Difference between revisions of "Front Panel For 8 Bit Computers"

Revision as of 00:29, 20 June 2021

It has these features. They may not fit your generic design. Especially since this card has to have an I2C interface.

32 Pushbutton Switches
32 LEDs
I2C interface (Two Wire interface - plus power and ground)
- Jumper selectable base address
- Occupies I2C addresses either 0x20-0x23 or 0x24-0x27
- Jumper Selectable I2C terminators
I2C daisy-chain connector
- Interrupt line
  - Can be configured to interrupt on button presses
  - MCP23017 need to be set to Open-Drain output - card has pull-up to Vcc
4 MCP23017 16-bit I2C Port Expanders
- These are fine pitch surface mount parts
3.3V or 5V operation
Compatible form factor with RETRO-EP4CE15 and other cards
- 95x95mm
- 6-32 mounting holes

And

VHDL code to control Front Panel autonomously - Great for FPGA Retro-computers
- 6800 running MIKBUG using the Front Panel - Run/Halt the CPU, Read SRAM, ROM, etc, Write to SRAM
I2C parts are standard MCP23017 drivers which are supported in Arduino and most microprocessors
PSoC driver GitHub Repo
- FrontPanel.c
- FrontPanel.h

@@ Line 56: / Line 56: @@
 * [https://github.com/douggilliland/MultiComp/tree/master/MultiComp_On_RETRO-EP4CE15/FrontPanel01B VHDL code to control Front Panel autonomously] - Great for FPGA Retro-computers
-** [https://github.com/douggilliland/MultiComp/tree/master/MultiComp_On_RETRO-EP4CE15/M6800_MIKBUG_FrontPanel01 6800 running MIKBUG with Front Panel] - Run/Halt the CPU, Read SRAM, ROM, etc, Write to SRAM
+** [https://github.com/douggilliland/MultiComp/tree/master/MultiComp_On_RETRO-EP4CE15/M6800_MIKBUG_FrontPanel01 6800 running MIKBUG using the Front Panel] - Run/Halt the CPU, Read SRAM, ROM, etc, Write to SRAM
 * I2C parts are standard MCP23017 drivers which are supported in Arduino and most microprocessors
 * [https://github.com/douggilliland/Retro-Computers/tree/master/Z80/PSOC/PSOC_Design_Files/Z80-PSoC-3-Chips_002/Z80_3Chip.cydsn PSoC driver GitHub Repo]
 ** [https://github.com/douggilliland/Retro-Computers/blob/master/Z80/PSOC/PSOC_Design_Files/Z80-PSoC-3-Chips_002/Z80_3Chip.cydsn/FrontPanel.c FrontPanel.c]
 ** [https://github.com/douggilliland/Retro-Computers/blob/master/Z80/PSOC/PSOC_Design_Files/Z80-PSoC-3-Chips_002/Z80_3Chip.cydsn/FrontPanel.h FrontPanel.h]