- #Minipro eeprom programmer buffer error fix serial
- #Minipro eeprom programmer buffer error fix full
- #Minipro eeprom programmer buffer error fix Pc
- #Minipro eeprom programmer buffer error fix series
The basic program is described on Greg Searle’s Simple Z80 web page. The right one is with all of the address lines set to 0. There are three options available for selection. There is no mention of how the ROM system needs to be configured.
#Minipro eeprom programmer buffer error fix serial
The Serial I/O device was delivered one incorrect IC socket (14 pin instead of 16 pin), so I had to solder one chip directly to the board. The RC2014 device only works when there is a ground provided by another source, such as the Logic Analyser. I don’t know how this can be fixed easily.
This looks like some kind of ground loop problem. Yet, when the logic analyser is removed the serial I/O is no longer working. With both the Logic Analyser and the FTDI interface attached to the RC2014 the comforting welcome from Greg Searle appears on the Terminal, urging us to cold or warm boot.
#Minipro eeprom programmer buffer error fix series
Reducing the in series resistance doesn’t allow either the FTDI or the Prologic interface to work either. They could be 0 Ohm, but it is better to be a bit conservative. Let’s reduce those resistors down to around 100 Ohm. That’s a bit more than I’d expect to see. Note that there are 2.2kOhm resistors in series with the serial module Rx and Tx lines. But we aren’t seeing characters on the FTDI Rx line on the Terminal. The Logic Analyser shows that the 63B50P chip is doing its job and producing characters on the Tx line. Prologic PL2303 Serial Cable, exits inline with backplane connector. As I had a PL2303 based serial cable, I decided to use that, as it is much cleaner than using an FTDI adapter, and it allows the Serial I/O board to be positioned anywhere on the backplane. The Serial I/O card should be connected to the FTDI Basic or other FTDI FT232R equivalent device. This means that the RC2014 is living, but somehow the Serial I/O board is not functioning properly. Note the ASCII text message appearing on the Tx line on the backplane, noting the Geoff Seale copywrite, the invitation to choose cold or warm boot, and the memory size. Reset the system to see what happens immediately after the Reset is released. Also, if the Serial I/O port is attached then the Tx and Rx lines can be monitored on the backplane too. The lower few address lines are interesting, because they show where the CPU is reading instructions as it starts up. With an 8 input logic analyser we can’t look at all of the signals at one time, so let’s choose some relevant ones. If that is the case then it is back to the logic analyser to check what is happening on the system now that the CPU has access to instructions to read. Now we check that there is power and ground at both of the ROM and RAM modules. With this signal in place, we can move on to the ROM and RAM modules. On the Address lines, there should be a signal at 1.232 MHz, representing the cycle of CPU running NOPs. Insert the CPU module and check that it has 5V power, GND, and the Clock and Reset lines are working as expected. And it is available across the backplane to all the slots. So the crystal is oscillating and produces 7.353MHz with a good strong signal. Using an oscilloscope to watch the signal, the performance of the Clock and its crystal can be measured. I didn’t equip the Reset button or resistor on my build, because 2x resistors is not required, and only one switch was included in the materials provided. The CPU requires a Clock, and that is provided by the small PCB containing the crystal and the buffer amplifiers. Let’s test that it is effective in providing 5V pull up normally, and pull down to GND when the reset button is depressed. I have used the new backplane Reset function. The components are attached directly to the ZIF40 socket or through the HE10 connector (ICSP cable provided).7805 Regulator with 1A linear diode in Vin. There is no need for an external power supply.
#Minipro eeprom programmer buffer error fix Pc
Simply connect the MINIPRO-TL866A to a PC via a USB port.
#Minipro eeprom programmer buffer error fix full
A full list of compatible devices can be found on the datasheet.Ī Fast SPI algorithm mode enables the MINIPRO-TL866A to provide fast programming.
The MINIPRO-TL866A from Seeit is a universal programmer designed for use with over 13000 devices including EPROMS, EEPROMs, SPI FLASHs, DataFlash and MCUs.