489 lines
18 KiB
OpenEdge ABL
489 lines
18 KiB
OpenEdge ABL
; do *NOT* use register4 to register7 during time slicing
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textStr EQU register0
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textNum EQU register0
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textBak EQU register0
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textHex EQU register1
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textSpc EQU register1
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textLen EQU register2
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textOfs EQU register3
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textChr EQU register8
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textFont EQU register9
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textSlice EQU register10
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scanLine EQU register11
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digitMult EQU register12
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digitIndex EQU register13
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clearLoop EQU register14
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%SUB clearCursorRow
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; clears the top giga_yfont lines of pixels in preparation of text scrolling
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clearCursorRow PUSH
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LD fgbgColour
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ST giga_sysArg0
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ST giga_sysArg0 + 1
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ST giga_sysArg2
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ST giga_sysArg2 + 1 ; 4 pixels of colour
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LDWI SYS_Draw4_30 ; setup 4 pixel SYS routine
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STW giga_sysFn
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LDWI giga_videoTable ; current cursor high byte address
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PEEK
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ST giga_sysArg4 + 1
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LDI giga_yfont
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clearCR_loopy ST clearLoop
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%if TIME_SLICING
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CALL realTimeStubAddr
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%endif
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LDI giga_xres
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clearCR_loopx SUBI 4 ; loop is unrolled 4 times
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ST giga_sysArg4
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SYS 30
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SUBI 4
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ST giga_sysArg4
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SYS 30
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SUBI 4
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ST giga_sysArg4
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SYS 30
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SUBI 4
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ST giga_sysArg4
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SYS 30
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BGT clearCR_loopx
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INC giga_sysArg4 + 1 ; next line
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LD clearLoop
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SUBI 1
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BNE clearCR_loopy
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LDWI printInit
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CALL giga_vAC ; re-initialise the SYS registers
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POP
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RET
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%ENDS
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%SUB printInit
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printInit LDWI SYS_VDrawBits_134
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STW giga_sysFn
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LDW fgbgColour
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STW giga_sysArg0
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LD cursorXY + 1 ; xy = peek(256+2*y)*256 + x
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LSLW
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INC giga_vAC + 1
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PEEK
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ST giga_sysArg4 + 1
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LD cursorXY
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ST giga_sysArg4 ; xy position
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RET
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%ENDS
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%SUB printText
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; prints text string pointed to by textStr
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printText PUSH
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LDWI printInit
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CALL giga_vAC
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; first byte is length
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printT_char INC textStr ; next char
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LDW textStr
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PEEK
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BEQ printT_exit ; check for delimiting zero
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ST textChr
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LDWI printChar
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CALL giga_vAC
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BRA printT_char
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printT_exit POP
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RET
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%ENDS
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%SUB printLeft
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; prints left sub string pointed to by textStr
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printLeft PUSH
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LDWI printInit
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CALL giga_vAC
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LD textLen
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BEQ printL_exit
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printL_char ST textLen
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INC textStr ; next char
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LDW textStr
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PEEK
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ST textChr
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LDWI printChar
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CALL giga_vAC
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LD textLen
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SUBI 1
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BNE printL_char
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printL_exit POP
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RET
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%ENDS
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%SUB printLower
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; prints lower case version of textStr
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printLower PUSH
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LDWI printInit
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CALL giga_vAC
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printLo_next INC textStr ; next char, (skips length byte)
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LDW textStr
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PEEK
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BEQ printLo_exit
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ST textChr
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SUBI 65
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BLT printLo_char
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LD textChr
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SUBI 90
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BGT printLo_char
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LD textChr ; >= 65 'A' and <= 90 'Z'
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ADDI 32
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ST textChr
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printLo_char LDWI printChar
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CALL giga_vAC
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BRA printLo_next
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printLo_exit POP
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RET
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%ENDS
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%SUB printUpper
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; prints upper case version of textStr
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printUpper PUSH
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LDWI printInit
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CALL giga_vAC
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printUp_next INC textStr ; next char, (skips length byte)
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LDW textStr
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PEEK
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BEQ printUp_exit
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ST textChr
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SUBI 97
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BLT printUp_char
