mirror of
https://github.com/KrisKennaway/ii-vision.git
synced 2024-06-26 00:29:29 +00:00
Introduce a 7-byte video header and use it to select between HGR and
DHGR playback modes. Actually the only difference is whether to initialize (D)HGR display since everything else is steered by the video stream. 6 of these bytes are currently unused, but it is convenient to pad to the same length as the TICK opcode so that it does not complicate the ACK stream framing. Move towards the convention of using upper-case labels for system use (soft switches etc) and lower-case for program use.
This commit is contained in:
kris
parent
aaf56e6ec5
commit
6bde085d5e
312
player/main.s
312
player/main.s
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@ -51,16 +51,36 @@ WDATA = $C097
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;;;
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headerlen = $07 ; video header length
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; some dummy addresses in order to pad cycle counts
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zpdummy = $08
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dummy = $ffff
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hgr = $f3e2
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fullscr = $c052
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tick = $c030 ; where the magic happens
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ptr = $06 ; TODO: we only use this for connection retry count
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prodos = $BF00 ; ProDOS MLI entry point
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reset_vector = $3F2 ; Reset vector
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; soft-switches
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KBD = $C000
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STORE80ON = $C001
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COL80ON = $C00D
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KBDSTRB = $C010
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TICK = $C030 ; where the magic happens
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TEXTOFF = $C050
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FULLSCR = $C052
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PAGE2OFF = $C054
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PAGE2ON = $C055
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HIRESON = $C057
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DHIRESON = $C05E
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; MONITOR SUBROUTINES
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HGR = $F3E2
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HGR0 = $F3EA ; internal entry point within HGR that doesn't set soft-switches
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COUT = $FDED
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PRBYTE = $FDDA
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PRNTAX = $F941
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PRODOS = $BF00 ; ProDOS MLI entry point
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RESET_VECTOR = $3F2 ; Reset vector
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; W5100 LOCATIONS
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MACADDR = $0009 ; MAC ADDRESS
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@ -96,16 +116,6 @@ SCRECV = $40 ; RECV
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STINIT = $13
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STESTABLISHED = $17
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; MONITOR SUBROUTINES
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KBD = $C000
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KBDSTRB = $C010
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COUT = $FDED
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PRBYTE = $FDDA
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PRNTAX = $F941
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; ZERO-PAGE STORAGE
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PTR = $06 ; TODO: we only use this for connection retry count
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; this is the main binary entrypoint (it will be linked at 0x800)
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.segment "LOWCODE"
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JMP bootstrap
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@ -118,16 +128,16 @@ PTR = $06 ; TODO: we only use this for connection retry count
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bootstrap:
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; install reset handler
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LDA #<exit
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STA reset_vector
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STA RESET_VECTOR
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LDA #>exit
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STA reset_vector+1
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STA RESET_VECTOR+1
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EOR #$A5
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STA reset_vector+2 ; checksum to ensure warm-start reset
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STA RESET_VECTOR+2 ; checksum to ensure warm-start reset
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LDA #6 ; 5 RETRIES TO GET CONNECTION
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STA PTR ; NUMBER OF RETRIES
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STA ptr ; NUMBER OF RETRIES
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RESET_W5100:
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reset_w5100:
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LDA #$80 ; reset
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STA WMODE
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LDA #3 ; CONFIGURE WITH AUTO-INCREMENT
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@ -239,15 +249,15 @@ CHECKTEST:
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LDA WDATA ; GET SOCKET STATUS
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BEQ FAILED ; 0 = SOCKET CLOSED, ERROR
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CMP #STESTABLISHED
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BEQ SETUP ; SUCCESS
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BEQ wait_read_header ; SUCCESS
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BNE CHECKTEST
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FAILED:
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DEC PTR
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DEC ptr
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BEQ ERRDONE ; TOO MANY FAILURES
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LDA #$AE ; "."
