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Replacement PCB Replicates Early 80s Modem
- mytailorisrich 3y agoNice Z8 with accompanying EPROM (2764 so 8KiB) on the original modem's PCB. Edit: There's also an S35212, which Google tells me is an "active filter for telecommuniations".
- itissid 3y agoAn 8bit microcontroller https://www.cpu-world.com/CPUs/Z8/Zilog-Z8681PS.html https://www.cpu-world.com/CPUs/Z8/Zilog-Z8681PS.html The rom is from AMD https://www.ebay.com/itm/303174798174 https://www.ebay.com/itm/303174798174 I can spot a DAC unit from Motorola too
- TedDoesntTalk 3y agoI have the Hayes 1200 external mint in box, if anyone wants to buy it, please email ne.
- reaperducer 3y agoI have the Hayes 1200 external mint in box, if anyone wants to buy it, please email ne. Too late. Just last month we had to get one off of eBay in order to replace a dead one attached to a computer that, for legal reasons, cannot be upgraded.† † Not being upgradable is one of the reasons it's isolated behind a dialup modem and not connected to the company's network. Some day I'll have to write a blog post about how a group of local politicians can write a law that ends up having that effect.
- prmoustache 3y agoI would say that is a good reason to buy a second one as a backup.
- kstrauser 3y agoI need to hear this story.
- IE6 3y ago> Some day I'll have to write a blog post about how a group of local politicians can write a law that ends up having that effect. I would love to read about this :)
- Teever 3y agoFor a while now I've been thinking that war-dialing is probably still a fruitful exercise. It would be fascinating to see what kind of machines are still out there lonely and waiting for someone to give them a call.
- dayofthedaleks 3y agoTake it to your next local HAMfest!
- deleted 3y ago[deleted]
- jeff_vader 3y agoRelated - there's also ESP8266 based TheOldNet wifi modem[1] in case you want TCP/IP over wifi networking in your MS-DOS machine (or possibly others which have support for SLIP - Serial Line Internet Protocol). [1]: https://github.com/TheOldNet/theoldnet-wifi-firmware-binaries https://github.com/TheOldNet/theoldnet-wifi-firmware-binarie...
- myth_drannon 3y agoYou can buy it for 35$ on https://www.tindie.com/products/theoldnet/rs232-serial-wifi-modem-for-vintage-computers-v4/ https://www.tindie.com/products/theoldnet/rs232-serial-wifi-...
- msla 3y agoIs it feasible to build a modem out of a Raspberry Pi Zero or an Arduino? You'd need to hook the phone line to the GPIO pins, do the ADC and DAC stuff in software, implement the V.22 protocol in software, and also implement the Hayes Smartmodem stuff in software, meaning this is one of the few times a Hacker News reader would have occasion to implement the Hayes Code. Is there any show-stopping problem I'm not seeing? Massive electrical incompatibility?
- foldr 3y agoPhone lines operate at way above 5V, so you'd need some level shifting at least.
- mtve 3y ago9V battery was enough for two modems to communicate back-to-back, without dial tone or ringing signals, just "ATD" command on one and "ATA" on another.
- missjellyfish 3y agoTelephone Line Voltage is anywhere between 48 to 90V DC, depending on where in the world you are and which standards apply.
- BizarroLand 3y agoI've experienced the joy of having live telephone wire in my mouth and receiving a phone call. That was an electrifying experience. I was living in a ramshackle house and I wanted dial up internet so I went to the phone company, paid the deposit, and activated my home phone. Got back home, set up my computer, started looking for the phone line. No phone line. Went to the store, bought the phone jack and some cable, hooked it up to the box outside, fished it through the wall. No wire stripper. Not going to go to the store for a cheap wire stripper when I have teeth. Bit into the wire, stripped the first one. Bit into the wire. Stripped the second one. Third one. Bit into the fourth one and got my world rocked. Duh. Stupid. Phone is live. Hooked everything up, plugged in a phone and it immediately rang. I answered, "Hello?" Some woman: "I've been calling you for hours now! Where is Jake?!" "I don't know a Jake" "Stop lying! I know you know Jake!" "Ma'am, I just turned this phone line on a few hours ago. I don't know Jake. You've got the wrong number" "Oh, well, if you see Jake tell him I'm looking for him." "Will do..." This woman was calling my new number and fried the stupid out of my mouth looking for some guy. Strange coincidences abound.
- deleted 3y ago[deleted]
- nickt 3y agoThere’s also some upgrades available for the Hayes Stack Chronograph. https://biosrhythm.com/?p=1546 https://biosrhythm.com/?p=1546
- nsxwolf 3y agoCan I take a moment to express my appreciation for products encased in aluminum extrusions? Why aren't more products like that today?
- bongodongobob 3y agoIt requires custom machining rather than injecting plastic into whatever kind of molds you have.
- nsxwolf 3y agoBut it seems simpler in some ways than injection molding. You make a single die that's a 2D cross section, extrude as much aluminum as you want, cut it into pieces.
- 0_____0 3y agoI think it's just the reverse of this. It's easier than ever to get custom injection molding done, even at relatively low scales. Yes, the setup cost for machining holes in extrusion is very low, but if you're going to make even 1,000 of something you might consider getting a low volume tool made.
- formerly_proven 3y agoExtruded aluminium cases are fairly popular for smaller production runs because they're generally off-the-shelf with only the faceplates being custom (usually laser cut and engraved). So the fixed costs are basically zero but the unit costs are somewhat high (aluminium is expensive). Lots of stuff is just made in large enough runs that molded parts become cheaper overall (very nonzero fixed costs but very low unit costs).
- bluGill 3y agoIf you only need one than the cheapest is find a local machinest and say "make a case to fit" It will be all manual and designed on the mill/lathe except where experience says "better draw this part up first" (one in a while they will scrap a part because it doesn't fit, but overall still cheap). If you need 5-100 then draw it up in CAD and have a machinist (need not be local) throw it on their CNC machines. If you need 1000 or more then design an injection process. Where I put exact numbers that is because the overhead vs efficiency of the process makes this best, where I didn't put anything it is a judgement call, it isn't clear when exactly ones process should be abandoned for the next. (even then sometimes I'm wrong, but for discussion I'm close enough - if you are doing real world work consult a real manufacturing engineer) Injection molding is great for making a lot of parts, but the cost of designing a working mold means the upfront costs are a lot higher and if you cannot reuse that mold enough to spread that cost across many parts it isn't worth doing.
- Freedomboy 3y ago[dead]
- jdyyc 3y agoOooo... The functionality isn't unique but the implementation is awesome. I love the big red leds and hardware power switch etc... Very clean. Now I want one that fits in a USR Courier case.
- bfrog 3y agoAh yes, built to last 40+ years in a metal enclosure. Love it.
- mrlonglong 3y agoNow I want one for my obsolete USR Robotics V92 modem (upgraded from 33.6k)
- jamesfmilne 3y agoIt’s featured in an episode of Adrian’s Digital Basement if you want to see someone build one and try it out. https://youtu.be/De5ufcDueRU?si=cY7kKrlY8slFIM3G https://youtu.be/De5ufcDueRU?si=cY7kKrlY8slFIM3G I did something similar with a Raspberry Pi inside as US Robotics Sportster 14400 Modem, running pppd over serial to give an old Mac internet access. I also rigged it to play the modem handshake when starting the PPP session.
- gwbas1c 3y agoWhat do you use this for? This should be front and center on a page like this. I suspect the wifi modem telnets. Does it ssh? I suspect the target use case is connecting to a telnet BBS from vintage hardware.
- Suppafly 3y agoIf you're upgrading it to support wifi, why not some faster speeds too?