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Incorporated another round of feedback for pull request.

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Adjusted comment formatting in several assembler files.
Removed dummy kbhit() function, as it's better to get a linker
error than an implementation that does the wrong thing.
This commit is contained in:
Stephan Mühlstrasser 2015-02-18 18:38:42 +01:00
parent e178a33d29
commit 92e75e9df8
7 changed files with 23 additions and 35 deletions
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3
doc/osi.sgml
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@ -139,8 +139,7 @@ There are no loadable drivers available.
<sect1>conio implementation<p>
The conio implementation is complete except for a working kbhit() function.
kbhit() currently returns true unconditionally.
The conio implementation is complete except for a kbhit() function.
<sect1>stdio implementation<p>

2
libsrc/osic1p/chline.s
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@ -22,7 +22,7 @@ _chline:
cmp #0 ; Is the length zero?
beq L9 ; Jump if done
sta tmp1
L1: lda #$94 ; Horizontal line, screen code
L1: lda #$94 ; Horizontal line, screen code
jsr cputdirect ; Direct output
dec tmp1
bne L1

10
libsrc/osic1p/clrscr.s
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@ -12,7 +12,7 @@
BANKS = VIDEORAMSIZE / $100
_clrscr:
lda #$20 ;' '
lda #$20 ; ' '
ldy #BANKS
ldx #$00
staloc:
@ -22,10 +22,10 @@ staloc:
inc staloc+2
dey
bne staloc
lda #>(SCRNBASE); load high byte
sta staloc+2 ; restore base address
lda #>(SCRNBASE) ; Load high byte
sta staloc+2 ; Restore base address
lda #$00 ; cursor in upper left corner
lda #$00 ; Cursor in upper left corner
sta CURS_X
sta CURS_Y
jmp plot ; Set the cursor position
jmp plot ; Set the cursor position

18
libsrc/osic1p/crt0.s
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@ -7,8 +7,8 @@
.export _init, _exit
.import _main
.export __STARTUP__ : absolute = 1 ; Mark as startup
.import __RAM_START__, __RAM_SIZE__ ; Linker generated
.export __STARTUP__ : absolute = 1 ; Mark as startup
.import __RAM_START__, __RAM_SIZE__ ; Linker generated
.import zerobss, initlib, donelib
@ -24,9 +24,9 @@
; ---------------------------------------------------------------------------
; A little light 6502 housekeeping
_init: ldx #$FF ; Initialize stack pointer to $01FF
_init: ldx #$FF ; Initialize stack pointer to $01FF
txs
cld ; Clear decimal mode
cld ; Clear decimal mode
; ---------------------------------------------------------------------------
; Set cc65 argument stack pointer
@ -39,8 +39,8 @@ _init: ldx #$FF ; Initialize stack pointer to $01FF
; ---------------------------------------------------------------------------
; Initialize memory storage
jsr zerobss ; Clear BSS segment
jsr initlib ; Run constructors
jsr zerobss ; Clear BSS segment
jsr initlib ; Run constructors
; ---------------------------------------------------------------------------
; Call main()
@ -48,7 +48,7 @@ _init: ldx #$FF ; Initialize stack pointer to $01FF
jsr _main
; ---------------------------------------------------------------------------
; Back from main (this is also the _exit entry): force a software break
; Back from main (this is also the _exit entry):
_exit: jsr donelib ; Run destructors
jmp RESET ; Display boot menu after program exit
_exit: jsr donelib ; Run destructors
jmp RESET ; Display boot menu after program exit

2
libsrc/osic1p/cvline.s
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@ -21,7 +21,7 @@ _cvline:
cmp #0 ; Is the length zero?
beq L9 ; Jump if done
sta tmp1
L1: lda #$95 ; Vertical bar
L1: lda #$95 ; Vertical bar
jsr putchar ; Write, no cursor advance
jsr newline ; Advance cursor to next line
dec tmp1

11
libsrc/osic1p/kbhit.s
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@ -1,11 +0,0 @@
;
; int kbhit (void);
;
; Currently a dummy function that returns always true
.export _kbhit
_kbhit:
lda #$01 ; load low byte with true value
ldx #$00 ; load high byte
rts

12
libsrc/osic1p/osic1p.inc
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@ -1,9 +1,9 @@
; Addresses
SCRNBASE := $D000 ; Base of video RAM
INPUTC := $FD00 ; Input character from keyboard
RESET := $FF00 ; Reset address, show boot prompt
SCRNBASE := $D000 ; Base of video RAM
INPUTC := $FD00 ; Input character from keyboard
RESET := $FF00 ; Reset address, show boot prompt
; Other definitions
VIDEORAMSIZE = $0400 ; Size of C1P video RAM (1 kB)
SCR_LINELEN = $18 ; screen width - 1
SCR_HEIGHT = $18 ; screen height - 1
VIDEORAMSIZE = $0400 ; Size of C1P video RAM (1 kB)
SCR_LINELEN = $18 ; screen width - 1
SCR_HEIGHT = $18 ; screen height - 1