mirror of
https://github.com/stid/woz64.git
synced 2025-01-17 15:30:40 +00:00
feat: optimizations
This commit is contained in:
Stefano Furiosi
parent
b4ed402b31
commit
6e9d803dce
@ -1,7 +1,6 @@
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#importonce
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#import "../core/module.asm"
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#import "../libs/memory.asm"
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#import "../core/module.asm"
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.filenamespace Keyboard
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@ -145,6 +145,8 @@ init: {
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sta MemMap.VIDEO.CursorRow
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lda #%00000000
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sta MemMap.VIDEO.StatusBitsA
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lda #COLUMN_NUM
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sta MemMap.MATH.factor2
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rts
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}
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@ -186,86 +188,80 @@ scrollUp: {
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// A = Character to Print VIDEO ASCII
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// --------------------------------------------------------
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sendChar: {
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sei
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phx
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cmp #CR
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bne !+
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jsr screenNewLine
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iny
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jmp exit
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!:
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cmp #BS
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bne !+
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ldx MemMap.VIDEO.CursorCol
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cmp #0
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beq exit
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dec MemMap.VIDEO.CursorCol
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!:
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// Store Base Video Address 16 bit
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ldx #<VIDEO_ADDR // Low byte
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stx MemMap.VIDEO.TempVideoPointer
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ldx #>VIDEO_ADDR // High byte
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stx MemMap.VIDEO.TempVideoPointer+1
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sei
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phx
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cmp #CR
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bne notCR
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jsr screenNewLine
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iny
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jmp exit
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// Temp Save Y
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phy
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notCR:
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cmp #BS
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bne notBS
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ldx MemMap.VIDEO.CursorCol
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beq exit
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dec MemMap.VIDEO.CursorCol
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jmp storeBaseVideoAddress
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// CursorRow * 40
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ldy MemMap.VIDEO.CursorRow
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sty MemMap.MATH.factor1
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ldy #COLUMN_NUM
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sty MemMap.MATH.factor2
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jsr Math.multiply
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notBS:
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// Store Base Video Address 16 bit
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storeBaseVideoAddress:
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ldx #<VIDEO_ADDR // Low byte
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stx MemMap.VIDEO.TempVideoPointer
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ldx #>VIDEO_ADDR // High byte
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stx MemMap.VIDEO.TempVideoPointer+1
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// Add mul result to TempVideoPointer
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pha
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// CursorRow * 40
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ldy MemMap.VIDEO.CursorRow
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sty MemMap.MATH.factor1
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jsr Math.multiply
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clc
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lda MemMap.MATH.result
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adc MemMap.VIDEO.TempVideoPointer+1
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sta MemMap.VIDEO.TempVideoPointer+1
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lda MemMap.MATH.result+1
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adc MemMap.VIDEO.TempVideoPointer
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sta MemMap.VIDEO.TempVideoPointer
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// Add mul result to TempVideoPointer
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pha
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clc
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lda MemMap.MATH.result
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adc MemMap.VIDEO.TempVideoPointer+1
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sta MemMap.VIDEO.TempVideoPointer+1
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lda MemMap.MATH.result+1
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adc MemMap.VIDEO.TempVideoPointer
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sta MemMap.VIDEO.TempVideoPointer
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ldy MemMap.VIDEO.CursorCol
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cpy #COLUMN_NUM // Is this > col num?
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bcc noEndOfLine
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jsr screenNewLine // Yes? Add new line first
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ldy MemMap.VIDEO.CursorCol
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cpy #COLUMN_NUM // Is this > col num?