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JSR COUT
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JMP RESET_W5100 ; TRY AGAIN
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JMP reset_w5100 ; TRY AGAIN
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ERRDONE:
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LDY #0
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@ -263,50 +273,76 @@ ERRMSG: .byte $d3,$cf,$c3,$cb,$c5,$d4,$a0,$c3,$cf,$d5,$cc,$c4,$a0,$ce,$cf,$d4,$a
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; "SOCKET COULD NOT CONNECT - CHECK REMOTE HOST"
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.byte $8D,$00
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SETUP:
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wait_read_header:
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LDA #<S0RXRSR ; Socket 0 Received Size register
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STA WADRL ;
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LDA WDATA ; High byte of received size
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CMP #$01 ; expect at least 256 bytes
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BCS op_header ; There is enough data...we don't care exactly how much
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; TODO: Read header from video
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; TODO: Not sure whether this delay is needed?
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NOP ; Little delay ...
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NOP
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JMP wait_read_header ; Check again
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JMP init_mainloop
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op_header:
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; Point to socket 0 buffer
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LDA #>RXBASE
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STA WADRH
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LDA #<RXBASE
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STA WADRL
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; read video header
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; consume 6 padding bytes from HEADER opcode.
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; TODO: implement version header so we won't try to play a video for an incompatible
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; player version.
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LDA WDATA
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LDA WDATA
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LDA WDATA
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LDA WDATA
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LDA WDATA
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LDA WDATA
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JMP _op_header_hgr
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.segment "CODE"
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; Quit to ProDOS
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exit:
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INC reset_vector+2 ; Invalidate power-up byte
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JSR prodos ; Call the MLI ($BF00)
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.BYTE $65 ; CALL TYPE = QUIT
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.ADDR exit_parmtable ; Pointer to parameter table
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; Initialize (D)HGR in the CODE segment so we don't accidentally toast ourselves when
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; erasing HGR
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_op_header_hgr:
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LDA WDATA ; Video mode
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BEQ @1 ; 0 = HGR mode
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exit_parmtable:
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.BYTE 4 ; Number of parameters is 4
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.BYTE 0 ; 0 is the only quit type
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.WORD 0000 ; Pointer reserved for future use
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.BYTE 0 ; Byte reserved for future use
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.WORD 0000 ; Pointer reserved for future use
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; TODO: clear screen before displaying it to look cleaner
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; DHGR mode
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init_mainloop:
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JSR hgr ; nukes the startup code we placed in HGR segment
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STA $C050 ; GRAPHICS
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STA $C057 ; HIRES
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STA $C05E ; DHR
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STA $C00D ; 80 COLUMN MODE
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STA $C001 ; 80STOREON
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STA TEXTOFF ; XXX move later
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STA HIRESON
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STA DHIRESON
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STA COL80ON
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STA STORE80ON
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; Clear aux screen
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STA $C055 ;
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STA PAGE2ON ; AUX memory active
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; Co-opt HGR internals to clear AUX for us.
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LDA #$20
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JSR $F3EA
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JSR HGR0
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STA fullscr
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STA PAGE2OFF ; MAIN memory active
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STA $C054 ; MAIN memory active
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@1:
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JSR HGR ; nukes the startup code we placed in HGR segment
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STA FULLSCR
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; establish invariants expected by decode loop
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LDY #>RXBASE ; High byte of socket 0 receive buffer
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LDX #$00
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LDX #headerlen ; End of header
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LDA #>S0RXRSR
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STA WADRH
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; fall through
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; This is the main audio/video decode loop.
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;
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@ -338,7 +374,7 @@ init_mainloop:
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; 14364 Hz "carrier" for the audio DAC, which is slightly audible (at least to my ageing
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; ears) but quite acceptable.
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;
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; i.e. we get about 14364 player opcodes/second, with the op_ack + CHECKRECV + op_nop
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; i.e. we get about 14364 player opcodes/second, with the op_ack + checkrecv + op_nop
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; "slow path" costing 2 opcodes. Each of the "fat" audio/video opcodes results in storing
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; 4 video bytes, so we store about 56KB of video data per second.
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;
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@ -354,30 +390,30 @@ init_mainloop:
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; X = 0
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; Y register has the high byte of the W5100 address pointer in the RX socket code, so we
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; can't trash this until we are ready to point back there.
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CHECKRECV:
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BIT tick ; 4
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checkrecv:
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BIT TICK ; 4
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LDA #<S0RXRSR ; 2 Socket 0 Received Size register
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STA WADRL ; 4
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LDA WDATA ; 4 High byte of received size
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CMP #$08 ; 2 expect at least 2k
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; TODO: check this doesn't cross a page bdy or it will add a cycle
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BCS RECV ; 3 There is data...we don't care exactly how much because it's at least 2K
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BCS recv ; 3 There is data...we don't care exactly how much because it's at least 2K
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; TODO: Not sure whether this delay is needed?
