M
lda #0
sta [ptr],Y
long M
lb1 lda #0 clear the memory, one word at a time
lb2 dey
dey
sta [ptr],Y
bne lb2
ret 4:ptr
end
****************************************************************
*
* CompNames - Compare two names
*
* Inputs:
* name1, name2 - addresses of the two strings to compare
*
* Outputs:
* int - 0 if equal, -1 if name1<name2, 1 if name1>name2
*
****************************************************************
*
CompNames start
result equ 1
sub (4:name1,4:name2),2
short I,M
lda [name1] get the length of the shorter string
cmp [name2]
blt lb1
lda [name2]
lb1 tax
beq lb2a
ldy #1 compare the existing characters
lb2 lda [name1],Y
cmp [name2],Y
bne lb4
iny
dex
bne lb2
lb2a lda [name1] characters match -- compare the lengths
cmp [name2]
bne lb4
lb3 long I,M
lda #0 strings match
bra lb6
lb4 long I,M strings don't match -- set condition code
bge lb5
lda #-1
bra lb6
lb5 lda #1
lb6 sta result
ret 2:result
end
****************************************************************
*
* KeyPress - Has a key been presed?
*
* If a key has not been pressed, this function returns
* false. If a key has been pressed, it clears the key
* strobe. If the key was an open-apple ., a terminal exit
* is performed; otherwise, the function returns true.
*
****************************************************************
*
KeyPress start
KeyPressGS kpRec
lda kpAvailable
beq rts
ReadKeyGS rkRec
lda rkKey
cmp #'.'
bne lb1
lda rkModifiers
and #$0100
beq lb1
ph2 #0
ph4 #0
jsl TermError
lb1 lda #1
rts rtl
kpRec dc i'3'
kpKey ds 2
kpModifiers ds 2
kpAvailable ds 2
rkRec dc i'2'
rkKey ds 2
rkModifiers ds 2
end
****************************************************************
*
* Mark - mark the stack
*
* Inputs:
* ptr - location to place mark
*
****************************************************************
*
Mark start
using MMCom
sub (4:ptr),0
ldy #2 ptr^ := nextPtr
lda nextPtr
sta [ptr]
lda nextPtr+2
sta [ptr],Y
ret
end
****************************************************************
*
* MMInit - initialize the memory manager
*
****************************************************************
*
MMInit start
using MMCom
stz buffSize no bytes in current buffer
stz currBuffHand nil handle
stz currBuffHand+2
rtl
end
****************************************************************
*
* Malloc - allocate a new memory area
*
* Inputs:
* size - # bytes to allocate
*
* Outputs:
* X-A - pointer to memory
*
****************************************************************
*
Malloc start
using MMCom
ptr equ 1 pointer to memory
handle equ 5 new memory handle
lptr equ 9 work pointer
sub (2:size),12
lda buffSize if buffSize < size then begin
cmp size
bge lb2
ph4 #0 handle := AppleNew(maxBuffSize);
ph4 #maxBuffSize
ph2 >~User_ID
ph2 #$C010
ph4 #0
_NewHandle
bcc lb1
ph2 #3
ph4 #0
jsl TermError
lb1 pl4 handle
ldy #2 lptr := handle^;
lda [handle],Y currBuffStart := handle^;
sta lptr+2
sta currBuffStart+2
lda [handle]
sta lptr
sta currBuffStart
lda currBuffHand+2 lptr[0] := currBuffHand;
sta [lptr],Y
lda currBuffHand
sta [lptr]
move4 handle,currBuffHand currBuffHand := handle;
add4 lptr,#4,nextPtr nextPtr := lptr+4;
lda #maxBuffSize-4 buffSize := maxBuffSize-4;
sta buffSize
lb2 anop end;
clc ptr := nextPtr;
lda nextPtr nextPtr := nextPtr+size;
sta ptr
adc size
sta nextPtr
lda nextPtr+2
sta ptr+2
adc #0
sta nextPtr+2
sub2 buffSize,size buffSize := buffSize-size;
ret 4:ptr
end
****************************************************************
*
* ~Move - move some bytes
*
* Inputs:
* source - pointer to source bytes
* dest - pointer to destination bytes
* len - number of bytes to move
*
* Notes:
* Also used to copy strings via CopyString entry point
*
****************************************************************
*
~Move start
CopyString entry
sub (4:dest,4:source,2:len),0
lda len move one byte if the move length is odd
lsr a
bcc lb1
short M
lda [source]
sta [dest]
long M
inc4 source
inc4 dest
dec len
lb1 ldy len move the bytes
beq lb4
dey
dey
beq lb3
lb2 lda [source],Y
