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I recently purchased a HP 48GX, and its portable IR printer buddy (printing out pixelated graphs onto a paper roll is oddly satisfying), because I always wanted

I recently purchased a HP 48GX, and its portable IR printer buddy (printing out pixelated graphs onto a paper roll is oddly satisfying), because I always wanted one when I was a kid. I had an HP 48G that I cracked open and soldered extra memory into some 25 years ago, but I was always jealous of the 48GX. So, when it became clear the COVID-19 pandemic wasn't going to be even remotely short-lived I decided to finally splurge on a 48GX to satiate my childhood dreams (aim high kids!) and to see if I could get it to act as a probe endpoint for my company's Modality analysis software. I absolutely love the 48GX, and playing around with it has been fun as I'd hoped (including the esoteric land surveying software expansion card), but if SwissMicros made its own version I'd buy it in a heartbeat. A 40 Mhz Cortex-M4F under the hood of a homage to the 48GX would be awesome!

mmastrac 6y ago
I loved my HP48GX back in the day. I wrote a bunch of tools for it (25 years ago!), including an emulator for that printer: https://grack.com/code/legacy/hp48/hpir/ https://grack.com/code/legacy/hp48/hpir/ The HP48 font is there in the zip package as well if anyone wants to use it for any reason.
- im_down_w_otp 6y ago
  Ha! That's awesome, love it.
agumonkey 6y ago
attempt were made https://old.reddit.com/r/eigenCalc/ https://old.reddit.com/r/eigenCalc/
FPGAhacker 6y ago
That brings back memories. I cracked mine open and soldered the extra memory as well. I nicked a couple board traces drilling out the plastic rivets, but I found a couple vias I could solder at to patch it. I still use that calculator today at work. It has nice base conversion with arbitrary bit depth.
BooneJS 6y ago
My 48GX broke at the bottom of my bag in college, so I replaced it with a 48G. The G is still going strong, and I continue to keep it at my desk today.
fuster 6y ago
Still using my 48G today. I used to have a 48GX as well but some (not old!) batteries leaked and ruined it. In high school I wrote some RPL for it that would use a small 9V-powered 2400bps modem to dial into a local BBS and download my mail.

mmastrac 6y ago

I loved my HP48GX back in the day. I wrote a bunch of tools for it (25 years ago!), including an emulator for that printer: https://grack.com/code/legacy/hp48/hpir/ https://grack.com/code/legacy/hp48/hpir/ The HP48 font is there in the zip package as well if anyone wants to use it for any reason.

im_down_w_otp 6y ago
Ha! That's awesome, love it.

agumonkey 6y ago

attempt were made https://old.reddit.com/r/eigenCalc/ https://old.reddit.com/r/eigenCalc/

FPGAhacker 6y ago

That brings back memories. I cracked mine open and soldered the extra memory as well. I nicked a couple board traces drilling out the plastic rivets, but I found a couple vias I could solder at to patch it. I still use that calculator today at work. It has nice base conversion with arbitrary bit depth.

BooneJS 6y ago

My 48GX broke at the bottom of my bag in college, so I replaced it with a 48G. The G is still going strong, and I continue to keep it at my desk today.

fuster 6y ago

Still using my 48G today. I used to have a 48GX as well but some (not old!) batteries leaked and ruined it. In high school I wrote some RPL for it that would use a small 9V-powered 2400bps modem to dial into a local BBS and download my mail.