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https://github.com/badvision/lawless-legends.git
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More work on PLASMA loading.
This commit is contained in:
Martin Haye
parent
5334bca39c
commit
64c3c8298f
@ -1158,7 +1158,7 @@ disk_finishLoad: !zone
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jsr closeFile
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lda #0 ; zero out...
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sta partFileRef ; ... the file reference so we know it's no longer open
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+ lda nFixups ; any fixups encountered?
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+ lda .nFixups ; any fixups encountered?
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bne +
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jsr doAllFixups ; found fixups - execute and free them
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+ !if DEBUG { jsr printMem }
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@ -1630,48 +1630,161 @@ setupDecomp:
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; Apply fixups to all modules that were loaded this round, and free the fixup
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; resources from memory.
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doAllFixups: !zone
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ldx #1 ; start at first aux mem segment (0=main mem, 1=aux)
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.loop: lda tSegType,x ; grab flags & type
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and #$F ; just type now
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; copy the shadow code down to $100, so we can read aux mem bytes
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ldx #.fixupShadow_end - .fixupShadow - 1
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- lda .fixupShadow,x
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sta .getFixupByte,x
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dex
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bpl -
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; Now scan aux mem for fixup segments
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ldx #1 ; start at first aux mem segment (0=main mem, 1=aux)
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.loop: lda tSegType,x ; grab flags & type
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and #$F ; just type now
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cmp #RES_TYPE_FIXUP
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bne .next
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beq .found
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.next: lda tSegLink,x ; next in chain
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tax ; to X reg index
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bne .loop ; non-zero = not end of chain - loop again
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rts ; fail with X=0
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.found ; Found one fixup seg.
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lda tSegAdrLo,x ; grab its address
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sta pSrc ; save to the accessor routine
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lda tSegAdrHi,x ; hi byte too
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sta pSrc+1
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; Find the corresponding main-mem seg
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stx .resume+1 ; save scan position so we can resume later
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lda tSegRes,x ; get seg num for this fixup
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sta resNum ; that's what we're looking for
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lda #RES_TYPE_MODULE ; type module is in main mem
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sta resType ; that's the type
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lda #0 ; look in main mem
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sta isAuxCmd
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jsr scanForResource
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bne + ; we better find it
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brk
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+ lda tSegAdrLo,x ; get the segment's address
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sta .mainBase ; and save it
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lda tSegAdrHi,x ; hi byte too
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sta .mainBase+1
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; Find the corresponding aux-mem seg
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lda #RES_TYPE_BYTECODE ; it's of type bytecode
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sta resType
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inc isAuxCmd ; it'll be in aux mem
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jsr scanForResource
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bne + ; we better find it
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brk
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+ lda tSegAdrLo,x
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sta .auxBase
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lda tSegAdrHi,x
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sta .auxBase+1
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; Process the fixups
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.proc jsr .fetchFixup ; get key byte
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tay ; save it aside, and also check the hi bit
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bmi .fxAux ; yes, it's aux mem fixup
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.fxMain jsr .fetchFixup ; get the lo byte of the offset
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clc
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adc .mainBase
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sta pDst
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tya
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adc .mainBase+1
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sta pDst+1
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ldy #0
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clc
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jsr .adMain
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iny
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jsr .adMain
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bne .proc ; always taken
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.adMain lda (pDst),y
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adc .mainBase,y
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sta (pDst),y
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rts
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.fxAux cmp #$FF ; end of fixups?
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beq .resume ; if so, resume scanning
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jsr .fetchFixup ; get lo byte of offset
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clc
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adc .auxBase
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sta pDst
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tya
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and #$7F ; mask off the hi bit flag
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adc .auxBase+1
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sta pDst+1
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ldy #0
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sta setAuxWr
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jsr .adAux
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iny
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jsr .adAux
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sta clrAuxWr
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bne .proc ; always taken
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.adAux jsr .getBytecode
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adc .mainBase,y
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sta (pDst),y
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rts
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.resume ldx #11 ; self-modified earlier
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; fix up the stubs
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lda .mainBase
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sta pDst
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lda .mainBase+1
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sta pDst+1
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.stub ldy #0
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lda (pDst),y
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cmp #$20 ; stubs start with JSR $3xx
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bne .estub
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ldy #2
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lda (pDst),y
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cmp #3
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bne .estub
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clc
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ldx #0
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jsr .adStub
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inx
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jsr .adStub
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lda pDst
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clc
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adc #5
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sta pDst
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bcc .stub
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inc pDst+1
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bne .stub ; always taken
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.adStub iny
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lda (pDst),y
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adc .auxBase,x
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sta (pDst),y
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rts
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.estub ; done with stubs
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jmp .next ; go scan for more fixup blocks
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.fetchFixup:
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jsr .getFixupByte ; get a byte from aux mem
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inc pSrc ; and advance the pointer
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bne +
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inc pSrc+1 ; hi byte too, if necessary
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+ rts
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lda pTmp ; compare pTmp
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cmp tSegAdrLo,x ; to this seg addr
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lda pTmp+1 ; including...
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sbc tSegAdrHi,x ; ...hi byte
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bcc .next ; if pTmp < seg addr then keep searching
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lda pTmp ; compare pTmp
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cmp tSegAdrLo,y ; to *next* seg addr
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lda pTmp+1 ; including...
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sbc tSegAdrHi,y ; ...hi byte
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bcc .found ; if pTmp < next seg addr then perfect!
