Hi all,Before I start disassembling Bomberman, has anyone done any reverse engineering work on the Turbo Express / GT's COM port? I've checked the usual hardware documents and Mednafen's sources and neither has any info.
Talk to OldMan. He was f*cking around with it at one point.
Quote from: Arkhan on February 25, 2014, 07:10:57 AMTalk to OldMan. He was f*cking around with it at one point. I got a message from him right as I saw your post Thanks for the heads up though.
;****************************************************************; Gamestick Joyport *;****************************************************************.define GAMESTICK_JOYPORT $1000; -R/; 7: CD-ROM Unit Attached; 6: Nationality/Type (1 = PC-Engine, 0 = TurboGrafx); 5-4: '1'; 3-0: Joypad Port D3-D0; -/W.define GAMESTICK_CLR %00000010.define GAMESTICK_SEL %00000001; 1: Joypad Port CLR; 0: Joypad Port SEL; The Turbo Express / PC Engine GT also uses this register for; bitbanged data transfers over its COM port. This conveniently; uses a 1/8" stereo cable connected as follows:;; Pin Register (W); ---- ---------; Tip Bit 0 (SEL); Middle Bit 1 (CLR); Inside GND;; Setting CLR high (which also disables the joystick) enables; reading the state of the COM port pins through $1000:;; Pin Register (R); ---- ---------; Tip Bit 1 (CLR); Middle Bit 0 (SEL);; For the most basic transfers, CLR can be a clock and SEL data.
Topic: Turbo Express / GT Com Port (Read 364 times)
