mirror of
https://github.com/pkali/micro-sparta-dos.git
synced 2026-05-20 22:34:22 +02:00
Pawel Kalinowski
81 lines
1.4 KiB
Plaintext
Executable File
81 lines
1.4 KiB
Plaintext
Executable File
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lines = 24
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screenSize = lines*40+dlend-dl+1
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screenStart
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sbw MEMTOP #screenSize newDLaddress
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lda newDLAddress+1
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and #$F0
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sta newAddressTemp+1
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lda MEMTOP+1
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and #$F0
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cmp newAddressTemp+1
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beq screenFitsInSamePageAsMEMTOP
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mva #0 newAddressTemp
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lda MEMTOP+1
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and #$F0
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sta newAddressTemp+1
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sbw newAddressTemp #screenSize newDLaddress
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screenFitsInSamePageAsMEMTOP
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;now adjust the screen pointer in DL
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adw newDLaddress #dlend-dl newScreenAddress
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mwa newScreenAddress PdlScreenAddress
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mwa newDLaddress PdlJumpAddress
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/* move dl to the new home */
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mwa Pdl tempA
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mwa newDLAddress tempB
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ldy #dlend-dl-1
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dlMoveLoop
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lda (tempA),y
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sta (tempB),y
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dey
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bpl dlMoveLoop ;CAUTION!!! dl Must be shorter than 128 bytes!!!
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mwa newDLaddress DLPTRS
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vdli dli
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mva #$0e $2c8 ;COLBAKS
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rts
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newDLaddress
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dta $00, $00
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newAddressTemp
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newScreenAddress
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dta $00, $00
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;---------------
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Pdli DTA V(dli)
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dli
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pha
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sta WSYNC
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mva VCOUNT COLBAK
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pla
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rti
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Pdl
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DTA V(dl) ;this is spartaaaaa
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PdlScreenAddress
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DTA V(dlScreenAddress)
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PdlJumpAddress
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DTA V(dlJumpAddress)
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dl
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dta $70,$70,$70+$80
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dta $42+$80
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dlScreenAddress
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dta a (screen)
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:lines-1 dta $02+$80
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dta $41
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dlJumpAddress
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dta a(dl)
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dlend
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.IF dlend-dl >127
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.ERROR "DL too long"
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.ENDIF
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screen
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dta d"aba"
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:40 dta $00
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;-----------------------------
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