IJK interface diagrams.
Re: IJK interface diagrams.
This kind of reminds me of the Atari ST dedicated joystick interface for Gauntlet to allow for four players are the same time: Two on the original ports of the machine, and two on the parallel port interface
Re: IJK interface diagrams.
I'll try to use the same system with more transistors to use the unused mapping combinations of the joysticks, in the end, 4 Atari-type joystick could be connected, or two "combo" joystick type. (8 directions, 6 buttons, and START-SELECT each)
Re: IJK interface diagrams.
The standard PASE interface already had two joysticks portsjbperin wrote: ↑Tue Nov 16, 2021 11:12 pm This really makes think of a Battle Zone For Oric because the arcade version had two joysticks !!
The only software I know that took advantage of it were:
- the demo program going with the interface (TRON-like game), allowing 2 players on joystick
- Harrier Attack using "Joystick adapter" program, using the 2nd joystick button to fire one of the two weapons
- "joystick adapter 2" also mentions Light Cycle, but I never tested it (2 players are possible I guess)
From what I read on the forum, the standard IJK interface also allowed 2 joystiks (but I'll let experts confirm this)
Re: IJK interface diagrams.
The IJK interface use the same way to work, bit7 bit6 to select jost1 or jost2, except these:
-If STROBE is ON, the interface is not readable on the printer port.
-If STROBE is OFF, we can read the state of one of the joystick for a SHORT time, the code must read the values just after setting STROBE off, otherwise, the values disappear, I did'nt verified if the emulator consider this, it could be problematic when the programmed game is tried on a real machine...
-If STROBE is ON, the interface is not readable on the printer port.
-If STROBE is OFF, we can read the state of one of the joystick for a SHORT time, the code must read the values just after setting STROBE off, otherwise, the values disappear, I did'nt verified if the emulator consider this, it could be problematic when the programmed game is tried on a real machine...
Re: IJK interface diagrams.
Looks amazing
- HigashiJun
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Re: IJK interface diagrams.
Kenneth, the sorcerer or the new Oric extensions hardware !