sta [dest],Y
dey
dey
bne lb2
lb3 lda [source]
sta [dest]
lb4 ret
end
****************************************************************
*
* Release - release previously marked memory
*
* Inputs:
* ptr - pointer supplied by Mark
*
****************************************************************
*
Release start
using MMCom
lptr equ 1 local work pointer
handle equ 5 work handle
sub (4:ptr),8
lb1 lda ptr+2 while not ((ptr >= currBuffStart)
cmp currBuffStart+2 and (ptr <= nextPtr)) do begin
bne lb2
lda ptr
cmp currBuffStart
lb2 blt lb4
lda ptr+2
cmp nextPtr+2
bne lb3
lda ptr
cmp nextPtr
lb3 ble lb5
lb4 move4 currBuffStart,lptr handle := currBuffStart[0];
ldy #2
lda [lptr]
sta handle
lda [lptr],Y
sta handle+2
ph4 currBuffHand AppleDispose(currBuffHand);
_DisposeHandle
move4 handle,currBuffHand currBuffHand := handle;
ldy #2 currBuffStart := handle^;
lda [handle]
sta currBuffStart
lda [handle],Y
sta currBuffStart+2
! nextPtr := currBuffStart+maxBuffSize;
add4 currBuffStart,#maxBuffSize,nextPtr
stz buffSize buffSize := 0;
bra lb1 end;
lb5 sec buffSize := buffSize-ptr+nextPtr;
lda nextPtr
sbc ptr
clc
adc buffSize
sta buffSize
move4 ptr,nextPtr nextPtr := ptr;
ret
end
****************************************************************
*
* StdNames - Initialize the standard names array
*
* Outputs:
* NA - set to addresses of appropriate strings
*
****************************************************************
*
StdNames start
ptrSize equ 4 size of a pointer
maxNA equ 77 # elements in NA array
move lNA,NA,#ptrSize*maxNA
rtl
lNA dc a4'l01,l02,l03,l04,l05,l06,l07,l08,l09,l10'
dc a4'l11,l12,l13,l14,l15,l16,l17,l18,l19,l20'
dc a4'l21,l22,l23,l24,l25,l26,l27,l28,l29,l30'
dc a4'l31,l32,l33,l34,l35,l36,l37,l38,l39,l40'
dc a4'l41,l42,l43,l44,l45,l46,l47,l48,l49,l50'
dc a4'l51,l52,l53,l54,l55,l56,l57,l58,l59,l60'
dc a4'l61,l62,l63,l64,l65,l66,l67,l68,l69,l70'
dc a4'l71,l72,l73,l74,l75,l76,l77'
l01 dw 'FALSE'
l02 dw 'TRUE'
l03 dw 'INPUT'
l04 dw 'OUTPUT'
l05 dw 'GET'
l06 dw 'PUT'
l07 dw 'OPEN'
l08 dw 'CLOSE'
l09 dw 'RESET'
l10 dw 'REWRITE'
l11 dw 'READ'
l12 dw 'WRITE'
l13 dw 'PACK'
l14 dw 'UNPACK'
l15 dw 'NEW'
l16 dw '@B1'
l17 dw 'READLN'
l18 dw 'WRITELN'
l19 dw 'PAGE'
l20 dw '@B2'
l21 dw 'DISPOSE'
l22 dw '@B3'
l23 dw 'SEEK'
l24 dw 'ABS'
l25 dw 'SQR'
l26 dw 'TRUNC'
l27 dw 'ROUND'
l28 dw 'ODD'
l29 dw 'ORD'
l30 dw 'CHR'
l31 dw 'PRED'
l32 dw 'SUCC'
l33 dw 'EOF'
l34 dw 'EOLN'
l35 dw 'SIN'
l36 dw 'COS'
l37 dw 'EXP'
l38 dw 'SQRT'
l39 dw 'LN'
l40 dw 'ARCTAN'
l41 dw 'HALT'
l42 dw 'SEED'
l43 dw 'DELETE'
l44 dw 'INSERT'
l45 dw 'SHELLID'
l46 dw 'COMMANDLINE'
l47 dw 'STARTGRAPH'
l48 dw 'STARTDESK'
l49 dw 'ENDGRAPH'
l50 dw 'ENDDESK'
l51 dw 'ORD4'
l52 dw 'CNVDS'
l53 dw 'CNVIS'
l54 dw 'CNVSR'
l55 dw 'CNVSI'
l56 dw 'CNVSL'
l57 dw 'RANDOM'
l58 dw 'RANDOMINTEGER'
l59 dw 'RANDOMLONGINT'
l60 dw 'CONCAT'
l61 dw 'COPY'
l62 dw 'LENGTH'
l63 dw 'POS'
l64 dw 'RANDOMDOUBLE'
l65 dw 'CNVRS'
l66 dw 'CNVSD'
l67 dw 'USERID'
l68 dw 'POINTER'
l69 dw 'TAN'
l70 dw 'ARCCOS'
l71 dw 'ARCSIN'
l72 dw 'ARCTAN2'
l73 dw 'TOOLERROR'
l74 dw 'SIZEOF'
l75 dw 'TRUNC4'
l76 dw 'ROUND4'
l77 dw 'MEMBER'
end
****************************************************************
*
* WaitForKeyPress - If necessary, wait for a keypress
*
* This routine is called after reporting non-terminal errors.
* If the user has flagged all errors as terminal (+T), a
* terminal exit is made. If the user has not, but has requested
* that the compiler wait for a keypress after printeing an error
* (+W), it waits for a keypress.
*
* Inputs:
* r0 - long address of the error message
* wait - wait for a keypress?
* allTerm - are all errors terminal?
*
****************************************************************
*
WaitForKeyPress start
using GetCom
lda allTerm if allTerm then
beq lb1
ph2 #0 do a terminal error exit;
ph4 #0
jsl TermError
lb1 lda wait if wait then begin
beq lb3
jsl DrawHourglass draw the wait symbol
lb1a jsl KeyPress get a keypress
tay
beq lb1a
jsl ClearHourglass clear the wait symbol
lb3 rtl
end