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LD textChr
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SUBI 122
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BGT printUp_char
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LD textChr ; >= 97 'a' and <= 122 'z'
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SUBI 32
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ST textChr
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printUp_char LDWI printChar
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CALL giga_vAC
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BRA printUp_next
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printUp_exit POP
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RET
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%ENDS
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%SUB printRight
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; prints right sub string pointed to by textStr
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printRight PUSH
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LDWI printInit
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CALL giga_vAC
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LDW textStr
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PEEK ; text length
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ADDW textStr
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SUBW textLen
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STW textStr ; text offset
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LD textLen
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BEQ printR_exit
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printR_char ST textLen
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INC textStr ; next char
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LDW textStr
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PEEK
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ST textChr
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LDWI printChar
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CALL giga_vAC
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LD textLen
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SUBI 1
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BNE printR_char
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printR_exit POP
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RET
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%ENDS
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%SUB printMid
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; prints sub string pointed to by textStr
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printMid PUSH
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LDWI printInit
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CALL giga_vAC
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LDW textStr
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ADDW textOfs
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STW textStr ; textStr += textOfs
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LD textLen
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BEQ printM_exit
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printM_char ST textLen
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INC textStr ; next char
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LDW textStr
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PEEK
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ST textChr
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LDWI printChar
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CALL giga_vAC
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LD textLen
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SUBI 1
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BNE printM_char
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printM_exit POP
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RET
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%ENDS
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%SUB printDigit
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; prints single digit in textNum
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printDigit PUSH
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LDW textNum
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printD_index SUBW digitMult
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BLT printD_cont
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STW textNum
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INC digitIndex
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BRA printD_index
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printD_cont LD digitIndex
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BEQ printD_exit
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ORI 0x30
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ST textChr
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LDWI printChar
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CALL giga_vAC
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LDI 0x30
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ST digitIndex
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printD_exit POP
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RET
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%ENDS
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%SUB printInt16
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; prints 16bit int in textNum
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printInt16 PUSH
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LDWI printInit
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CALL giga_vAC
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LDI 0
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ST digitIndex
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LDW textNum
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BGE printI16_pos
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LDI 0x2D
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ST textChr
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LDWI printChar
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CALL giga_vAC
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LDI 0
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SUBW textNum
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STW textNum
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printI16_pos LDWI 10000
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STW digitMult
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LDWI printDigit
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CALL giga_vAC
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LDWI 1000
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STW digitMult
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LDWI printDigit
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CALL giga_vAC
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LDI 100
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STW digitMult
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LDWI printDigit
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CALL giga_vAC
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LDI 10
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STW digitMult
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LDWI printDigit
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CALL giga_vAC
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LD textNum
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ORI 0x30
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ST textChr
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LDWI printChar
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CALL giga_vAC
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POP
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RET
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%ENDS
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%SUB printChr
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; prints char in textChr for standalone calls
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printChr PUSH
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LDWI printInit
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CALL giga_vAC
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LDWI printChar
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CALL giga_vAC
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POP
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RET
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%ENDS
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%SUB printSpc
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; prints textSpc spaces
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printSpc PUSH
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LD textSpc
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BEQ printS_exit
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LDWI printInit
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CALL giga_vAC
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printS_loop LDI 32
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STW textChr
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LDWI printChar
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CALL giga_vAC
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LD textSpc
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SUBI 1
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ST textSpc
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BNE printS_loop
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printS_exit POP
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RET
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%ENDS
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%SUB printHex
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; print textLen hex digits in textHex, (textStr, textHex, textLen = strAddr, strHex, strLen in string::stringHex)
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printHex PUSH
