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update readme.md - clarity

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@ -15,11 +15,11 @@ who did the most of the hard work of deciphering and publishing the programming
protocol of these chips. Their programs were Windows based and relied on protocol of these chips. Their programs were Windows based and relied on
presence of parallel port (LPT). Afterburner was written for Linux OS presence of parallel port (LPT). Afterburner was written for Linux OS
(also works on Win32/64, Mac OSX64), and requires serial connection to (also works on Win32/64, Mac OSX64), and requires serial connection to
Arduio UNO, which does the programming of the chip. Arduio UNO, which does the programming of the GAL chip.
Supported GAL chips: Supported GAL chips:
* Atmel, ATF16V8B ATF22V10B, ATF22V10CQZ * Atmel ATF16V8B, ATF22V10B, ATF22V10CQZ
* Lattice GAL16V8A, GAL16V8B, GAL16V8D * Lattice GAL16V8A, GAL16V8B, GAL16V8D
* Lattice GAL22V10B * Lattice GAL22V10B
* National GAL16V8 * National GAL16V8
@ -168,9 +168,10 @@ Troubleshooting:
10V, 11V, 12V, 13V, 14V, 15V. Do not go beyond 15V as you may damage the 10V, 11V, 12V, 13V, 14V, 15V. Do not go beyond 15V as you may damage the
GAL chip. GAL chip.
* measure the VPP only when the chip is physically DISCONNECTED. Some brands * measure the VPP only when the GAL chip is physically DISCONNECTED (taken
of the GAL chip (Atmel) - when connected - iternally lower the voltage out of the afterburner socket). Some brands of the GAL chip (Atmel) - when
on the Edit (VPP) pin (voltage divider?) and such voltage reading is misleading. connected - iternally lower the voltage on the Edit (VPP) pin (voltage divider?)
and such voltage reading is misleading.
* use an external power supply for your Arduino UNO, powering * use an external power supply for your Arduino UNO, powering
just via serial USB cable may not be sufficient for driving the GAL chip and the just via serial USB cable may not be sufficient for driving the GAL chip and the
@ -192,6 +193,9 @@ Troubleshooting:
* ensure your user is member of the of the dialup group or alernatively run * ensure your user is member of the of the dialup group or alernatively run
afterburner as superuser (use: sudo ./afterburner ...) afterburner as superuser (use: sudo ./afterburner ...)
* ensure no other programm on your PC uses that serial port. Close putty, minicom or other
terminals you may be running.
- afterburner fails to connect to /dev/ttyUSB0 - afterburner fails to connect to /dev/ttyUSB0
* ensure your PC is actually connected to Arduino UNO, check a serial device * ensure your PC is actually connected to Arduino UNO, check a serial device