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Adding CBM510 support
git-svn-id: svn://svn.cc65.org/cc65/trunk@913 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
parent
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38
libsrc/cbm510/cgetc.s
Normal file
38
libsrc/cbm510/cgetc.s
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@ -0,0 +1,38 @@
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;
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; Ullrich von Bassewitz, 06.08.1998
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;
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; char cgetc (void);
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;
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.export _cgetc
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.import plot, write_crtc
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.import cursor
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.include "zeropage.inc"
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.include "page3.inc"
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; ------------------------------------------------------------------------
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.proc _cgetc
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L1: lda KeyIndex
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beq L1
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L2: ldx #$00 ; Get index
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ldy KeyBuf ; Get first character in the buffer
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sei
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L3: lda KeyBuf+1,x ; Move up the remaining chars
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sta KeyBuf,x
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inx
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cpx KeyIndex
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bne L3
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dec KeyIndex
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cli
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ldx #$00 ; High byte
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tya ; First char from buffer
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rts
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.endproc
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65
libsrc/cbm510/color.s
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65
libsrc/cbm510/color.s
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@ -0,0 +1,65 @@
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;
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; Ullrich von Bassewitz, 13.09.2001
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;
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.export _textcolor, _bgcolor, _bordercolor
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.import sys_bank, restore_bank
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.importzp vic
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.include "zeropage.inc"
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.include "io.inc"
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; ------------------------------------------------------------------------
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; unsigned char __fastcall__ textcolor (unsigned char color);
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; /* Set the color for text output. The old color setting is returned. */
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;
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.proc _textcolor
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ldx CHARCOLOR ; get old value
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sta CHARCOLOR ; set new value
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txa
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rts
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.endproc
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; ------------------------------------------------------------------------
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; unsigned char __fastcall__ bgcolor (unsigned char color);
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; /* Set the color for the background. The old color setting is returned. */
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;
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.proc _bgcolor
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jsr sys_bank ; Switch to the system bank
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pha ; Save new color
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ldy #VIC_BG_COLOR0
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lda (vic),y ; Get current color...
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tax ; ...into X
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pla ; Get new color
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sta (vic),y ; Set new color
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txa ; Get old color into X
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jmp restore_bank ; Restore the old color
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.endproc
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; ------------------------------------------------------------------------
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; unsigned char __fastcall__ bordercolor (unsigned char color);
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; /* Set the color for the border. The old color setting is returned. */
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.proc _bordercolor
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jsr sys_bank ; Switch to the system bank
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pha ; Save new color
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ldy #VIC_BORDERCOLOR
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lda (vic),y ; Get current color...
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tax ; ...into X
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pla ; Get new color
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sta (vic),y ; Set new color
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txa ; Get old color into X
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jmp restore_bank ; Restore the old color
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.endproc
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@ -95,10 +95,10 @@ cia: .word $dc00
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acia: .word $dd00
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tpi1: .word $de00
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tpi2: .word $df00
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ktab1: .word $ea29
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ktab2: .word $ea89
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ktab3: .word $eae9
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ktab4: .word $eb49
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ktab1: .word $eab1
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ktab2: .word $eb11
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ktab3: .word $eb71
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ktab4: .word $ebd1
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time: .dword $0000
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RecvBuf: .word $0100 ; RS232 received buffer
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SendBuf: .word $0200 ; RS232 send buffer
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@ -244,7 +244,7 @@ Z4:
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jsr push0 ; argc
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jsr push0 ; argv
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; Execute the program code
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; Execute the program code
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jmp Start
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100
libsrc/cbm510/kirq.s
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100
libsrc/cbm510/kirq.s
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@ -0,0 +1,100 @@
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;
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; Ullrich von Bassewitz, 28.09.1998
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;
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; IRQ routine for the 510.
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;
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.export irq, nmi, k_irq, k_nmi
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.import k_scnkey, k_udtim, k_rs232
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.importzp tpi1
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.include "zeropage.inc"
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.include "io.inc"
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.include "page3.inc"
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; -------------------------------------------------------------------------
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; This is the mapping of the active irq register of the 6525 (tpi1):
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;
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; Bit 7 6 5 4 3 2 1 0
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; | | | | ^ 50 Hz
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; | | | ^ SRQ IEEE 488
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; | | ^ cia
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; | ^ IRQB ext. Port
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; ^ acia
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; -------------------------------------------------------------------------
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; IRQ entry point
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.proc irq
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pha
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txa
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pha
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tya
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pha
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tsx
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lda $104,x ; Get the flags from the stack
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and #$10 ; Test break flag
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bne L1
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jmp (IRQVec)
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L1: jmp (BRKVec)
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.endproc
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; -------------------------------------------------------------------------
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; NMI entry point
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.proc nmi
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jmp (NMIVec)
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.endproc
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; -------------------------------------------------------------------------
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; Kernal irq entry point. The IRQvec points here (usually).
