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https://github.com/irmen/ksim65.git
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display clock in demo
This commit is contained in:
Irmen de Jong
parent
b89d8bb755
commit
a40e545f61
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@ -6,6 +6,7 @@ import razorvine.ksim65.Cpu6502
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import razorvine.ksim65.Version
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import razorvine.ksim65.components.*
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import razorvine.ksim65.components.Timer
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import javax.swing.ImageIcon
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/**
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* A virtual computer constructed from the various virtual components
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@ -26,6 +27,9 @@ class VirtualMachine(title: String) {
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private val keyboard = Keyboard(0xd400, 0xd400, hostDisplay)
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init {
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hostDisplay.iconImage = ImageIcon(javaClass.getResource("/icon.png")).image
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debugWindow.iconImage = hostDisplay.iconImage
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ram[Cpu6502.RESET_vector] = 0x00
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ram[Cpu6502.RESET_vector + 1] = 0x10
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ram.loadPrg(javaClass.getResourceAsStream("/vmdemo.prg"))
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@ -58,7 +62,7 @@ class VirtualMachine(title: String) {
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val startTime = System.currentTimeMillis()
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timer.scheduleAtFixedRate(1, 1) {
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if(!paused) {
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repeat(5) {
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repeat(20) {
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stepInstruction()
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}
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debugWindow.updateCpu(cpu, ram)
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BIN
src/main/resources/icon.png
Normal file
BIN
src/main/resources/icon.png
Normal file
Binary file not shown.
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After Width: | Height: | Size: 17 KiB |
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@ -20,9 +20,9 @@ start
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sta IRQVEC
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lda #>irq
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sta IRQVEC+1
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lda #<1000
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sta TIMER+1 ; every 1000 clock cycles an irq
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lda #>1000
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lda #<2000
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sta TIMER+1 ; every 2000 clock cycles an irq
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lda #>2000
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sta TIMER+2
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lda #0
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sta TIMER+3
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@ -30,41 +30,23 @@ start
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sta TIMER+0
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cli ; enable irqs
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; ------- print stuff
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lda #10
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; ------- print 'c64' screen
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lda #4
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sta DISPLAY+8
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lda #1
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sta DISPLAY+9
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ldx #5
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printloop
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ldy #32
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printloop2
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sty DISPLAY+10
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iny
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bne printloop2
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dex
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bne printloop
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; ------- fill the screen
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ldx #0
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ldy #0
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fillscreen
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stx DISPLAY+0
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sty DISPLAY+1
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lda character
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sta DISPLAY+2 ; plot the char on the screen
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inc character
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inx
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cpx #80
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bne fillscreen
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ldx #0
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- lda _title1,y
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beq +
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sta DISPLAY+10
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iny
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cpy #30
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bne fillscreen
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bne -
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beq +
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; ------- clear the screen
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lda #$0c ; form feed (clear screen)
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sta DISPLAY+$0a
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_title1 .text "**** COMMODORE 64 BASIC V2 ****", 10, 10, " 64K RAM SYSTEM 38911 BASIC BYTES FREE", 10, 10, "READY.",10,0
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+
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; ------- draw pixel line
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pixelline
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@ -115,31 +97,6 @@ mousedraw
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jmp mousedraw
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;--------- RTC display TODO
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ldy #0
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lda #0
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sta DISPLAY+0
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sta DISPLAY+1
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rtcloop
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ldx #0
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readrtc
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lda RTC,x
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sta DISPLAY+2
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inc DISPLAY+0
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inx
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cpx #9
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bne readrtc
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lda #0
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sta DISPLAY+0
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iny
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sty DISPLAY+1
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cpy #20
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bne rtcloop
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done jmp done
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character .byte 0
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; ---------- irq routine
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@ -159,22 +116,72 @@ irq
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sty DISPLAY+1
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ldy #0
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sty DISPLAY+0
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- lda _time_msg,y
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beq +
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lda #<_time_msg
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ldy #>_time_msg
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jsr textout
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; read the clock now
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; YEAR
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lda RTC+0
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ldy RTC+1
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jsr HexToDec65535
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lda #<DecTenThousands
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ldy #>DecTenThousands
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jsr textout
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lda #'-'
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sta DISPLAY+2
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inc DISPLAY+0
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iny
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bne -
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+ ; read the clock now
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ldx #0
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- lda RTC,x
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clc
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adc #32
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; MONTH
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lda RTC+2
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jsr HexToDec99
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lda #<DecTens
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ldy #>DecTens
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jsr textout
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lda #'-'
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sta DISPLAY+2
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inc DISPLAY+0
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inx
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cpx #9
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bne -
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; DAY
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lda RTC+3
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jsr HexToDec99
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lda #<DecTens
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ldy #>DecTens
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jsr textout
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lda #'/'
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sta DISPLAY+2
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inc DISPLAY+0
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; HOUR
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lda RTC+4
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jsr HexToDec99
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lda #<DecTens
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ldy #>DecTens
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jsr textout
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lda #':'
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sta DISPLAY+2
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inc DISPLAY+0
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; MINUTE
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lda RTC+5
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jsr HexToDec99
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lda #<DecTens
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ldy #>DecTens
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jsr textout
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lda #':'
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sta DISPLAY+2
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inc DISPLAY+0
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; SECOND
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lda RTC+6
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jsr HexToDec99
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lda #<DecTens
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ldy #>DecTens
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jsr textout
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lda #'.'
