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Fixed soft80 shutdown.

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A call to $FDA3 cannot be used because it re-enables the BASIC ROM. If a large program (such as Contiki's webbrowser80) has destructor code or data "behind" that ROM, then the program might crash when it tries to quit gracefully. Changing that code to set CIA2_PRA works well enough.
This commit is contained in:
Oliver Schmidt 2015-12-02 21:34:08 +01:00
parent d403c1e7f0
commit 377f31d085
1 changed files with 19 additions and 18 deletions
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37
libsrc/c64/soft80_conio.s
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@ -25,12 +25,12 @@ soft80_init:
; colorram being set up as expected, which is why we cant use the
; _bgcolor and _textcolor functions here.
lda CHARCOLOR ; use current textcolor
and #$0f ; make sure the upper nibble is 0s
lda CHARCOLOR ; use current textcolor
and #$0F ; make sure the upper nibble is 0s
sta CHARCOLOR
lda VIC_BG_COLOR0 ; use current bgcolor
and #$0f
lda VIC_BG_COLOR0 ; use current bgcolor
and #$0F
sta soft80_internal_bgcolor
asl a
asl a
@ -39,21 +39,22 @@ soft80_init:
ora CHARCOLOR
sta soft80_internal_cellcolor
lda #$3b
lda #$3B
sta VIC_CTRL1
lda #$00
sta CIA2_PRA
lda #$68
sta VIC_VIDEO_ADR
lda #$c8
lda #$C8
sta VIC_CTRL2
jmp soft80_kclrscr
soft80_shutdown:
jsr $fda3 ; Initialise I/O
jmp $ff5b ; Initialize screen editor
lda #$07
sta CIA2_PRA
jmp $FF5B ; Initialize video I/O
.segment "INIT"
firstinit:
@ -66,18 +67,18 @@ firstinit:
inc soft80_first_init
lda #>soft80_charset
sta ptr1+1
lda #<soft80_charset
ldx #>soft80_charset
sta ptr1
lda #>soft80_lo_charset
sta ptr2+1
stx ptr1+1
lda #<soft80_lo_charset
ldx #>soft80_lo_charset
sta ptr2
lda #>soft80_hi_charset
sta ptr3+1
stx ptr2+1
lda #<soft80_hi_charset
ldx #>soft80_hi_charset
sta ptr3
stx ptr3+1
ldx #4
@l2:
@ -99,12 +100,12 @@ firstinit:
bne @l2
; copy the kplot tables to ram under I/O
;ldx #0 ; is 0
;ldx #0 ; is 0
@l3:
lda soft80_tables_data_start,x
sta soft80_bitmapxlo,x
lda soft80_tables_data_start + (soft80_tables_data_end - soft80_tables_data_start - $100) ,x
sta soft80_bitmapxlo + (soft80_tables_data_end - soft80_tables_data_start - $100),x
lda soft80_tables_data_start + (soft80_tables_data_end - soft80_tables_data_start - $0100),x
sta soft80_bitmapxlo + (soft80_tables_data_end - soft80_tables_data_start - $0100),x
inx
bne @l3
@ -155,4 +156,4 @@ soft80_internal_cursorxlsb:
.data
soft80_first_init:
.byte 0 ; flag to check first init, this really must be in .data
.byte 0 ; flag to check first init, this really must be in .data