mirror of
https://github.com/dschmenk/PLASMA.git
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Working Apple 1 PLASMA
This commit is contained in:
David Schmenk
parent
236854afe3
commit
a4efc25d4e
426
src/a1cmd.pla
426
src/a1cmd.pla
@ -1,17 +1,12 @@
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const MODADDR = $1000
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;
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; ROMCALL return register structure.
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;
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const acc = 0
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const xreg = 1
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const yreg = 2
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const preg = 3
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;
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; SOS flags
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;
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const O_READ = 1
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const O_WRITE = 2
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const O_READ_WRITE = 3
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const MODADDR = $1000
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const inbuff = $200
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const CFFADest = $00
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const CFFAFileName = $02
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const CFFAOldName = $04
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const CFFAFileType = $06
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const CFFAAuxType = $07
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const CFFAFileSize = $09
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const CFFAEntryPtr = $0B
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;
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; Pedefined functions.
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;
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@ -69,13 +64,12 @@ word stdlibsym = @exports
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;
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; String pool.
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;
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byte console[] = ".CONSOLE"
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byte version[] = "PLASMA 0.9\n"
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byte version[] = "\nPLASMA 0.9\n"
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byte freestr[] = "MEM FREE:$"
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byte errorstr[] = "ERR:$"
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byte prompt[] = "PLASMA"
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byte okstr[] = "OK"
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byte huhstr[] = "?\n"
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byte prefix[128] = ""
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byte hexchar[] = '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'
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;
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; System variable.
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@ -87,12 +81,26 @@ word perr
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word cmdptr
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;
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; CALL SOS
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; SYSCALL(CMD, PARAMS)
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; SYSCALL(CMD)
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;
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asm syscall
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LDA ESTKL,X
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STX ESP
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TAX
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JSR $900C
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LDX ESP
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STA ESTKL,X
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LDY #$00
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STY ESTKH,X
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RTS
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end
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;
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; QUIT TO MONITOR
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;
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asm quit
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JMP $9000
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end
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;
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; SET MEMORY TO VALUE
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; MEMSET(ADDR, SIZE, VALUE)
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;
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@ -202,16 +210,6 @@ CPYMEX INX
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RTS
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end
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;
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; COPY FROM MAIN MEM TO EXT MEM.
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;
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; MEMXCPY(DIR, EXT, DST, SRC, SIZE)
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; DIR = 0 : COPY FROM MAIN TO EXT
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; DIR = 1 : COPY FROM EXT TO MAIN
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;
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asm memxcpy
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RTS
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end
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;
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; Unsigned word comparisons.
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;
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asm uword_isge
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@ -477,39 +475,92 @@ end
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;
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; CONSOLE I/O
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;
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def cout(ch)
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if ch == $0D
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ch = $0A0D
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else
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fin
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asm cout
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LDA ESTKL,X
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JSR TOUPR
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ORA #$80
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JMP $FFEF
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end
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def cin
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byte ch
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return ch
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asm cin
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DEX
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- LDA $D011
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BPL -
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LDA $D010
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AND #$7F
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STA ESTKL,X
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LDA #$00
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STA ESTKH,X
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RTS
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end
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def crout
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return cout($0D)
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end
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def prstr(str)
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if (str).[^str] == $0D
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cout($0A)
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fin
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byte i
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i = 1
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while i <= ^str
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cout((str)[i])
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i = i + 1
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loop
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end
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def rdstr(prompt)
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byte ch, maxlen, i
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maxlen = 0
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inbuff.0 = 0
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cout(prompt)
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if (heap).[^heap] == $0D
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^heap = ^heap - 1
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fin
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repeat
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ch = cin
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when ch
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is $08 ; right arrow
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if inbuff.0 < maxlen
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inbuff.0 = inbuff.0 + 1
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ch = inbuff[inbuff.0]
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cout(ch)
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fin
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is $15 ; left arrow
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if inbuff.0
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cout('\\')
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cout(inbuff[inbuff.0])
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inbuff.0 = inbuff.0 - 1
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fin
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is $04 ; ctrl-d
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if inbuff.0
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cout('#')
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cout(inbuff[inbuff.0])
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for i = inbuff.0 + 1 to maxlen
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inbuff[i - 1] = inbuff[i]
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next
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maxlen = maxlen - 1
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inbuff.0 = inbuff.0 - 1
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fin
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is $0C ; ctrl-l
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crout
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prstr(inbuff)
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is $0D ; return
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is $18 ; ctrl-x
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crout
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inbuff.0 = 0
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is $9B ; escape
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inbuff.0 = 0
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ch = $0D
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otherwise
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cout(ch)
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inbuff.0 = inbuff.0 + 1
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inbuff[inbuff.0] = ch
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if inbuff.0 > maxlen
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maxlen = inbuff.0
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fin
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wend
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until ch == $0D or inbuff.0 == $7F
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cout($0D)
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return heap
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return inbuff
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end
