A custom mini-system running an input test utility. 3 test screens available:
- Digital - shows joypad buttons for first two input devices
- Analog - shows analog axes for first two input devices
- Advanced - shows all standard HPS sourced inputs (joystick, analog, paddle, spinner) simultaneously as well as a ps2 keyboard console
Mode switching instructions are shown at the bottom of the screen.
Created by JimmyStones (http://github.com/jimmystones), with thanks to:
- alanswx (https://github.com/alanswx) for ideas, cross-platform simulation support, and the tutorial this core was based on
- Jotego (https://github.com/jotego) for his very tidy JTFRAME modules
- Porkchop Express (https://misteraddons.com/) for testing a bunch of devices I couldn't
A simple bespoke (i.e. I made it up with no real plan) 8-bit system with a 40x30 character display, each character can be set to one of 256 colours. No sound capabilities. All relevant MiSTer inputs are mapped into memory regions.
- Z80 CPU (tv80 by Guy Hutchison, based on VHDL T80 core by Daniel Wallner)
- jtframe_vtimer for VGA timing (from JTFRAME (https://github.com/jotego/jtframe) by Jotego)
- jtframe_cen24 for clock enables (from JTFRAME (https://github.com/jotego/jtframe) by Jotego)
- 16Kb program ROM (port 1 cpu, port 2 download)
- 16Kb work RAM (port 1 cpu)
- 2Kb character ROM (port 1 cpu, port 2 download)
- 2Kb character RAM (port 1 cpu, port 2 graphics)
- 2Kb colour RAM (port 1 cpu, port 2 graphics)
- 7 Memory-mapped IO regions (all read-only). Yes I know about MREQ but SFRs turned out to be annoying in sdcc so :)
- Hardware state (H/V Sync, H/V Blank etc) (8 bytes)
- joystick_5->0 from HPS (192 bytes)
- joystick_analog_5->0 from HPS (96 bytes)
- paddle_5->0 from HPS (48 bytes)
- spinner_5->0 from HPS (96 bytes)
- ps2_key from HPS (11 bytes)
- ps2_mouse from HPS (48 bytes, combination of ps2_mouse and ps2_mouseext with some padding to align bytes) - currently unused
| Start | End | Length | Name |
|---|---|---|---|
| 0x0000 | 0x3FFF | 0x4000 | Program ROM |
| 0x4000 | 0x47FF | 0x0800 | Char ROM |
| 0x6000 | 0x6000 | 0x0001 | System inputs (video signals) |
| 0x7000 | 0x70BF | 0x00C0 | Joystick inputs |
| 0x7100 | 0x715F | 0x0060 | Analog inputs |
| 0x7200 | 0x722F | 0x0030 | Paddle inputs |
| 0x7300 | 0x735F | 0x0060 | Spinner inputs |
| 0x7400 | 0x740B | 0x000C | PS2 keyboard input |
| 0x7500 | 0x752F | 0x0030 | PS2 mouse input |
| 0x8000 | 0x87FF | 0x0800 | Char RAM |
| 0x8800 | 0x8FFF | 0x0800 | Colour RAM |
| 0xC000 | 0xFFFF | 0x4000 | Work RAM |
/src contains a C program compiled to Z80 assembly using sdcc.
All required ROMs (compiled program and default MiSTer font) are built into this core.
Selecting Load BIOS in the core allows hot loading of binary OS ROM files for easier development. Selecting Load Font in the core allows hot loading of MiSTer .pf font files (https://github.com/MiSTer-devel/Fonts_MiSTer).
sdccsrecord
- Run
makein/src/Makefileto create binary ROM - Run
od -An -t x1 -v src/os.bin > rtl/rom.hexto create hex version of ROM for Quartus build
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.