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sta DISPLAY+2
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inc DISPLAY+0
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; MILLISECOND
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lda RTC+6
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ldy RTC+7
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jsr HexToDec65535
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lda #<DecTenThousands
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ldy #>DecTenThousands
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jsr textout
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pla
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sta DISPLAY+1
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@ -187,4 +194,227 @@ irq
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pla
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rti
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_time_msg .text "The time is: ",0
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_time_msg .text "The current date and time is: ",0
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; ----- routines
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textout
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sta _mod+1
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sty _mod+2
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ldy #0
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_mod lda $ffff,y ; modified
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beq +
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sta DISPLAY+2
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inc DISPLAY+0
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iny
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bne _mod
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+ rts
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ubyte2hex
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; ---- A to hex string in AY (first hex char in A, second hex char in Y)
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stx _save_x
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pha
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and #$0f
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tax
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ldy _hex_digits,x
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pla
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lsr a
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lsr a
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lsr a
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lsr a
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tax
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lda _hex_digits,x
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ldx _save_x
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rts
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_save_x .byte 0
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_hex_digits .text "0123456789abcdef" ; can probably be reused for other stuff as well
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uword2hex
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; ---- convert 16 bit uword in A/Y into 4-character hexadecimal string 'hex_output' (0-terminated)
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pha
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tya
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jsr ubyte2hex
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sta hex_output
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sty hex_output+1
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pla
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jsr ubyte2hex
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sta hex_output+2
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sty hex_output+3
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rts
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hex_output .text "0000", $00 ; 0-terminated output buffer (to make printing easier)
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;----------------------------------------------------------
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;Convert 16 bit Hex to Decimal (0-65535) Rev 2
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;By Omegamatrix
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;Further optimizations by tepples
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; routine from http://forums.nesdev.com/viewtopic.php?f=2&t=11341&start=15
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;
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;HexToDec99
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; start in A
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; end with A = 10's, decOnes
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;HexToDec255
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; start in A
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; end with Y = 100's, A = 10's, decOnes
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;HexToDec999
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; start with A = high byte, Y = low byte
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; end with Y = 100's, A = 10's, decOnes
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; requires 1 extra temp register on top of decOnes, could combine
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; these two if HexToDec65535 was eliminated...