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bcc noEndOfLine
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jsr screenNewLine // Yes? Add new line first
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bitTest(%00000001, MemMap.VIDEO.StatusBitsA)
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bne noScrollTriggered
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lda MemMap.VIDEO.StatusBitsA
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and #%00000001
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beq noScrollTriggered
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// Compensate Scroll
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sec
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lda MemMap.VIDEO.TempVideoPointer
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sbc #40
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sta MemMap.VIDEO.TempVideoPointer
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bcs !+
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dec MemMap.VIDEO.TempVideoPointer+1
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!:
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// Compensate Scroll
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sec
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lda MemMap.VIDEO.TempVideoPointer
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sbc #40
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sta MemMap.VIDEO.TempVideoPointer
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bcs noScrollTriggered
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dec MemMap.VIDEO.TempVideoPointer+1
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noScrollTriggered:
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noEndOfLine:
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pla
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// This is a backspace
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cmp #BS
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bne !+
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lda #' '
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sta (MemMap.VIDEO.TempVideoPointer), y
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ply
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jmp exit
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!:
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// insert into screen
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sta (MemMap.VIDEO.TempVideoPointer), y
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ply
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iny
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inc MemMap.VIDEO.CursorCol
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noScrollTriggered:
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noEndOfLine:
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pla
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cmp #BS
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bne notBackspace
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lda #' '
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sta (MemMap.VIDEO.TempVideoPointer), y
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jmp exit
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exit:
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plx
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cli
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rts
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notBackspace:
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sta (MemMap.VIDEO.TempVideoPointer), y
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iny
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inc MemMap.VIDEO.CursorCol
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exit:
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plx
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cli
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rts
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}
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// --------------------------------------------------------
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@ -1,39 +1,45 @@
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#importonce
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.filenamespace Vic
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// VIC registers and constants
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// For more information, refer to:
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// https://www.c64-wiki.com/wiki/VIC
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// https://www.c64-wiki.com/wiki/Page_208-211
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// ========================================================
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// ////// CONSTANTS ///////////////////////////////////////
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// ========================================================
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// Base address for VIC registers
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.label VICREG = $D000
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.label VICREG = $D000
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// Control register 2
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.label CR2 = $D016
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.label CR2 = $D016 // Control register 2
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.label INTE = $D01A // Interrupt enabled
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.label RCNT = $D012 // Raster counter
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// Interrupt enabled register
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.label INTE = $D01A
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// Raster counter register
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.label RCNT = $D012
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* = * "VIC Functions"
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// Initialize the VIC registers with values from the tvic array
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init: {
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ldx #47
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px4:
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lda tvic-1, x
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sta VICREG-1, x
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dex
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bne px4
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rts
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ldx #47 // Set index to 47 (the number of bytes in tvic)
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load_loop: // Start of loop to load tvic values into VIC registers
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lda tvic-1, x // Load the byte from tvic at position x into the accumulator
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sta VICREG-1, x // Store the byte in the accumulator into the VIC register at position x
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dex // Decrement the index
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bne load_loop // If the index is not zero, repeat the loop
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rts // Return from subroutine
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}
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* = * "VIC Init Data"
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// Initial values for the VIC registers
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tvic:
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// The following bytes are loaded into the VIC registers in the init subroutine
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.byte $00, $00, $00, $00, $00, $00, $00, $00
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.byte $00, $00, $00, $00, $00, $00, $00, $00
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.byte $00, $9B, $37, $00, $00, $00, $08, $00
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.byte $14, $0F, $00, $00 ,$00, $00, $00, $00
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.byte $0E, $06, $01, $02, $03, $04, $00, $01
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.byte $02, $03, $04, $05, $06, $07, $4C
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@ -123,30 +123,31 @@ toDebug: {
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// copy
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// --------------------------------------------------------
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clone: {
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phr
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sei
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ldy #0
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ldx MemMap.MEMORY.size
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beq md2
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md1: lda (MemMap.MEMORY.from),y // move a page at a time
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sta (MemMap.MEMORY.dest),y
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iny
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bne md1
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inc MemMap.MEMORY.from+1
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inc MemMap.MEMORY.dest+1
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dex
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bne md1
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md2: ldx MemMap.MEMORY.size+1
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beq md4
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md3: lda (MemMap.MEMORY.from),y // move the remaining bytes
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sta (MemMap.MEMORY.dest),y
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iny
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dex
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bne md3
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cli
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md4:
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plr
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rts
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phr
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sei
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ldy #0
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ldx MemMap.MEMORY.size
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beq checkHighByte
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md1:
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lda (MemMap.MEMORY.from),y // move a page at a time
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sta (MemMap.MEMORY.dest),y
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iny
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bne md1
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inc MemMap.MEMORY.from+1
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inc MemMap.MEMORY.dest+1
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dex
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bne md1
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checkHighByte:
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ldx MemMap.MEMORY.size+1
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md3:
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lda (MemMap.MEMORY.from),y // move the remaining bytes
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sta (MemMap.MEMORY.dest),y
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iny
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dex
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bne md3
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cli
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plr
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rts
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}
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// --------------------------------------------------------
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@ -161,29 +162,22 @@ clone: {
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// A = The byte to fill memory with
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// --------------------------------------------------------
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fill: {
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phr
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sei
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ldy #0
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ldx MemMap.MEMORY.size
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beq md2
