4 ms·

Where do I report a bug? There's no such thing as a HP48GP. It seems that's a HP48G+ That calculator, even thirty years later is close to my heart. As far as I

by chx 4y ago

Where do I report a bug? There's no such thing as a HP48GP. It seems that's a HP48G+ That calculator, even thirty years later is close to my heart. As far as I can remember, it was my first Internet purchase lightly used -- I was still in Hungary and I bought it from the USA -- and then we stacked four SRAM ICs on top of each other with most legs simple melted together vertically except for the select ones. Hand soldering SMT parts, yay -- a buddy did it, I am not crafty enough for that. In essence it became a much more expensive 48GX without the expansion slot. Dave Arnett himself was participating in these conversations, back then, which blew my mind. https://groups.google.com/g/comp.sys.hp48/c/CS0lTpKkBHw/m/vnJh61RXJpoJ https://groups.google.com/g/comp.sys.hp48/c/CS0lTpKkBHw/m/vn...

db48x 4y ago
I remember thinking about upgrading my HP48G when I was in high school. In the end I saved up and bought the HP48GX plus a calculus expansion card instead. That came in handy for the Calculus and Physics classes I had that year. The funniest thing I ever did back then was to hook up the serial port to a 1200 baud modem with lots of big red blinkenlights. I found a simple terminal emulator program and used it to dial out to the county public library system, which offered free email addresses. Once I got it working, I carefully coiled up my custom serial cable and a phone cord of sufficient length in a plastic bag and took them to school with me. Just before lunch near the end of calculus class I quietly got up and strung the cable across the room to a phone jack. Then I went back to my desk, typed in the AT command to start dialing, and grinned as the screech of the modem brought the lecture to an early conclusion. Of course my teacher was annoyed, but even he had join the laughter when I told him that I was just checking my email. Even funnier if you knew that I spent most of my lunch hours either in my Physics teacher’s classroom playing spades (he taught the Calculus class right after lunch, which was convenient), or in the library where they had some terminals plugged into the card catalog system. You could break out of their telnet session and then telnet to wherever you wanted, so I often spent my lunch hour by checking my email (and then logging into a bulletin board to play the door games), so the modem wasn’t actually necessary. Incidentally, I changed the title on https://archive.org/details/hp48gp-calculator https://archive.org/details/hp48gp-calculator to “HP48G+”, as you suggested. Changing the identifier is a rather more fraught process akin to deleting the item and reuploading it, so I’ll let it be. And I bet the MAME driver is named “hp48gp”, so it’s fine.
- chx 4y ago
  Now that you mention, I made a serial cable out of a CD audio cable, it was using the same connector just needed a DB9 soldered on the cut off end... Thanks for upgrading the title.
  - db48x 4y ago
    You’re welcome. Now that you mention it, I don’t recall where I sourced the connector for the serial port. There was nothing unusual about it the connector, but I no longer remember that detail; oh well.
znpy 4y ago
> here's no such thing as a HP48GP. maybe the P is for "plus"
- czx4f4bd 4y ago
  Indeed, if you search for "HP48GP", you'll find a few sites offering the ROM in a file named hp48gp.zip. I suspect that's the source of the mistake.
zrkrlc 4y ago
Got my HP50g in my last year of uni (physics) and I only wish I'd learned to depend on it sooner. Would have been fun figuring out calculus wizardry with a lisp-like language from the get-go.

by chx 4y ago

db48x 4y ago

I remember thinking about upgrading my HP48G when I was in high school. In the end I saved up and bought the HP48GX plus a calculus expansion card instead. That came in handy for the Calculus and Physics classes I had that year. The funniest thing I ever did back then was to hook up the serial port to a 1200 baud modem with lots of big red blinkenlights. I found a simple terminal emulator program and used it to dial out to the county public library system, which offered free email addresses. Once I got it working, I carefully coiled up my custom serial cable and a phone cord of sufficient length in a plastic bag and took them to school with me. Just before lunch near the end of calculus class I quietly got up and strung the cable across the room to a phone jack. Then I went back to my desk, typed in the AT command to start dialing, and grinned as the screech of the modem brought the lecture to an early conclusion. Of course my teacher was annoyed, but even he had join the laughter when I told him that I was just checking my email. Even funnier if you knew that I spent most of my lunch hours either in my Physics teacher’s classroom playing spades (he taught the Calculus class right after lunch, which was convenient), or in the library where they had some terminals plugged into the card catalog system. You could break out of their telnet session and then telnet to wherever you wanted, so I often spent my lunch hour by checking my email (and then logging into a bulletin board to play the door games), so the modem wasn’t actually necessary. Incidentally, I changed the title on https://archive.org/details/hp48gp-calculator https://archive.org/details/hp48gp-calculator to “HP48G+”, as you suggested. Changing the identifier is a rather more fraught process akin to deleting the item and reuploading it, so I’ll let it be. And I bet the MAME driver is named “hp48gp”, so it’s fine.

chx 4y ago
Now that you mention, I made a serial cable out of a CD audio cable, it was using the same connector just needed a DB9 soldered on the cut off end... Thanks for upgrading the title.
- db48x 4y ago
  You’re welcome. Now that you mention it, I don’t recall where I sourced the connector for the serial port. There was nothing unusual about it the connector, but I no longer remember that detail; oh well.

znpy 4y ago

> here's no such thing as a HP48GP. maybe the P is for "plus"

czx4f4bd 4y ago
Indeed, if you search for "HP48GP", you'll find a few sites offering the ROM in a file named hp48gp.zip. I suspect that's the source of the mistake.

zrkrlc 4y ago

Got my HP50g in my last year of uni (physics) and I only wish I'd learned to depend on it sooner. Would have been fun figuring out calculus wizardry with a lisp-like language from the get-go.