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k_irq:
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lda IndReg ; Ind. Segment retten
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pha
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cld
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lda #$0F
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sta IndReg
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ldy #tpiActIntReg
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lda (tpi1),y ; Interrupt Register 6525
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beq noirq
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; -------------------------------------------------------------------------
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; 50/60Hz interrupt
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cmp #%00000001 ; ticker irq?
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bne irq1
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jsr k_scnkey ; Poll the keyboard
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jsr k_udtim ; Bump the time
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; -------------------------------------------------------------------------
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; UART interrupt
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irq1: cmp #%00010000 ; interrupt from uart?
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bne irqend
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jsr k_rs232 ; Read character from uart
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; -------------------------------------------------------------------------
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; Done
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irqend: ldy #tpiActIntReg
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sta (tpi1),y ; Clear interrupt
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noirq: pla
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sta IndReg
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pla
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tay
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pla
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tax
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pla
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k_nmi: rti
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146
libsrc/cbm510/kscnkey.s
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146
libsrc/cbm510/kscnkey.s
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@ -0,0 +1,146 @@
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;
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; Ullrich von Bassewitz, 13.09.2001
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;
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; Keyboard polling stuff for the 510.
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;
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.export k_scnkey
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.importzp tpi2, ktab1, ktab2, ktab3, ktab4
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.include "zeropage.inc"
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.include "io.inc"
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.include "page3.inc"
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.proc k_scnkey
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lda #$FF
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sta ModKey
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sta NorKey
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lda #$00
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sta KbdScanBuf
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ldy #tpiPortB
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sta (tpi2),y
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ldy #tpiPortA
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sta (tpi2),y
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jsr Poll
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and #$3F
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eor #$3F
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bne L1
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jmp NoKey
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L1: lda #$FF
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ldy #tpiPortA
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sta (tpi2),y
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asl a
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ldy #tpiPortB
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sta (tpi2),y
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jsr Poll
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pha
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sta ModKey
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ora #$30
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bne L3 ; Branch always
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L2: jsr Poll
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L3: ldx #$05
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ldy #$00
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L4: lsr a
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bcc L5
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inc KbdScanBuf
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dex
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bpl L4
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sec
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ldy #tpiPortB
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lda (tpi2),y
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rol a
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sta (tpi2),y
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ldy #tpiPortA
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lda (tpi2),y
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rol a
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sta (tpi2),y
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bcs L2
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pla
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bcc NoKey ; Branch always
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L5: ldy KbdScanBuf
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sty NorKey
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pla
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asl a
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asl a
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asl a
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bcc L6
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bmi L7
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lda (ktab2),y ; Shifted normal key
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ldx GrafMode
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beq L8
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lda (ktab3),y ; Shifted key in graph mode
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bne L8
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L6: lda (ktab4),y ; Key with ctrl pressed
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bne L8
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L7: lda (ktab1),y ; Normal key
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L8: tax
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cpx #$FF ; Valid key?
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beq Done
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cpy LastIndex
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beq Repeat
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ldx #$13
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stx RepeatDelay
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ldx KeyIndex
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cpx #$09
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beq NoKey
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cpy #$59
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bne PutKey
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cpx #$08
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beq NoKey
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sta KeyBuf,x
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inx
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bne PutKey
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NoKey: ldy #$FF
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Done: sty LastIndex
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End: lda #$7F
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ldy #tpiPortA
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sta (tpi2),y
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ldy #tpiPortB
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lda #$FF
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sta (tpi2),y
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rts
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Repeat: dec RepeatDelay
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bpl End
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inc RepeatDelay
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dec RepeatCount
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bpl End
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inc RepeatCount
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ldx KeyIndex
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bne End
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PutKey: sta KeyBuf,x
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inx
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stx KeyIndex
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ldx #$03
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stx RepeatCount
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bne Done
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.endproc
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; Poll the keyboard port until it's stable
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.proc Poll
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ldy #tpiPortC
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L1: lda (tpi2),y
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sta KeySave
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lda (tpi2),y
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cmp KeySave
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bne L1
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rts
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.endproc
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.bss
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KeySave: .res 1
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94
libsrc/cbm510/page3.inc
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94
libsrc/cbm510/page3.inc
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@ -0,0 +1,94 @@
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;
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; Page 3 variables for the CBM 610
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;
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; Taken from a kernal disassembly done by myself in 1987.