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md1:
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sta (MemMap.MEMORY.dest),y
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iny
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bne md1
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inc MemMap.MEMORY.dest+1
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dex
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bne md1
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md2: ldx MemMap.MEMORY.size+1
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beq md4
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md3:
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sta (MemMap.MEMORY.dest),y
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iny
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dex
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bne md3
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cli
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md4:
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plr
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rts
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phr
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sei
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ldy #0
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ldx MemMap.MEMORY.size
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cpx MemMap.MEMORY.size+1
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stx MemMap.MEMORY.size+1
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fillLoop:
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sta (MemMap.MEMORY.dest),y
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iny
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bne fillLoop
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inc MemMap.MEMORY.dest+1
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dex
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bne fillLoop
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cli
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plr
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rts
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}
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// Clear Memory with 0
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@ -87,6 +87,10 @@ printLine: {
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rts
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}
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// Hexadecimal lookup table
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hexTable: .text "0123456789ABCDEF"
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// --------------------------------------------------------
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// byteToHex -
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// Convert a byte to an HEX value
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@ -98,23 +102,22 @@ printLine: {
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// A = msn ascii char result
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// X = lns ascii char result
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// --------------------------------------------------------
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byteToHex: {
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pha
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jsr !+
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tax
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pla
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lsr
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lsr
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lsr
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lsr
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!: and #$0f
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cmp #$0a
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bcc !+
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adc #6
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!: adc #'0'
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rts
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byteToHex: {
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tay // Save the original byte in Y
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and #$0F // Mask the lower 4 bits (nibble)
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tax // Transfer the lower nibble to X register
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lda hexTable, x // Load the ASCII value of the least significant hex digit
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tya // Restore the original byte from Y
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lsr // Shift the upper 4 bits (nibble) to the right
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lsr
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lsr
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lsr
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tax // Transfer the upper nibble to X register
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pha // Push the ASCII value of the least significant hex digit to stack
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lda hexTable, x // Load the ASCII value of the most significant hex digit
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tax // Transfer the ASCII value of the most significant hex digit to X
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pla // Pop the ASCII value of the least significant hex digit from stack to A
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rts // Return from the function // Return from the function
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}
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// --------------------------------------------------------
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@ -45,26 +45,33 @@ toDebug: {
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// MemMap.MATH.result = 16 bit result
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// --------------------------------------------------------
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delayOne: {
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pha
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lda #$00
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sta MemMap.TIMERS.counter
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loop1: lda #$fb // wait for vertical retrace
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loop2: cmp $d012 // until it reaches 251th raster line ($fb)
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bne loop2 // which is out of the inner screen area
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inc MemMap.TIMERS.counter // increase frame counter
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lda MemMap.TIMERS.counter // check if counter
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cmp #$32 // reached 50
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bne out // if not, pass the color changing routine
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jmp exit
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pha
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lda #$00
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sta MemMap.TIMERS.counter
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out:
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lda $d012 // make sure we reached
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loop3: cmp $d012 // the next raster line so next time we
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beq loop3
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jmp loop1 // jump to main loop
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exit:
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pla
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rts
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loop1:
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lda #$fb // wait for vertical retrace
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loop2:
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cmp $d012 // until it reaches 251th raster line ($fb)
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beq waitForNextLine
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jmp loop2 // loop back if not yet at the 251th raster line
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waitForNextLine:
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lda $d012 // make sure we reached
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loop3:
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cmp $d012 // the next raster line so next time we
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beq loop1 // jump back to the main loop if still on the same raster line
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inc MemMap.TIMERS.counter // increase frame counter
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lda MemMap.TIMERS.counter // check if counter
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cmp #$32 // reached 50
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bne loop1 // if not, jump back to the main loop
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exit:
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pla
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rts
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}
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2
main.asm
2
main.asm
@ -1,6 +1,6 @@
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.cpu _6502
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BasicUpstart2(Boot.warmStart)
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//BasicUpstart2(Boot.warmStart)
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#import "./hardware/mem_map.asm"
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* = $8000 "Main"
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30
makefile
30
makefile
@ -1,22 +1,28 @@
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BUILD_PATH = ./bin
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KICKASS_BIN = /opt/develop/stid/c64/KickAssembler/KickAss.jar
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KICKASS_BIN = /Applications/KickAssembler/KickAss.jar
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PRG_FILE = ${BUILD_PATH}/main.prg
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CRT_FILE = ${BUILD_PATH}/woz.crt
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.PHONY: all build eprom clean run
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all: build
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build:
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java -jar ${KICKASS_BIN} -odir ${BUILD_PATH} -log ${BUILD_PATH}/buildlog.txt -showmem ./main.asm
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cartconv -t normal -name "woz" -i ${BUILD_PATH}/main.prg -o ${BUILD_PATH}/woz.crt
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build: ${PRG_FILE} ${CRT_FILE}
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eprom:
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java -jar ${KICKASS_BIN} -odir ${BUILD_PATH} -log ${BUILD_PATH}/buildlog.txt -showmem ./main.asm
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cartconv -t normal -name "woz" -i ${BUILD_PATH}/main.prg -o ${BUILD_PATH}/woz.crt
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cartconv -i ${BUILD_PATH}/woz.crt -o ${BUILD_PATH}/woz.bin
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eprom: ${PRG_FILE} ${CRT_FILE}
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cartconv -i ${CRT_FILE} -o ${BUILD_PATH}/woz.bin
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clean:
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rm -Rf ./bin
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rm -Rf $(BUILD_PATH)
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run:
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run: build
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x64sc $(CRT_FILE)
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${BUILD_PATH}:
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mkdir -p $(BUILD_PATH)
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${PRG_FILE}: ${BUILD_PATH}
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java -jar ${KICKASS_BIN} -odir ${BUILD_PATH} -log ${BUILD_PATH}/buildlog.txt -showmem ./main.asm
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cartconv -t normal -name "woz" -i ${BUILD_PATH}/main.prg -o ${BUILD_PATH}/woz.crt
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x64sc ${BUILD_PATH}/woz.crt
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${CRT_FILE}: ${PRG_FILE}
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cartconv -t normal -n "woz" -i $(PRG_FILE) -o $(CRT_FILE)
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