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NOP ; Little delay ...
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NOP
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JMP CHECKRECV ; Check again
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JMP checkrecv ; Check again
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; There is data to read - restore W5100 address pointer where we last found it
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;
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; It turns out that the W5100 automatically wraps the address pointer at the end of the 8K RX/TX buffers
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; Since we're using an 8K socket, that means we don't have to do any work to manage the read pointer!
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RECV: ; 15 cycles so far
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recv: ; 15 cycles so far
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; point W5100 back into the RX buffer where we left off in op_ack
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STY WADRH ; 4
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STX WADRL ; 4 X=0 here from op_ack
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STX WADRL ; 4 normally X=0 here from op_ack except during first frame when we have just read the header.
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; Check for keypress and pause the video
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@0: BIT KBD ; 4
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@ -393,10 +429,12 @@ RECV: ; 15 cycles so far
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; fall through - tick timings don't matter
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; pad cycles to keep ticking on 36/37 cycle cadence
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; TODO: what can we do with the luxury of 16 unused cycles?!
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; TODO: what can we do with the luxury of 14 unused cycles?!
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@2: ; 30 so far
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NOP ; 2
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BIT tick ; 4 ; 36
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; X will usually already be 0 from op_ack except during first frame when reading
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; header but reset it unconditionally
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LDX #$00 ; 2
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BIT TICK ; 4 ; 36
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NOP ; 2
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STA dummy ; 4
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@ -420,7 +458,7 @@ op_nop:
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; - read 2 bytes from the stream as address of next opcode
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;
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; Each opcode has 6 cycles of padding, which is necessary to support reordering things to
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; get the second "BIT tick" at the right cycle offset.
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; get the second "BIT TICK" at the right cycle offset.
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;
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; Where possible we share code by JMPing to a common tail instruction sequence in one of the
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; earlier opcodes. This is critical for reducing code size enough to fit.
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@ -436,8 +474,8 @@ op_nop:
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.macro op_tick_4 page
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;4+(4)+2+4+4+4+5+4+5+4+5+4+5+4+4+4+4+3=73
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.ident (.concat ("op_tick_4_page_", .string(page))):
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BIT tick ; 4
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BIT tick ; 4
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BIT TICK ; 4
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BIT TICK ; 4
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STA zpdummy ; 3
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STA zpdummy ; 3
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@ -480,9 +518,9 @@ tickident page, 7
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.macro op_tick_6 page
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;4+(2+4)+3+4+4+5+4+5+4+5+4+5+4+4+4+5+3
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.ident (.concat ("op_tick_6_page_", .string(page))):
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BIT tick ; 4
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BIT TICK ; 4
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NOP ; 2
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BIT tick ; 4
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BIT TICK ; 4
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STA zpdummy ; 3
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@ -525,9 +563,9 @@ tickident page, 8
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.macro op_tick_8 page
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;4+(4+4)+3+3+55
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.ident (.concat ("op_tick_8_page_", .string(page))):
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BIT tick ; 4
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BIT TICK ; 4
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LDA WDATA ; 4
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BIT tick ; 4
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BIT TICK ; 4
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STA zpdummy ; 3
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JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_55")) ; 3 + 55
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@ -536,10 +574,10 @@ tickident page, 8
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.macro op_tick_10 page
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;4+(4+2+4)+3+56
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.ident (.concat ("op_tick_10_page_", .string(page))):
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BIT tick ; 4
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BIT TICK ; 4
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LDA WDATA ; 4
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NOP ; 2
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BIT tick ; 4
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BIT TICK ; 4
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JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_56")) ; 3 + 56
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.endmacro
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@ -547,10 +585,10 @@ tickident page, 8
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.macro op_tick_12 page
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;4+(4+4+4)+3+3+51
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.ident (.concat ("op_tick_12_page_", .string(page))):
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BIT tick ; 4
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BIT TICK ; 4
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LDA WDATA ; 4
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LDY WDATA ; 4
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BIT tick ; 4
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BIT TICK ; 4
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STA zpdummy ; 3
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JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_51")) ; 3 + 51
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@ -559,11 +597,11 @@ tickident page, 8
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.macro op_tick_14 page
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;4+(4+4+2+4)+3+52
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.ident (.concat ("op_tick_14_page_", .string(page))):
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BIT tick ; 4
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BIT TICK ; 4
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LDA WDATA ; 4
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LDY WDATA ; 4
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NOP ; 2
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BIT tick ; 4
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BIT TICK ; 4
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JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_52")) ; 3+52
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.endmacro
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@ -571,14 +609,14 @@ tickident page, 8
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.macro op_tick_16 page
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; 4+(4+4+4+4)+5+2+3+43
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.ident (.concat ("op_tick_16_page_", .string(page))):
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BIT tick ; 4
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BIT TICK ; 4
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LDA WDATA ; 4
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; This temporarily violates X=0 invariant required by tick_6, but lets us share a
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; common opcode tail; otherwise we need a dummy 4-cycle opcode between the ticks, which
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; doesn't leave enough to JMP with.