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.next: lda tSegLink,x ; next in chain
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tax ; to X reg index
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bne .loop ; non-zero = not end of chain - loop again
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rts ; fail with X=0
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.fixupShadow:
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!pseudopc $100 {
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.getFixupByte:
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sta setAuxRd
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.fixupAddr = *+1
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lda $1111
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lda (pSrc),y
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sta clrAuxRd
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rts
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.getBytecode:
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sta setAuxRd
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.bytecodeAddr = *+1
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lda $1111
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lda (pDst),y
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sta clrAuxRd
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rts
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}
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.fixupShadow_end = *
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.mainBase !word 0
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.auxBase !word 0
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;------------------------------------------------------------------------------
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; Segment tables
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!if DEBUG { !align 255,0 }
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!if DEBUG { !align 255,0 }
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tSegLink = * : !fill MAX_SEGS
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tSegType = * : !fill MAX_SEGS
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@ -6,6 +6,7 @@
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TOP_LINE = $2180 ; 24 lines down from top
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NLINES = 128
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TEX_SIZE = $555 ; 32x32 + 16x16 + 8x8 + 4x4 + 2x2 + 1x1
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PLASMA_FRAME_SIZE = $200
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; Byte offset for each pixel in the blit unroll
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BLIT_OFF0 = 5
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@ -55,6 +56,7 @@ mapWidth = $62 ; len 1
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mapHeight = $63 ; len 1
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spriteX = $64 ; len 2
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spriteY = $66 ; len 2
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plasmaFrames = $68 ; len 2
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; Sprite calculations zero page
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bSgnSinT = $90
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@ -87,24 +89,20 @@ expandVec = $800
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;---------------------------------
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; Main-mem tables and buffers
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tableStart = $A000
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decodeTo01 = $A000
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decodeTo01b = $A100
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decodeTo23 = $A200
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decodeTo23b = $A300
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decodeTo45 = $A400
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decodeTo56 = $A500
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decodeTo57 = $A600
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clrBlitRollE = $A700 ; size 3*(128/2) = $C0, plus 2 for tya and rts
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clrBlitRollO = $A7C2 ; size 3*(128/2) = $C0, plus 2 for tya and rts
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texAddrLo = $A884
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tableStart = $A700
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decodeTo01 = $A700
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decodeTo01b = $A800
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decodeTo23 = $A900
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decodeTo23b = $AA00
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decodeTo45 = $AB00
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decodeTo56 = $AC00
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decodeTo57 = $AD00
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clrBlitRollE = $AE00 ; size 3*(128/2) = $C0, plus 2 for tya and rts
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clrBlitRollO = $AEC2 ; size 3*(128/2) = $C0, plus 2 for tya and rts
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texAddrLo = $AF84
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texAddrHi = texAddrLo + MAX_TEXTURES
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blitRoll = $A900 ; Unrolled blitting code. Size 29*128 = $E80, plus 1 for rts
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tableEnd = $B781
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plasmaCode = $B800
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plasmaFrames = $BD00
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plasmaEnd = $BF00
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blitRoll = $B000 ; Unrolled blitting code. Size 29*128 = $E80, plus 1 for rts
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tableEnd = $BE81
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; mipmap level offsets
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MIP_OFFSET_0 = 0
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@ -13,7 +13,7 @@ start:
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; Conditional assembly flags
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DOUBLE_BUFFER = 1 ; whether to double-buffer
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DEBUG = 1 ; 1=some logging, 2=lots of logging
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DEBUG = 0 ; 1=some logging, 2=lots of logging
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DEBUG_COLUMN = -1
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; temporary hack to try blocker sprites
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@ -1568,14 +1568,12 @@ initMem: !zone
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ldy #>(tableEnd-tableStart)
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jsr mainLoader
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; Reserve memory for the PLASMA frame stack
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lda #SET_MEM_TARGET
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ldx #<plasmaFrames
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ldy #>plasmaFrames
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jsr mainLoader
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lda #REQUEST_MEMORY
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ldx #<(plasmaEnd-plasmaFrames)
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ldy #>(plasmaEnd-plasmaFrames)
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ldx #0
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ldy #>PLASMA_FRAME_SIZE
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jsr mainLoader
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stx plasmaFrames
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sty plasmaFrames+1
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; Load the font engine
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!if DEBUG { +prStr : !text "Loading font engine.",0 }
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lda #SET_MEM_TARGET
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@ -1586,16 +1584,6 @@ initMem: !zone
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ldx #RES_TYPE_CODE
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ldy #3 ; hard coded for now: code #3 is the font engine
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jsr mainLoader
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; Load the font engine
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!if DEBUG { +prStr : !text "Loading game loop.",0 }
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lda #SET_MEM_TARGET
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ldx #<plasmaCode
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ldy #>plasmaCode
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jsr mainLoader
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lda #QUEUE_LOAD
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ldx #RES_TYPE_CODE
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ldy #4 ; hard coded for now: code #4 is the game loop
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jsr mainLoader
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!if DEBUG { +prStr : !text "Loading expansion code.",0 }
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; Load the texture expansion code into aux mem.
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lda #SET_MEM_TARGET
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@ -1642,8 +1630,6 @@ initMem: !zone
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pla
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tax ; and hi byte in X
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jsr setFONT
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; Test PLASMA
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jsr plasmaCode
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; Set to write text on both hi-res pages at the same time
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lda #pHGR3
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jsr displayMODE
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