SNES2Atari - Revision history

MSaarna at 19:13, 1 February 2023

2023-02-01T19:13:43Z

2023-02-01T19:12:40Z

2022-11-21T14:08:53Z

2022-11-20T16:55:21Z

2022-11-20T16:27:19Z

2022-11-20T15:27:20Z

2022-11-20T15:26:03Z

2022-11-20T15:25:29Z

2022-11-20T15:24:40Z

2022-11-20T14:53:47Z

@@ Line 124: / Line 124: @@
 ==Test Rom==
-[[Media:Snes2atari_test_rom.zip|Snes2atari_test_rom.zip]] can be used to test your snes2atari adapter, or your emulator snes2atari implementation.
+[[Media:Snes2atari_test_rom.zip|Snes2atari_test_rom.zip]] can be used to test your snes2atari adapter, or your emulated snes2atari implementation.
 ==Authorship==
 The SNES2Atari circuit design and driver was written by AtariAge user Danjovic. All code and circuit design was kindly provided by him under the "no rights reserved" CC0 license.

@@ Line 122: / Line 122: @@
    ;from clock rise to next sample: 3+2+5+5+5+[2]+4+2+2 = 30 -> 25.2us
 ==Authorship==
 The SNES2Atari circuit design and driver was written by AtariAge user Danjovic. All code and circuit design was kindly provided by him under the "no rights reserved" CC0 license.

@@ Line 49: / Line 49: @@
   INITPORT2:
-     lda SWCHB
+     lda SWCHB  ; 7800 specific init...
-     ora #$10
+     ora #$10   ; Skip this block if you're targeting the 2600
      sta SWCHB  ; PB4 High->DISABLE transistor Q5, enabling single button joystick
-     lda #$03         ; 2
+     lda #$03         ; 2 7800/2600 joystick port init...
      sta CTLSWA       ; 5 enable pins UP/DOWN to work as outputs
      sta SWCHA        ; 5 make pins clock (UP) and latch (DOWN) to go high

← Older revision		Revision as of 16:55, 20 November 2022
Line 125:		Line 125:
	==Authorship==		==Authorship==

−	The SNES2Atari circuit design and ~~adapter~~ was written by AtariAge user Danjovic. All code and circuit design was kindly provided by him under the "no rights reserved" CC0 license.	+	The SNES2Atari circuit design and driver was written by AtariAge user Danjovic. All code and circuit design was kindly provided by him under the "no rights reserved" CC0 license.

@@ Line 1: / Line 1: @@
 ==What is it?==
-The SNES2Atari is an adapter that allows you to connect an SNES controller to the Atari 7800, 2600, the Atari 8-bit computer line, and likely many other platforms that have a DB9 joystick port and can use Atari joysticks. Games must be specifically coded to use the SNES controller.
+The SNES2Atari is an adapter that allows you to connect an SNES controller to the Atari 7800 console, Atari 2600 console, the Atari 8-bit computer line, and likely many other platforms that have a DB9 joystick port and can use Atari joysticks. Games must be specifically coded to use the SNES controller.
 The design is quite minimal, and can be implemented with just an SNES extension cable, a 1kΩ resistor, and a serial DB9 breakout connector. Alternatively, a more robust adapter can be implemented with a minimal pcb, a SNES port, a 1kΩ resistor, and a serial DB9 connector.

@@ Line 3: / Line 3: @@
 The SNES2Atari is an adapter that allows you to connect an SNES controller to the Atari 7800, 2600, the Atari 8-bit computer line, and likely many other platforms that have a DB9 joystick port and can use Atari joysticks. Games must be specifically coded to use the SNES controller.
-The design is quite minimal, and can be implemented with just an SNES extension cable, a 1kΩ resistor, and a serial DB9 breakout connector. Alternatively, a more robust adapter can be implemented with a minimal pcb, an SNES port, a 1kΩ resistor, and a serial DB9 connector.
+The design is quite minimal, and can be implemented with just an SNES extension cable, a 1kΩ resistor, and a serial DB9 breakout connector. Alternatively, a more robust adapter can be implemented with a minimal pcb, a SNES port, a 1kΩ resistor, and a serial DB9 connector.
 The SNES2Atari circuit and driver was created AtariAge user Danjovic.

@@ Line 11: / Line 11: @@
 ==SNES2Atari Adapter Wiring==
-Note: when the 7800 console has the controller port in two-button mode, 5 volts is directly connected to pin 6. The 1kΩ resistor in snes2atari serves to protect the snes controller data output line when the console is in this state.
+Note: when the 7800 console has the controller port in two-button mode, 5 volts is directly connected to pin 6. The 1kΩ resistor in snes2atari serves to protect the snes controller data output line when the controller port is in this state.
 [[File:Snes2atari circuit wiring.png|100%|SNES2Atari Adapter Wiring]]

@@ Line 18: / Line 18: @@
 ==SNES2Atari Driver==
    ;    ___ _  _ ___ ___      _     _
    ;   / __| \| | __/ __|  __| |_ _(_)_ _____ _ _
@@ Line 120: / Line 119: @@
+   ;
+   ;
-   ;from Latch down to read first bit: 4+2+2+2+5+5+2 = 22 -> 18.5us
+   ;from Latch down to read first bit:    4+2+2+2+5+5+2 = 22 -> 18.5us
-   ;from clock rise to next sample   3+2+5+5+5+[2]+4+2+2 = 30 -> 25.2us
+   ;from clock rise to next sample: 3+2+5+5+5+[2]+4+2+2 = 30 -> 25.2us