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def home
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return cout(28)
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end
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def gotoxy(x, y)
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end
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def viewport(left, top, width, height)
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end
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def crout
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return cout($0D)
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end
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def prbyte(v)
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cout(hexchar[(v >> 4) & $0F])
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return cout(hexchar[v & $0F])
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@ -522,85 +573,23 @@ end
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; CFFA1 routines
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; FILE I/O
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;
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def getpfx(path)
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byte params[4]
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^path = 0
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params.0 = 2
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params:1 = path
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params.3 = 128
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perr = syscall($C7, @params)
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return path
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end
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def setpfx(path)
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byte params[3]
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params.0 = 1
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params:1 = path
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perr = syscall($C6, @params)
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return path
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end
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def volume(devname, volname, ttlblks, freblks)
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byte params[9]
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params.0 = 4
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params:1 = devname
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params:3 = volname
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params:5 = 0
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params:7 = 0
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perr = syscall($C5, @params)
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*ttlblks = params:5
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*freblks = params:7
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def opendir
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perr = syscall($10)
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return perr
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end
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def open(path, access)
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byte params[7]
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params.0 = 4
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params:1 = path
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params.3 = 0
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params:4 = @access
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params.6 = 1
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perr = syscall($C8, @params)
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return params.3
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def readdir
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perr = syscall($12)
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return *CFFAEntryPtr
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end
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def close(refnum)
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byte params[2]
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params.0 = 1
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params.1 = refnum
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perr = syscall($CC, @params)
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return perr
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def finddirentry(filename)
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*CFFAFileName = filename
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perr = syscall($14)
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return *CFFAEntryPtr
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end
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def newline(refnum, set, char)
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byte params[4]
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params.0 = 1
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params.1 = refnum
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params.2 = set
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params.3 = char
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perr = syscall($C9, @params)
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return perr
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end
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def read(refnum, buff, len)
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byte params[8]
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params.0 = 4
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params.1 = refnum
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params:2 = buff
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params:4 = len
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params:6 = 0
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perr = syscall($CA, @params)
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return params:6
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end
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def write(refnum, buff, len)
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byte params[6]
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params.0 = 3
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params.1 = refnum
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params:2 = buff
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params:4 = len
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perr = syscall($CB, @params)
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def readfile(filename, buffer)
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*CFFADest = buffer
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*CFFAFileName = filename
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perr = syscall($22)
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return perr
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end
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;
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@ -642,29 +631,6 @@ end
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;
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; DCI table routines,
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;
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;def dumptbl(tbl)
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; byte len
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;
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; while ^tbl
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; len = 0
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; while ^tbl & $80
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; cout(^tbl)
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; tbl = tbl + 1
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; len = len + 1
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; loop
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; cout(^tbl)
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; tbl = tbl + 1
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; cout(':')
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; while len < 15
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; cout(' ')
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; len = len + 1
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; loop
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; cout('$')
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; prword(*tbl)
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; crout
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; tbl = tbl + 2
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; loop
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;end
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def addtbl(dci, val, last)
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while ^dci & $80
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^*last = ^dci
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@ -720,16 +686,12 @@ def adddef(addr, deflast)
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(defentry).0 = $20
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(defentry):1 = interp
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(defentry):3 = addr
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(defentry).4 = 0 ; null out next entry
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(defentry).5 = 0 ; null out next entry
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return defentry
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end
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def lookupdef(addr, deftbl)
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while (deftbl).0 == $20
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if (deftbl):3 == addr
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;prword(addr)
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;cout('>')
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;prword(deftbl)
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;crout
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return deftbl
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fin
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deftbl = deftbl + 5
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@ -741,37 +703,31 @@ def loadmod(mod)
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word addr, modaddr, modfix, modend
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word deftbl, deflast
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word moddep, rld, esd, sym
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byte str[16], filename[32]
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byte header[128]
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byte str[17], filename[17]
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;
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; Read the RELocatable module header (first 128 bytes)
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;
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dcitos(mod, @filename)
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refnum = open(@filename, O_READ)
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if refnum > 0
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rdlen = read(refnum, @header, 128)
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modsize = header:0
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moddep = @header.1
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dcitos(mod, @filename)
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rdlen = (finddirentry(@filename)):$15
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if rdlen > 0
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readfile(@filename, heap)
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modsize = (heap):0
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moddep = heap+1
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defofst = modsize
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init = 0
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if rdlen > 4 and header:2 == $DA7E ; DAVE = magic number :-)
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if rdlen > 4 and (heap):2 == $DA7E ; DAVE = magic number :-)
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;
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; This is an EXTended RELocatable (data+bytecode) module.
