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The classic CP/M approach was two serial port CON: and AUX:. They were typically the same type of devices I used 8251As. THe bis had both and also supported IObyte which was the IO vector map. To a

A cpm based BBS was basically the CCP with undesired commands removed as a base structure as it was single user.? IT was also possible to time slice who was active.? A timer interrupt make the

Paul Bigwood wrote: I've never used Lynx. I'll look into it. Thanks for the tip! However, I have my doubts. Modern web pages insist on using javascript, CSS, images of text instead of text itself,

Good point. I think I have a 512K one because that’s what I had handy – they’re used in many of the Retrobrew ECB and John Monahan’s S100 various boards. I don’t think I have any 62256 chips

What a cute modem! Rich,? If you switch to using a 32K RAM on your SIO, you won't need to cut and patch any RTS/CTS traces.? Firmware is not making any use of RAM Banks. To have the system boot up

Lee, There is Lynx of course. This is a linux text based browser that renders webpages into text like your vcfmw.org page. Maybe something like that could be ported to z80 code, if there arent

Oops - Sorry, that was supposed to be a private message.? My apologies for the bandwidth hogging. ~~ Mark Moulding

Hi, Bill, Perhaps your “pocket-sized Z180 computer” has arrived by now. If so, you may be looking for something to run on it. So here’s a quick “something to send your way”: This is a

While on the topic of modems... https://www.ebay.com/itm/184205143838 They are used in credit card terminals. 2400 baud. Only thing they need besides the normal stuff is a reset signal.

Yeah, not sure how useful this is but it was fun getting it together. The only thing I forgot to mention is the use of a one-piece TTL-to-RS232 level shifter. It has a DE9 on it and fits inside a

Richard Cini wrote: What a cool idea! I still have my Hayes Smartmodem, and fondly remember using it to log onto various BBS's on my CP/M computer back in the 80's. If anyone figures it out, I can

All – Just a fun thing to do with the Z80MC and SIO card. With some great detective work from Josh and a little bit of tinkering, I was able to get the SIO connected to a

I got my TI-86 in 1998 or maybe 1999. So I don't think it would be considered "later" but can't swear to it. It did use a different processor from most of the other graphing calculators they sold. I'm

Many of the later TI 8x were not true Z80 but the sorta compatible Rabbit. and I think later eZ80. A good example of bus width is the DEC T-11, its PDP11 a 16 bit architecture but the T-11 had a

TI-86 is a Z80 with 128mb of memory, so likely one of the processors you guys are talking about, too. Display on them is essentially the same as the TRS-80 computers, except maybe for graphics. There

ajparent1/kb1gmx wrote: Yes. Besides the P112, there have in fact been many follow-in enhancements to the Z80 family. The current TI-84 calculators still use them today. Sort of... 8- vs. 16-bit is a

There was the P112 and its follow on.? IT was popular but the date was 1980 and 8088 was showing its face finally (it had ben around for a while but no takers). . FYI 64180 and Z180 are to most still

64180 was availabe in that large pin dense dense dip or flatpack [J lead TQFP] as is the Z180 and they are both about the same.? I have both and save for clock speed same thing.? ITs biggest

I'm hoping there will be a way to put video on it, one of these days. I'm pretty much starting from scratch, as far as legacy computers go. May have to rob the chips from this one to go on a different

Bill in OKC too via groups.io wrote: This is a pretty interesting little micro. I'm interested to hear how it turns out! But it's off-topic for this thread, as it doesn't have video at all. You may