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;
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; Ullrich von Bassewitz, 28.09.1998
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;
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; system ram vectors
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;
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IRQVec = $0300
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BRKVec = $0302
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NMIVec = $0304
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openVec = $0306
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closeVec = $0308
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chkinVec = $030A
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ckoutVec = $030C
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clrchVec = $030E
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basinVec = $0310
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bsoutVec = $0312
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stopVec = $0314
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getinVec = $0316
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clallVec = $0318
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loadVec = $031A
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saveVec = $031C
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usrcmd = $031E
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escvec = $0320
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ctrlvec = $0322
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secndVec = $0324
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tksaVec = $0326
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acptrVec = $0328
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cioutVec = $032A
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untlkVec = $032C
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unlsnVec = $032E
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listnVec = $0330
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talkVec = $0332
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;
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;
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;
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LogicalAdrTable = $0334
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FirstAdrTable = $033E
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SecondAdrTable = $0348
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SysMemBot = $0352
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SysMemTop = $0355
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UsrMemBot = $0358
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UsrMemTop = $035B
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TimOut = $035E
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VerifyFlag = $035F
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DevTabIndex = $0360
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MsgFlag = $0361
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CassBufPtr = $0362
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t1 = $0363
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t2 = $0364
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XSave = $0365
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SaveX = $0366
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SaveXt = $0367
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temp = $0368
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alarm = $0369
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TapeVec = $036A
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LoadStAdr = $036F
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CassMotFlag = $0375
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m6551Ctrl = $0376
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m6551Cmd = $0377
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rs232status = $037A
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dcddsr = $037B
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rs232head = $037C
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rs232tail = $037D
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PgmKeyEnd = $0380
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PgmKeySeg = $0382
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PgmKeySize = $0383
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rvsFlag = $0397
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linetmp = $0398
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LastPrtChar = $0399
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InsertFlag = $039A
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ScrollFlag = $039B
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FktTemp = $039C
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PgmKeyIdx = $039D
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LogScrollFlag = $039E
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BellMode = $039F ; Bell on/off 00 = an
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SegSave = $03A0
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TabStopTable = $03A1 ; 80 bits for tabstops
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KeyBuf = $03AB ; Keyboard buffer
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funvec = $03B5 ; Vector for function key handline
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FunKeyTmp = $03B7
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sedt3 = $03B9
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MoniSegSave = $03f0
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wstvec = $03F8
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WstFlag = $03FA ; Warm start flag
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49
libsrc/cbm510/pokesys.s
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49
libsrc/cbm510/pokesys.s
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@ -0,0 +1,49 @@
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;
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; Ullrich von Bassewitz, 13.09.2001
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;
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; void pokebsys (unsigned Addr, unsigned char Val);
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; void pokewsys (unsigned Addr, unsigned Val);
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.export _pokebsys, _pokewsys
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.import popsreg
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.importzp sreg, tmp1
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.include "zeropage.inc"
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; ------------------------------------------------------------------------
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;
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.proc _pokebsys
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jsr popsreg ; Get the address
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ldx IndReg
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ldy #$0F
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sty IndReg ; Switch to the system bank
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ldy #$00
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sta (sreg),y
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stx IndReg
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rts
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.endproc
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; ------------------------------------------------------------------------
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;
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.proc _pokewsys
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stx tmp1 ; Save high byte
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jsr popsreg ; Get the address
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ldx IndReg
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ldy #$0F
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sty IndReg ; Switch to the system bank
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ldy #$00
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sta (sreg),y
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iny
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lda tmp1
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sta (sreg),y
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stx IndReg
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rts
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.endproc
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@ -98,7 +98,7 @@ BlinkCounter = $E7
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ColorRamPtr = $E8
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TempColor = $EA
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BlinkSwitch = $EB
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CharColor = $EC
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CHARCOLOR = $EC
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CursBackColor = $ED ; Color behind cursor
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OutCharTmp = $EE
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ScreenSeq = $EF ; Segment of video RAM
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