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;
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systemflags = header:4 | systemflags
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defofst = header:6
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defcnt = header:8
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init = header:10
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moddep = @header.12
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defofst = (heap):6
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defcnt = (heap):8
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init = (heap):10
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moddep = heap + 12
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;
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; Load module dependencies.
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;
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while ^moddep
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if !lookupmod(moddep)
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if refnum
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close(refnum)
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refnum = 0
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fin
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if loadmod(moddep) < 0
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return perr
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fin
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@ -784,33 +740,25 @@ def loadmod(mod)
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deftbl = allocheap(defcnt * 5 + 1)
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deflast = deftbl
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^deflast = 0
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if !refnum
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;
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; Reset read pointer.
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;
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refnum = open(@filename)
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rdlen = read(refnum, @header, 128)
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fin
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;
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; Re-read file
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;
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readfile(@filename, heap)
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moddep = heap + 12
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while ^moddep
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moddep = moddep + dcitos(moddep, @str)
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loop
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fin
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;
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; Alloc heap space for relocated module (data + bytecode).
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;
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moddep = moddep + 1
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modfix = moddep - @header.2 ; Adjust to skip header
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modfix = moddep - (heap + 2) ; Adjust to skip header
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modsize = modsize - modfix
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rdlen = rdlen - modfix - 2
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modaddr = allocheap(modsize)
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memcpy(modaddr, moddep, rdlen)
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;
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; Read in remainder of module into memory for fixups.
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;
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addr = modaddr;
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repeat
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addr = addr + rdlen
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rdlen = read(refnum, addr, 4096)
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until rdlen <= 0
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close(refnum)
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;
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; Apply all fixups and symbol import/export.
|
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;
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modfix = modaddr - modfix
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@ -834,13 +782,6 @@ def loadmod(mod)
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else
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addr = (rld):1 + modfix
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if uword_isge(addr, modaddr) ; Skip fixups to header
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;if uword_isge(addr, modend)
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; cout('<')
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; prword((rld):1)
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; cout('>')
|
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; prword(rld)
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; crout
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;fin
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if ^rld & $80 ; WORD sized fixup.
|
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fixup = *addr
|
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else ; BYTE sized fixup.
|
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@ -887,10 +828,6 @@ def loadmod(mod)
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fin
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esd = esd + 3
|
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loop
|
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;
|
||||
; Free up end-of-module main memory.
|
||||
;
|
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releaseheap(modend)
|
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else
|
||||
perr = perr | 0x100
|
||||
return -perr
|
||||
@ -906,68 +843,37 @@ end
|
||||
;
|
||||
; Command mode
|
||||
;
|
||||
def volumes
|
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end
|
||||
def catalog(optpath)
|
||||
byte path[64]
|
||||
byte refnum
|
||||
byte firstblk
|
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byte entrylen, entriesblk
|
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byte i, type, len
|
||||
def catalog
|
||||
byte type, len
|
||||
word entry, filecnt
|
||||
|
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if ^optpath
|
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memcpy(@path, optpath, ^optpath + 1)
|
||||
else
|
||||
getpfx(@path)
|
||||
prstr(@path)
|
||||
crout()
|
||||
fin
|
||||
refnum = open(@path, O_READ)
|
||||
if perr
|
||||
return perr
|
||||
fin
|
||||
firstblk = 1
|
||||
opendir
|
||||
repeat
|
||||
if read(refnum, heap, 512) == 512
|
||||
entry = heap + 4
|
||||
if firstblk
|
||||
entrylen = (heap).$23
|
||||
entriesblk = (heap).$24
|
||||
filecnt = (heap):$25
|
||||
entry = entry + entrylen
|
||||
entry = readdir
|
||||
if !perr
|
||||
type = ^entry
|
||||
if type
|
||||
len = type & $0F
|
||||
^entry = len
|
||||
prstr(entry)
|
||||
if type & $F0 == $D0 ; Is it a directory?
|
||||
cout('/')
|
||||
len = len + 1
|
||||
elsif (entry).$10 == $FF
|
||||
cout('-')
|
||||
len = len + 1
|
||||
elsif (entry).$10 == $FE
|
||||
cout('+')
|
||||
len = len + 1
|
||||
fin
|
||||
for len = 19 - len downto 0
|
||||
cout(' ')
|
||||
next
|
||||
fin
|
||||
for i = firstblk to entriesblk
|
||||
type = ^entry
|
||||
if type <> 0
|
||||
len = type & $0F
|
||||
^entry = len
|
||||
prstr(entry)
|
||||
if type & $F0 == $D0 ; Is it a directory?