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LDX WDATA ; 4
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LDY WDATA ; 4
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BIT tick ; 4
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BIT TICK ; 4
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STA page << 8,x ; 5
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LDX #$00 ; 2 restore X=0 invariant
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@ -589,14 +627,14 @@ tickident page, 8
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.macro op_tick_18 page
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; 4 + (4+4+4+2+4)+5+5+2+2+4+5+4+5+4+4+4+4+3
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.ident (.concat ("op_tick_18_page_", .string(page))):
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BIT tick ; 4
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BIT TICK ; 4
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LDA WDATA ; 4
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LDY WDATA ; 4
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; lets us reorder the 5-cycle STA page << 8,y outside of tick loop.
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; This temporarily violates X=0 invariant required by tick_6
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LDX WDATA ; 4
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NOP ; 2
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BIT tick ; 4
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BIT TICK ; 4
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STA page << 8,Y ; 5
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STA page << 8,X ; 5
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@ -623,12 +661,12 @@ tickident page, 8
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.macro op_tick_20 page
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;4+(4+4+5+3+4)+3+46=73
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.ident (.concat ("op_tick_20_page_", .string(page))):
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BIT tick ; 4
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BIT TICK ; 4
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LDA WDATA ; 4
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LDY WDATA ; 4
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STA page << 8,Y ; 5
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STA zpdummy ; 3
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BIT tick ; 4
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BIT TICK ; 4
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JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_46"))
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.endmacro
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@ -637,12 +675,12 @@ tickident page, 8
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.macro op_tick_22 page
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; 4+(4+4+5+4+4)+3+3+42
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.ident (.concat ("op_tick_22_page_", .string(page))):
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BIT tick ; 4
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BIT TICK ; 4
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LDA WDATA ; 4
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LDY WDATA ; 4
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STA page << 8,Y ; 5
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LDY WDATA ; 4
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BIT tick ; 4
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BIT TICK ; 4
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STA zpdummy ; 3
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JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_42")) ; 3 + 42
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@ -651,13 +689,13 @@ tickident page, 8
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.macro op_tick_24 page
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;4+(4+4+5+4+3+4)+3+42
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.ident (.concat ("op_tick_24_page_", .string(page))):