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;HexToDec65535
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; start with A/Y (low/high) as 16 bit value
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; end with decTenThousand, decThousand, Y = 100's, A = 10's, decOnes
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; (irmen: I store Y and A in decHundreds and decTens too, so all of it can be easily printed)
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decTenThousands .byte 0
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decThousands .byte 0
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decHundreds .byte 0
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decTens .byte 0
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decOnes .byte 0
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.byte 0 ; zero-terminate the decimal output string
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ASCII_OFFSET = $30
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temp = $80 ; byte in zeropage
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hexHigh = $81 ; byte in zeropage
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hexLow = $82 ; byte in zeropage
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Mod100Tab
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.byte 0,56,12,56+12
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ShiftedBcdTab
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.byte $00,$01,$02,$03,$04,$08,$09,$0A,$0B,$0C
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.byte $10,$11,$12,$13,$14,$18,$19,$1A,$1B,$1C
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.byte $20,$21,$22,$23,$24,$28,$29,$2A,$2B,$2C
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.byte $30,$31,$32,$33,$34,$38,$39,$3A,$3B,$3C
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.byte $40,$41,$42,$43,$44,$48,$49,$4A,$4B,$4C
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HexToDec65535; SUBROUTINE
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sty hexHigh ;3 @9
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sta hexLow ;3 @12
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tya
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tax ;2 @14
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lsr ;2 @16
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lsr ;2 @18 integer divide 1024 (result 0-63)
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cpx #$A7 ;2 @20 account for overflow of multiplying 24 from 43,000 ($A7F8) onward,
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adc #1 ;2 @22 we can just round it to $A700, and the divide by 1024 is fine...
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;at this point we have a number 1-65 that we have to times by 24,
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;add to original sum, and Mod 1024 to get a remainder 0-999
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sta temp ;3 @25
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asl ;2 @27
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adc temp ;3 @30 x3
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tay ;2 @32
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lsr ;2 @34
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lsr ;2 @36
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lsr ;2 @38
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lsr ;2 @40
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lsr ;2 @42
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tax ;2 @44
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tya ;2 @46
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asl ;2 @48
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asl ;2 @50
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asl ;2 @52
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clc ;2 @54
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adc hexLow ;3 @57
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sta hexLow ;3 @60
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txa ;2 @62
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adc hexHigh ;3 @65
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sta hexHigh ;3 @68
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ror ;2 @70
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lsr ;2 @72
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tay ;2 @74 integer divide 1,000 (result 0-65)
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lsr ;2 @76 split the 1,000 and 10,000 digit
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tax ;2 @78
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lda ShiftedBcdTab,X ;4 @82
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tax ;2 @84
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rol ;2 @86
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and #$0F ;2 @88
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ora #ASCII_OFFSET
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sta decThousands ;3 @91
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txa ;2 @93
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lsr ;2 @95
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lsr ;2 @97
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lsr ;2 @99
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ora #ASCII_OFFSET
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sta decTenThousands ;3 @102
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lda hexLow ;3 @105
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cpy temp ;3 @108
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bmi _doSubtract ;2³ @110/111
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beq _useZero ;2³ @112/113
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adc #23 + 24 ;2 @114
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_doSubtract
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sbc #23 ;2 @116
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sta hexLow ;3 @119
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_useZero
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lda hexHigh ;3 @122
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sbc #0 ;2 @124
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Start100s
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and #$03 ;2 @126
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tax ;2 @128 0,1,2,3
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cmp #2 ;2 @130
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rol ;2 @132 0,2,5,7
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ora #ASCII_OFFSET
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tay ;2 @134 Y = Hundreds digit
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lda hexLow ;3 @137
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adc Mod100Tab,X ;4 @141 adding remainder of 256, 512, and 256+512 (all mod 100)
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bcs hex_doSub200 ;2³ @143/144
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hex_try200
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cmp #200 ;2 @145
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bcc hex_try100 ;2³ @147/148
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hex_doSub200
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iny ;2 @149
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iny ;2 @151
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sbc #200 ;2 @153
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hex_try100
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cmp #100 ;2 @155
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bcc HexToDec99 ;2³ @157/158
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iny ;2 @159
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sbc #100 ;2 @161
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HexToDec99; SUBROUTINE
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lsr ;2 @163
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tax ;2 @165
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lda ShiftedBcdTab,X ;4 @169
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tax ;2 @171
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rol ;2 @173
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and #$0F ;2 @175
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ora #ASCII_OFFSET
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sta decOnes ;3 @178
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txa ;2 @180
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lsr ;2 @182
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lsr ;2 @184
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lsr ;2 @186
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ora #ASCII_OFFSET
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; irmen: store Y and A too, for easy printing afterwards
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sty decHundreds
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sta decTens
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rts ;6 @192 A = tens digit
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HexToDec255; SUBROUTINE
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ldy #ASCII_OFFSET ;2 @8
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bne hex_try200 ;3 @11 always branch
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HexToDec999; SUBROUTINE
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sty hexLow ;3 @9
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jmp Start100s ;3 @12
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