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LDWI textWorkArea
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STW strAddr
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LDWI stringHex
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CALL giga_vAC
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LDWI printText
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CALL giga_vAC
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POP
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RET
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%ENDS
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%SUB printChar
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; prints char in textChr
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printChar LD textChr
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ANDI 0x7F ; char can't be bigger than 127
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SUBI 82
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BGE printC_text82
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ADDI 50
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BLT printC_exit ; char<32 exit
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STW textChr ; char-32
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LDWI giga_text32 ; text font slice base address for chars 32-81
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BRA printC_font
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printC_text82 STW textChr ; char-82
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LDWI giga_text82 ; text font slice base address for chars 82+
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printC_font STW textFont
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LD textChr
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LSLW
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LSLW
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ADDW textChr
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ADDW textFont
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STW textFont ; char*5 + textFont
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LDI 0x05
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printC_slice ST textSlice
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LDW textFont ; text font slice base address
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LUP 0x00 ; get ROM slice
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ST giga_sysArg2
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SYS 134 ; draw vertical slice, SYS_VDrawBits_134, 270 - 134/2 = 0xCB
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INC textFont ; next vertical slice
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INC giga_sysArg4 ; next x
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LD textSlice
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SUBI 1
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BNE printC_slice
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ST giga_sysArg2 ; result of printC_slice is 0
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SYS 134 ; draw last blank slice
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INC giga_sysArg4 ; using sysArg4 as a temporary cursor address for multiple char prints
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PUSH
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%if TIME_SLICING
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CALL realTimeStubAddr
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%endif
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LDWI printClip
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CALL giga_vAC
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POP
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printC_exit RET
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%ENDS
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%SUB printClip
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printClip LD cursorXY
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ADDI giga_xfont
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ST cursorXY
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SUBI giga_xres - giga_xfont ; last possible char on line
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BLE printCl_exit
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LDI DISABLE_CLIP_BIT
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ANDW miscFlags ; is text clipping disabled?
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BNE printCl_exit
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PUSH
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LDWI newLineScroll ; next row, scroll at bottom
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CALL giga_vAC
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POP
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printCl_exit RET
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%ENDS
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%SUB newLineScroll
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; print from top row to bottom row, then start scrolling
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newLineScroll LDI giga_CursorX ; cursor x start
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ST cursorXY
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ST giga_sysArg4
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LDI ENABLE_SCROLL_BIT
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ANDW miscFlags
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BNE newLS_cont0 ; is scroll on or off?
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RET
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newLS_cont0 PUSH
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LDI ON_BOTTOM_ROW_BIT
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ANDW miscFlags ; is on bottom row flag?
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BNE newLS_cont1
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LD cursorXY + 1
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ADDI giga_yfont
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ST cursorXY + 1
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SUBI giga_yres
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BLT newLS_exit
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LDI giga_yres - giga_yfont
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ST cursorXY + 1
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newLS_cont1 LDWI clearCursorRow
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CALL giga_vAC
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LDWI giga_videoTable
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STW scanLine
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%if TIME_SLICING
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newLS_scroll CALL realTimeStubAddr
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LDW scanLine
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%else
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newLS_scroll LDW scanLine
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%endif
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PEEK
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ADDI giga_yfont
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ANDI 0x7F
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SUBI giga_yfont
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BGE newLS_adjust
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ADDI giga_yfont
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newLS_adjust ADDI giga_yfont
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POKE scanLine
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INC scanLine ; scanline pointers are 16bits
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INC scanLine
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LD scanLine
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SUBI 0xF0 ; scanline pointers end at 0x01EE
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BLT newLS_scroll
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LDI ON_BOTTOM_ROW_BIT
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ORW miscFlags
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STW miscFlags ; set on bottom row flag
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newLS_exit LDWI printInit
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CALL giga_vAC ; re-initialise the SYS registers
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POP
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RET
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%ENDS
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%SUB atTextCursor
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atTextCursor LD cursorXY
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SUBI giga_xres - giga_xfont
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BLE atTC_checkY
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LDI 0
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ST cursorXY
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atTC_checkY LD cursorXY + 1
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SUBI giga_yres - giga_yfont
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BLT atTC_resbot
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LDI giga_yres - giga_yfont
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ST cursorXY + 1
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LDI ON_BOTTOM_ROW_BIT
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ORW miscFlags
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STW miscFlags ; set on bottom row flag
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RET
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atTC_resbot LDWI ON_BOTTOM_ROW_MSK
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ANDW miscFlags
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STW miscFlags ; reset on bottom row flag
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RET
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%ENDS |