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BIT tick ; 4
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BIT TICK ; 4
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LDA WDATA ; 4
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LDY WDATA ; 4
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STA page << 8,Y ; 5
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LDY WDATA ; 4
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STA zpdummy ; 3
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BIT tick ; 4
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BIT TICK ; 4
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JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_42"))
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.endmacro
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@ -665,13 +703,13 @@ tickident page, 8
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.macro op_tick_26 page ; pattern repeats from op_tick_8
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; 4+(4+4+5+4+5+4)+3+37
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.ident (.concat ("op_tick_26_page_", .string(page))):
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BIT tick ; 4
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BIT TICK ; 4
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LDA WDATA ; 4
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LDY WDATA ; 4
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STA page << 8,Y ; 5
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LDY WDATA ; 4
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STA page << 8,Y ; 5
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BIT tick; 4
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BIT TICK; 4
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STA zpdummy ; 3
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JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_37")) ; 3 + 37
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@ -680,14 +718,14 @@ tickident page, 8
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.macro op_tick_28 page ; pattern repeats from op_tick_10
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; 4+(4+2+4+5+4+5+4)+3+38
|
||||
.ident (.concat ("op_tick_28_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
NOP ; 2
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_38"))
|
||||
.endmacro
|
||||
|
|
@ -695,14 +733,14 @@ tickident page, 8
|
|||
.macro op_tick_30 page ; pattern repeats from op_tick_12
|
||||
;4+(4+4+5+4+5+4+4)+3+3+33
|
||||
.ident (.concat ("op_tick_30_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
LDY WDATA ; 4
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
STA zpdummy ; 3
|
||||
JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_33")) ; 3 + 33
|
||||
|
|
@ -711,7 +749,7 @@ tickident page, 8
|
|||
.macro op_tick_32 page ; pattern repeats from op_tick_14
|
||||
;4+(4+4+5+4+5+4+2+4)+3+34
|
||||
.ident (.concat ("op_tick_32_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -719,7 +757,7 @@ tickident page, 8
|
|||
STA page << 8,Y ; 5
|
||||
LDY WDATA ; 4
|
||||
NOP ; 2
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_34"))
|
||||
.endmacro
|
||||
|
|
@ -727,7 +765,7 @@ tickident page, 8
|
|||
.macro op_tick_34 page ; pattern repeats from op_tick_16
|
||||
; 4+(4+4+5+4+5+4+4+4)+2+5+5+3+20
|
||||
.ident (.concat ("op_tick_34_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -735,7 +773,7 @@ tickident page, 8
|
|||
STA page << 8,Y ; 5
|
||||
LDY WDATA ; 4
|
||||
LDX WDATA ; 4 ; allows reordering STA ...,X outside ticks
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
STA page << 8,Y ; 5
|
||||
STA page << 8,X ; 5
|
||||
|
|
@ -748,7 +786,7 @@ tickident page, 8
|
|||
.macro op_tick_36 page ; pattern repeats from op_tick_18
|
||||
;4+(4+4+5+4+5+4+4+2+4)+5+5+2+2+4+4+4+4+3
|
||||
.ident (.concat ("op_tick_36_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -757,7 +795,7 @@ tickident page, 8
|
|||
LDY WDATA ; 4
|
||||
LDX WDATA ; 4
|
||||
NOP ; 2
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
STA page << 8,Y ; 5
|
||||
STA page << 8,X ; 5
|
||||
|
|
@ -776,7 +814,7 @@ tickident page, 8
