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SHR: Further cleanup and fixes

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Bobbi Webber-Manners 2023-01-11 01:13:35 -05:00
parent 5912bd118f
commit df6970a52f
2 changed files with 16 additions and 40 deletions
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applecorn.po
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56
mainmem.shr.s
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@ -236,13 +236,10 @@ SHRVDU5CH >>> ENTMAIN
CMP #$02 ; 2 is 320-mode (MODE 1)
BNE :MODE0
LDA #$04 ; 4 bytes per row in MODE 1
LDX #08 ; 8 pixels per char in MODE 1
ASL A1L ; A*32 -> A1L/H in MODE 1
BRA :S0
:MODE0 LDA #$02 ; 2 bytes per row in MODE 0
LDX #8 ; 8 pixels per char in MODE 0
:S0 STA :BYTES
* STX :PIXELS
CLC ; Add SHRFONTXPLD to A1L/H
LDA A1L
@ -286,8 +283,9 @@ SHRVDU5CH >>> ENTMAIN
STX A2L
LSR A2L ; Divide by 2
LDX SHRPIXELS
CPX #$02
LDA SHRPIXELS
AND #$00FF
CMP #$02
BEQ :M1 ; MODE 1
LSR A2L ; Divide by 2 again
:M1 LDX A1L ; Index into exploded font
@ -319,17 +317,6 @@ SHRVDU5CH >>> ENTMAIN
LDA :ROWCTR
CMP #$08 ; 8 rows
BNE :L0
* REP #$30 ; 16 bit M & X
* MX %00 ; Tell Merlin
* LDA SHRXPIXEL
* CLC
* ADC :PIXELS ; Advance to next column
* CMP SHRWINRGT
* BCS :NEWLINE ; X-pos >= limit
* STA SHRXPIXEL
* BRA :DONE
*:NEWLINE JSR SHRVDU5LF
:DONE SEC ; 65816 emulation mode
XCE
MX %11 ; Tell Merlin
@ -339,7 +326,6 @@ SHRVDU5CH >>> ENTMAIN
:COLCTR EQU TMPZP+0
:ROWCTR EQU TMPZP+2
:BYTES EQU TMPZP+4 ; Bytes per char row
*:PIXELS EQU TMPZP+6 ; Pixels per char row
* Handle cursor left in VDU5 mode
@ -350,24 +336,16 @@ SHRVDU08 >>> ENTMAIN
XCE
REP #$30 ; 16 bit M & X
MX %00 ; Tell Merlin
LDA SHRPIXELS ; Pixels per byte
AND #$00FF
CMP #$02 ; 2 is 320-mode (MODE 1)
BNE :MODE0
LDX #8 ; 8 pixels per char in MODE 1
BRA :S0
:MODE0 LDX #8 ; 8 pixels per char in MODE 0
:S0 STX :PIXELS
LDA SHRXPIXEL
SEC
SBC :PIXELS ; Move to previous column
SBC #$08 ; Move to previous column
CMP SHRWINLFT
BMI :PREVLINE
STA SHRXPIXEL
BRA :DONE
:PREVLINE LDA SHRWINRGT
SEC
SBC :PIXELS
SBC #$08
STA SHRXPIXEL
LDA SHRYPIXEL
CLC ; Add 8 rows (go up)
@ -385,7 +363,6 @@ SHRVDU08 >>> ENTMAIN
MX %11 ; Tell Merlin
PLP
>>> XF2AUX,VDU08RET
:PIXELS DW :PIXELS
* Handle cursor right in VDU5 mode
@ -396,17 +373,9 @@ SHRVDU09 >>> ENTMAIN
XCE
REP #$30 ; 16 bit M & X
MX %00 ; Tell Merlin
LDA SHRPIXELS ; Pixels per byte
AND #$00FF
CMP #$02 ; 2 is 320-mode (MODE 1)
BNE :MODE0
LDX #8 ; 8 pixels per char in MODE 1
BRA :S0
:MODE0 LDX #8 ; 8 pixels per char in MODE 0
:S0 STX :PIXELS
LDA SHRXPIXEL
CLC
ADC :PIXELS ; Advance to next column
ADC #$08 ; Advance to next column
CMP SHRWINRGT
BCS :NEWLINE ; X-pos >= limit
STA SHRXPIXEL
@ -419,7 +388,6 @@ SHRVDU09 >>> ENTMAIN
MX %11 ; Tell Merlin
PLP
>>> XF2AUX,VDU09RET
:PIXELS DW $00 ; Pixels per char
* Handle cursor down / linefeed in VDU5 mode
@ -1262,11 +1230,19 @@ SHRVDU26 >>> ENTMAIN
STZ SHRWINLFT+1
STZ SHRWINBTM+0
STZ SHRWINBTM+1
LDA #<639
LDY SHRPIXELS
CPY #$02
BNE :MODE0
LDA #<319
STA SHRWINRGT+0
LDA #>319
STA SHRWINRGT+1
BRA :S1
:MODE0 LDA #<639
STA SHRWINRGT+0
LDA #>639
STA SHRWINRGT+1
LDA #<199
:S1 LDA #<199
STA SHRWINTOP+0
LDA #>199
STA SHRWINTOP+1