This is a fork of https://github.com/dhansel/pigfx (which is a fork of https://github.com/fbergama/pigfx) with some changes to work better as a terminal for my RunCPM based ZCPR3.3/ZSDOS system and in general. The changes are:
- completely separate carriage return (\r, 0x0d) and line feed (\n, 0x0a) handling on input and output
- improved ANSI escape sequence support (insert lines, delete lines, proper erase to end/beginning of screen, underlining, scrolling margins, private escape sequences for default colour choices and to print any byte value)
- GSX graphics support (a vintage CP/M portable graphics standard, possibly of interest to no one else on the planet!)
- moved to most recent USPi library for keyboard LED support
- properly support keyboard repeat function
- fixed 2 key rollover
- an option of true RTS/CTS handshaking (with STANDALONE_TERMINAL defined) or a quasi RTS output to tell the sending computer to hold up (toggled off when the input buffer is 3/4s full and back on when the buffer is down to 1/4 full)
- with STANDALONE_TERMINAL defined, a console bell using (don't laugh) SPI and DMA to put out an 800Hz tone for 200ms on the SPI0_MOSI pin (GPIO10). Yes, it's massive overkill; but the SPI perhipheral wasn't doing anything and I had all these DMA channels sitting idle...
I have tested this both on a 512MB Raspberry Pi B and a Pi Zero (the non wireless version). It was built on a Raspberry Pi 3 B and the makefiles have been slightly tweaked to account for that.
To install, simply copy the content of the "bin" directory into the root directory of an empty, FAT32 formatted SD card and plug the card into the Raspberry Pi.
The serial port is on the following pins:
- TX (out) : GPIO14 (pin 8 of the 2-row GPIO connector)
- RX (in) : GPIO15 (pin 10 of the 2-row GPIO connector)
With STANDALONE_TERMINAL defined:
Pi 1:
- CTS (in) : GPIO30 (pin 5 of the P5 header)
- RTS (out) : GPIO31 (pin 6 of the P5 header)
Pi 0 (not W):
- CTS (in) : GPIO16 (pin 36 of the 2-row GPIO connector)
- RTS (out) : GPIO17 (pin 11 of the 2-row GPIO connector)
Without STANDALONE_TERMINAL defined:
- "RTS" (out) : GPIO18 (pin12 of of the 2-row GPIO connector)
Note that Raspberry Pi pins are 3.3V (not 5V tolerant).
For more instructions refer to the original projects: https://github.com/dhansel/pigfx https://github.com/fbergama/pigfx
GSX-80 Graphics Extension Programmer's Guide
The Graphics System eXtension
Graphics with CP/M
The MIT License (MIT)
Copyright (c) 2016 Filippo Bergamasco.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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