|
|||
.macro op_tick_38 page ; pattern repeats from op_tick_20
|
||||
; 4 + (4+4+5+4+5+4+5+3+4)+3+28
|
||||
.ident (.concat ("op_tick_38_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -785,7 +823,7 @@ tickident page, 8
|
|||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
STA zpdummy ; 3
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_28")) ; 3 + 28
|
||||
.endmacro
|
||||
|
|
@ -794,7 +832,7 @@ tickident page, 8
|
|||
.macro op_tick_40 page ; pattern repeats from op_tick_22
|
||||
;4+(4+4+5+4+5+4+5+4+4)+3+3+24
|
||||
.ident (.concat ("op_tick_40_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -803,7 +841,7 @@ tickident page, 8
|
|||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
LDY WDATA ; 4
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
STA zpdummy
|
||||
JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_24"))
|
||||
|
|
@ -812,7 +850,7 @@ tickident page, 8
|
|||
.macro op_tick_42 page ; pattern repeats from op_tick_24
|
||||
;4+(4+4+5+4+5+4+5+4+3+4)+3+24
|
||||
.ident (.concat ("op_tick_42_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -822,7 +860,7 @@ tickident page, 8
|
|||
STA page << 8,Y ; 5
|
||||
LDY WDATA ; 4
|
||||
STA zpdummy ; 3
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_24")) ; 3 + 24
|
||||
.endmacro
|
||||
|
|
@ -830,7 +868,7 @@ tickident page, 8
|
|||
.macro op_tick_44 page ; pattern repeats from op_tick_26
|
||||
; 4 + (4+4+5+4+5+4+5+4+5+4)+3+3+19
|
||||
.ident (.concat ("op_tick_44_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -840,7 +878,7 @@ tickident page, 8
|
|||
STA page << 8,Y ; 5
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
BIT tick; 4
|
||||
BIT TICK; 4
|
||||
|
||||
STA zpdummy ; 3
|
||||
JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_19")) ; 3 + 19
|
||||
|
|
@ -849,7 +887,7 @@ tickident page, 8
|
|||
.macro op_tick_46 page ; pattern repeats from op_tick_28
|
||||
;4+(4+2+4+5+4+5+4+5+4+5+4)+3+20
|
||||
.ident (.concat ("op_tick_46_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -860,7 +898,7 @@ tickident page, 8
|
|||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
NOP ; 2
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_20"))
|
||||
.endmacro
|
||||
|
|
@ -868,7 +906,7 @@ tickident page, 8
|
|||
.macro op_tick_48 page ; pattern repeats from op_tick_30
|
||||
;4+(4+4+5+4+5+4+5+4+5+4+4)+3+3+15
|
||||
.ident (.concat ("op_tick_48_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -880,7 +918,7 @@ tickident page, 8
|
|||
STA page << 8,Y ; 5
|
||||
|
||||
LDA WDATA ; 4
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
STA zpdummy ; 3
|
||||
JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_15")) ; 3 + 15
|
||||
|
|
@ -889,7 +927,7 @@ tickident page, 8
|
|||
.macro op_tick_50 page ; pattern repeats from op_tick_32
|
||||
;4+(4+4+5+4+5+4+5+4+5+4+2+4)+3+16
|
||||
.ident (.concat ("op_tick_50_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -902,7 +940,7 @@ tickident page, 8
|
|||
|
||||
LDA WDATA ; 4
|
||||
NOP ; 2
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_16"))
|
||||
.endmacro
|
||||
|
|
@ -910,7 +948,7 @@ tickident page, 8
|
|||
.macro op_tick_52 page ; pattern repeats from op_tick_34
|
||||
;4+(4+4+5+4+5+4+5+4+5+4+4+4)+2+3+12
|
||||
.ident (.concat ("op_tick_52_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -923,7 +961,7 @@ tickident page, 8
|
|||
|
||||
LDA WDATA ; 4
|
||||
STA .ident (.concat ("_op_tick_6_page_", .string(page), "_jmp"))+2 ; 4
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
NOP ; 2
|
||||
|
||||
JMP .ident(.concat("_op_tick_page_", .string(page), "_tail_12"))
|
||||
|
|
@ -932,7 +970,7 @@ tickident page, 8
|
|||
.macro op_tick_54 page ; pattern repeats from op_tick_36
|
||||
; 4 + (4+4+5+4+5+4+5+3+3+4+5+4+4)+4+4+4+3
|
||||
.ident (.concat ("op_tick_54_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -948,7 +986,7 @@ tickident page, 8
|
|||
STA zpdummy ; 3
|
||||
STA zpdummy ; 3
|
||||
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
; used >3 pad cycles between tick pair; can't branch to tail
|
||||
STA @D+2 ; 4
|
||||
|
|
@ -961,7 +999,7 @@ tickident page, 8
|
|||
.macro op_tick_56 page
|
||||
; 4+(4+4+5+4+5+4+5+4+5+4+4+4+4)+2+4+4+3
