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First few nes files by groepaz

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git-svn-id: svn://svn.cc65.org/cc65/trunk@2056 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
2003-04-14 21:28:51 +00:00
parent 442df28524
commit 63b0537eb7
6 changed files with 403 additions and 8 deletions
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14
libsrc/c64/rs232.s
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@@ -325,7 +325,7 @@ _rs232_done:
; * function will return RS_ERR_NO_DATA, so this is not a fatal error.
; */
;
_rs232_get:
bit Initialized
bpl NotInitialized ; Jump if not initialized
@@ -342,7 +342,7 @@ _rs232_get:
; Check for buffer empty
@L2: lda RecvFreeCnt
@L2: lda RecvFreeCnt ; (25)
cmp #$ff
bne @L3
lda #RS_ERR_NO_DATA
@@ -351,7 +351,7 @@ _rs232_get:
; Check for flow stopped & enough free: release flow control
@L3: ldx Stopped
@L3: ldx Stopped ; (34)
beq @L4
cmp #63
bcc @L4
@@ -363,11 +363,11 @@ _rs232_get:
; Get byte from buffer
@L4: ldx RecvHead
@L4: ldx RecvHead ; (41)
lda RecvBuf,x
inc RecvHead
inc RecvFreeCnt
ldx #$00
ldx #$00 ; (59)
sta (ptr1,x)
txa ; Return code = 0
rts
@@ -532,7 +532,7 @@ _rs232_status:
NmiHandler:
pha
lda ACIA+RegStatus ;(4) ;status ;check for byte received
lda ACIA+RegStatus ;(4) ;status ;check for byte received
and #$08 ;(2)
beq @L9 ;(2*)
cld
@@ -540,7 +540,7 @@ NmiHandler:
pha
tya
pha
lda ACIA+RegStatus ;(4) opt ;status ;check for receive errors
lda ACIA+RegStatus ;(4) opt ;status ;check for receive errors
and #$07 ;(2) opt
beq @L1 ;(3*)opt
inc Errors ;(5^)opt