|
||||
cout('/')
|
||||
len = len + 1
|
||||
elsif (entry).$10 == $FF
|
||||
cout('-')
|
||||
len = len + 1
|
||||
elsif (entry).$10 == $FE
|
||||
cout('+')
|
||||
len = len + 1
|
||||
fin
|
||||
for len = 19 - len downto 0
|
||||
cout(' ')
|
||||
next
|
||||
filecnt = filecnt - 1
|
||||
fin
|
||||
entry = entry + entrylen
|
||||
next
|
||||
firstblk = 0
|
||||
else
|
||||
filecnt = 0
|
||||
fin
|
||||
until filecnt == 0
|
||||
close(refnum)
|
||||
crout()
|
||||
return 0
|
||||
fin
|
||||
until perr
|
||||
perr = 0
|
||||
return crout()
|
||||
end
|
||||
def stripchars(strptr)
|
||||
while ^strptr and ^(strptr + 1) <> ' '
|
||||
@ -1052,18 +958,16 @@ loop
|
||||
; Handle commands.
|
||||
;
|
||||
while 1
|
||||
prstr(getpfx(@prefix))
|
||||
prstr(@prompt)
|
||||
cmdptr = rdstr($BA)
|
||||
if ^cmdptr
|
||||
when toupper(parsecmd(cmdptr))
|
||||
is 'Q'
|
||||
; reboot()
|
||||
quit
|
||||
is 'M'
|
||||
syscall($02)
|
||||
is 'C'
|
||||
catalog(cmdptr)
|
||||
is 'P'
|
||||
setpfx(cmdptr)
|
||||
is 'V'
|
||||
volumes()
|
||||
catalog
|
||||
is '+'
|
||||
execmod(cmdptr)
|
||||
otherwise
|
||||
|
||||
88
src/plvm01.s
88
src/plvm01.s
@ -5,9 +5,6 @@
|
||||
;* SYSTEM ROUTINES AND LOCATIONS
|
||||
;*
|
||||
;**********************************************************
|
||||
;
|
||||
; HARDWARE REGISTERS
|
||||
;
|
||||
;*
|
||||
;* VM ZERO PAGE LOCATIONS
|
||||
;*
|
||||
@ -57,7 +54,7 @@ SEGBEGIN LDA #$00 ; INIT FRAME POINTER
|
||||
LDA #>SEGEND
|
||||
STA SRCH
|
||||
LDX #ESTKSZ/2 ; INIT EVAL STACK INDEX
|
||||
!SOURCE "a1cmd.a"
|
||||
JMP A1CMD
|
||||
;*
|
||||
;* SYSTEM INTERPRETER ENTRYPOINT
|
||||
;*
|
||||
@ -94,6 +91,47 @@ FETCHOP LDA (IP),Y
|
||||
STA *+4
|
||||
JMP (OPTBL)
|
||||
;*
|
||||
;* MUL TOS-1 BY TOS
|
||||
;*
|
||||
MUL STY IPY
|
||||
LDY #$00
|
||||
STY TMPL ; PRODL
|
||||
STY TMPH ; PRODH
|
||||
LDY #$10
|
||||
MUL1 LSR ESTKH,X ; MULTPLRH
|
||||
ROR ESTKL,X ; MULTPLRL
|
||||
BCC MUL2
|
||||
LDA ESTKL+1,X ; MULTPLNDL
|
||||
CLC
|
||||
ADC TMPL ; PRODL
|
||||
STA TMPL
|
||||
LDA ESTKH+1,X ; MULTPLNDH
|
||||
ADC TMPH ; PRODH
|
||||
STA TMPH
|
||||
MUL2 ASL ESTKL+1,X ; MULTPLNDL
|
||||
ROL ESTKH+1,X ; MULTPLNDH
|
||||
DEY
|
||||
BNE MUL1
|
||||
INX
|
||||
LDA TMPL ; PRODL
|
||||
STA ESTKL,X
|
||||
LDA TMPH ; PRODH
|
||||
STA ESTKH,X
|
||||
LDY IPY
|
||||
JMP NEXTOP
|
||||
;*
|
||||