|
||||
.ident (.concat ("op_tick_56_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -976,7 +1014,7 @@ tickident page, 8
|
|||
STA @D+2 ; 4
|
||||
|
||||
STA dummy ; 4
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
; used >3 pad cycles between tick pair; can't branch to tail
|
||||
NOP ; 2
|
||||
|
|
@ -990,7 +1028,7 @@ tickident page, 8
|
|||
.macro op_tick_58 page ; pattern repeats from op_tick_40
|
||||
;4+(4+4+5+4+5+4+5+4+5+4+4+3+3+4)+4+4+3
|
||||
.ident (.concat ("op_tick_58_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -1006,7 +1044,7 @@ tickident page, 8
|
|||
|
||||
STA zpdummy ; 3
|
||||
STA zpdummy ; 3
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
; used >3 pad cycles between tick pair; can't branch to tail
|
||||
LDA WDATA ; 4
|
||||
|
|
@ -1018,7 +1056,7 @@ tickident page, 8
|
|||
.macro op_tick_60 page
|
||||
; 4+(4+4+5+4+5+4+5+4+5+4+4+4+4+4)+2+4+3
|
||||
.ident (.concat ("op_tick_60_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -1035,7 +1073,7 @@ tickident page, 8
|
|||
LDA WDATA ; 4
|
||||
|
||||
STA dummy ; 4
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
; used >3 pad cycles between tick pair; can't branch to tail
|
||||
NOP ; 2
|
||||
|
|
@ -1047,7 +1085,7 @@ tickident page, 8
|
|||
.macro op_tick_62 page
|
||||
;4+(4+4+5+4+5+4+5+4+5+4+4+4+3+3+4)+4+3
|
||||
.ident (.concat ("op_tick_62_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -1064,7 +1102,7 @@ tickident page, 8
|
|||
|
||||
STA zpdummy ; 3
|
||||
STA zpdummy ; 3
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
; used >3 pad cycles between tick pair; can't branch to tail
|
||||
STA @D+1 ; 4
|
||||
|
|
@ -1075,7 +1113,7 @@ tickident page, 8
|
|||
.macro op_tick_64 page
|
||||
;4+(4+4+5+4+5+4+5+4+5+4+4+4+4+4+4)+2+3
|
||||
.ident (.concat ("op_tick_64_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -1093,7 +1131,7 @@ tickident page, 8
|
|||
STA @D+1 ; 4
|
||||
STA dummy ; 4
|
||||
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
NOP ; 2
|
||||
|
||||
@D:
|
||||
|
|
@ -1103,7 +1141,7 @@ tickident page, 8
|
|||
.macro op_tick_66 page ; pattern repeats from op_tick_8
|
||||
; 4+(4+4+5+4+5+4+5+4+5+4+4+4+3+4+3+4)+3
|
||||
.ident (.concat ("op_tick_66_page_", .string(page))):
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
LDA WDATA ; 4
|
||||
LDY WDATA ; 4
|
||||
STA page << 8,Y ; 5
|
||||
|
|
@ -1122,7 +1160,7 @@ tickident page, 8
|
|||
|
||||
STA zpdummy ; 3
|
||||
STA zpdummy ; 3
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
@D:
|
||||
JMP op_nop ; 3
|
||||
|
|
@ -1248,7 +1286,7 @@ op_terminate:
|
|||
; the last 4 bytes in a 2K "TCP frame". i.e. we can assume that we need to consume
|
||||
; exactly 2K from the W5100 socket buffer.
|
||||
op_ack:
|
||||
BIT tick ; 4
|
||||
BIT TICK ; 4
|
||||
|
||||
; allow flip-flopping the PAGE1/PAGE2 soft switches to steer writes to MAIN/AUX screens
|
||||
; actually this allows touching any $C0XX soft-switch, in case that is useful somehow
|
||||
|
|
@ -1269,7 +1307,7 @@ op_ack:
|
|||
LDX #<S0RXRD ; 2
|
||||
STX WADRL ; 4
|
||||
|
||||
BIT tick ; 4 (36)
|
||||
BIT TICK ; 4 (36)
|
||||
|
||||
LDA WDATA ; 4 Read high byte
|
||||
; No need to read low byte since it's guaranteed to be 0 since we're at the end of a 2K frame.
|
||||
|
|
@ -1294,7 +1332,21 @@ op_ack:
|
|||
; - used as the low byte for resetting the W5100 address pointer when we're ready to start processing more data
|
||||
LDX #$00 ; 2 restore invariant for dispatch loop
|
||||
|
||||
JMP CHECKRECV ; 3 (37 with following BIT tick)
|
||||
JMP checkrecv ; 3 (37 with following BIT TICK)
|
||||
|
||||
; Quit to ProDOS
|
||||
exit:
|
||||
INC RESET_VECTOR+2 ; Invalidate power-up byte
|
||||
JSR PRODOS ; Call the MLI ($BF00)
|
||||
.BYTE $65 ; CALL TYPE = QUIT
|
||||
.ADDR exit_parmtable ; Pointer to parameter table
|
||||
|
||||
exit_parmtable:
|
||||
.BYTE 4 ; Number of parameters is 4
|
||||
.BYTE 0 ; 0 is the only quit type
|
||||
.WORD 0000 ; Pointer reserved for future use
|
||||
.BYTE 0 ; Byte reserved for future use
|
||||
.WORD 0000 ; Pointer reserved for future use
|
||||
|
||||
; CLOSE TCP CONNECTION
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user