If you want to program 16-bit 27C400 ROMs like #Kickstart ROMs or #vintagemac ROMs, the #TL866-II programmer is out of production and all sellers sell the #XgecuT48 instead. Even if they claim that it's the TL866-II, it isn't and you'll most likely get a black T48 instead.

The T48 is not compatible with the adapters sold for the TL866-II, it's wired differently and the socket is the other way around.

Luckily now there is an adapter for the T48 also:
https://www.gotek-retro.eu/t48-eprom-adapter/

#RetroComputing

New blog post: Adding CTCSS tones with an Arduino

Need to add tones to the AWA RT85

http://www.pa3guo.com/PA3GUO_Arduino_CTCSS_v1.2.pdf use PWM with varying duty cycle into a bandpass to generate the desired tone

Arduino/ATMEGA https://github.com/tczerwonka/arduino-ctcss

No 91.5 in RT85 programming map, map to 0/no-tone?

WIA default standard tones […]

https://blog.narf.ssji.net/2024/02/07/adding-ctcss-toness-arduino/

#Arduino #AWART85 #XgecuT48 #electronics #ham #µblog

New blog post: Adding CTCSS tones with an Arduino

Need to add tones to the AWA RT85

http://www.pa3guo.com/PA3GUO_Arduino_CTCSS_v1.2.pdf use PWM with varying duty cycle into a bandpass to generate the desired tone

Arduino/ATMEGA https://github.com/tczerwonka/arduino-ctcss

No 91.5 in RT85 programming map, map to 0/no-tone?

WIA default standard tones […]

https://blog.narf.ssji.net/2024/02/07/adding-ctcss-toness-arduino/

#Arduino #AWART85 #XgecuT48 #electronics #ham #µblog

New blog post: Updating scan list

I want to close my AWA RT85 with some progress

Haven’t worked out the CTCSS module or frequency encoding yet

I can change the scan list to local repeaters

Got the updated repeater list from the WIA

Played with VLOOKUP in LibreOffice

Also, conditional formatting, but had to file a bug

Also copying the 2m FM call freq to […]

https://blog.narf.ssji.net/2024/01/27/updating-scan-list/

#AWART85 #minipro #XgecuT48 #electronics #ham #µblog

New blog post: Reflashing ATMEGA

Maybe I didn’t fry my ATMEGA328P, but just wiped it?

https://forum.arduino.cc/t/arduino-bootloader-for-atmega-128/131410/2

Bootloaders in ~/.arduino15/packages/arduino/hardware/avr/1.8.6/bootloaders/atmega`

Can’t program the old one

Can program the new one

Still can’t program it in the dev […]

https://blog.narf.ssji.net/2024/01/26/reflashing-atmega/

#Arduino #minipro #XgecuT48 #electronics #hardware #µblog

New blog post: EPROM switcharoo

Working on Updating channel memory on decommissioned AWA RT85 radio

Managed to desolder the original MC27C16 EPROM

The heat gun approach worked a treat, particularly as it had a 50-450°C range, so I could avoid overheating the board with only 150–200°C

Dumped the EPROM data, and re-loaded it on an AT28C16

Put a DIP24 socket in […]

https://blog.narf.ssji.net/2023/12/31/eprom-switcharoo/

#AWART85 #XgecuT48 #electronics #ham #µblog

New blog post: To kill a chip

Received the handy header for the BusPirate

Wired everything, and somehow fried the ATMEGA328

When programming from the Arduino IDE, it now complains as follow

avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00
…
avrdude: stk500_recv(): programmer is not […]

https://blog.narf.ssji.net/2023/12/16/to-kill-a-chip/

#waterTankSensor #XgecuT48 #electronics #hardware #µblog

New blog post: Updating channel memory on decommissioned AWA RT85 radio

I have an AWA RT85 2m radio, programmed for VK2 Ham channels. Now in VK7, I’m working on reprogramming it, by finding how and what to write to its EPROM.

https://blog.narf.ssji.net/2023/11/25/updating-channel-memory-awa-rt85-ham-radio/

#AWART85 #minipro #XgecuT48 #electronics #ham #hardware #µblog