;* OPCODE TABLE
|
||||
;*
|
||||
!ALIGN 255,0
|
||||
OPTBL !WORD ZERO,ADD,SUB,MUL,DIV,MOD,INCR,DECR ; 00 02 04 06 08 0A 0C 0E
|
||||
!WORD NEG,COMP,BAND,IOR,XOR,SHL,SHR,IDXW ; 10 12 14 16 18 1A 1C 1E
|
||||
!WORD LNOT,LOR,LAND,LA,LLA,CB,CW,SWAP ; 20 22 24 26 28 2A 2C 2E
|
||||
!WORD DROP,DUP,PUSH,PULL,BRGT,BRLT,BREQ,BRNE ; 30 32 34 36 38 3A 3C 3E
|
||||
!WORD ISEQ,ISNE,ISGT,ISLT,ISGE,ISLE,BRFLS,BRTRU ; 40 42 44 46 48 4A 4C 4E
|
||||
!WORD BRNCH,IBRNCH,CALL,ICAL,ENTER,LEAVE,RET,NEXTOP ; 50 52 54 56 58 5A 5C 5E
|
||||
!WORD LB,LW,LLB,LLW,LAB,LAW,DLB,DLW ; 60 62 64 66 68 6A 6C 6E
|
||||
!WORD SB,SW,SLB,SLW,SAB,SAW,DAB,DAW ; 70 72 74 76 78 7A 7C 7E
|
||||
;*
|
||||
;* INTERNAL DIVIDE ALGORITHM
|
||||
;*
|
||||
_NEG LDA #$00
|
||||
@ -150,47 +188,6 @@ _DIV6 ROL ESTKL+1,X ; DVDNDL
|
||||
LDY IPY
|
||||
RTS
|
||||
;*
|
||||
;* OPCODE TABLE
|
||||
;*
|
||||
!ALIGN 255,0
|
||||
OPTBL !WORD ZERO,ADD,SUB,MUL,DIV,MOD,INCR,DECR ; 00 02 04 06 08 0A 0C 0E
|
||||
!WORD NEG,COMP,BAND,IOR,XOR,SHL,SHR,IDXW ; 10 12 14 16 18 1A 1C 1E
|
||||
!WORD LNOT,LOR,LAND,LA,LLA,CB,CW,SWAP ; 20 22 24 26 28 2A 2C 2E
|
||||
!WORD DROP,DUP,PUSH,PULL,BRGT,BRLT,BREQ,BRNE ; 30 32 34 36 38 3A 3C 3E
|
||||
!WORD ISEQ,ISNE,ISGT,ISLT,ISGE,ISLE,BRFLS,BRTRU ; 40 42 44 46 48 4A 4C 4E
|
||||
!WORD BRNCH,IBRNCH,CALL,ICAL,ENTER,LEAVE,RET,NEXTOP ; 50 52 54 56 58 5A 5C 5E
|
||||
!WORD LB,LW,LLB,LLW,LAB,LAW,DLB,DLW ; 60 62 64 66 68 6A 6C 6E
|
||||
!WORD SB,SW,SLB,SLW,SAB,SAW,DAB,DAW ; 70 72 74 76 78 7A 7C 7E
|
||||
;*
|
||||
;* MUL TOS-1 BY TOS
|
||||
;*
|
||||
MUL STY IPY
|
||||
LDY #$00
|
||||
STY TMPL ; PRODL
|
||||
STY TMPH ; PRODH
|
||||
LDY #$10
|
||||
MUL1 LSR ESTKH,X ; MULTPLRH
|
||||
ROR ESTKL,X ; MULTPLRL
|
||||
BCC MUL2
|
||||
LDA ESTKL+1,X ; MULTPLNDL
|
||||
CLC
|
||||
ADC TMPL ; PRODL
|
||||
STA TMPL
|
||||
LDA ESTKH+1,X ; MULTPLNDH
|
||||
ADC TMPH ; PRODH
|
||||
STA TMPH
|
||||
MUL2 ASL ESTKL+1,X ; MULTPLNDL
|
||||
ROL ESTKH+1,X ; MULTPLNDH
|
||||
DEY
|
||||
BNE MUL1
|
||||
INX
|
||||
LDA TMPL ; PRODL
|
||||
STA ESTKL,X
|
||||
LDA TMPH ; PRODH
|
||||
STA ESTKH,X
|
||||
LDY IPY
|
||||
JMP NEXTOP
|
||||
;*
|
||||
;* NEGATE TOS
|
||||
;*
|
||||
NEG LDA #$00
|
||||
@ -968,4 +965,5 @@ LEAVE LDY #$01
|
||||
PLA
|
||||
STA IFPH
|
||||
RET RTS
|
||||
A1CMD !SOURCE "a1cmd.a"
|
||||
SEGEND = *
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user