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Welcome to [email protected]

David B.
 

?
Hello,
?
Before two years elapse with this group being very, very quiet.? It's time to wake-up and smell solder and get some retro-bit actively computing.
?
What Z80 machine(s) do you own and do you have some modern Z80-based kit and is it working?
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I have somewhere collecting dusk a Radio Shack model 4 and a model 100.? At least the model 100 has been powered up in the last decade!
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I bought a Z80 kit and most of the parts to build and ordered some boards by built oversea for another.? But this last month I got a p.c. board
that has a PICmicro chip to be a simple 'dumb' terminal.
?
?
regards,
?
David
--
?Chuluota, FL
?
?
?
 

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"Yah but..."? In the interest of one more post, I believe the Radio Shack Model 100 has an 80C85 processor and *not* a Z80...

I got questions:? how much RAM does your Model 100 have??? Do you have any ROM plug-ins that provide extra software???

Oh yeah... you did say the Model 100 was *not* recently powered up...


On 8/27/2020 9:51 AM, David B. wrote:
?
Hello,
?
Before two years elapse with this group being very, very quiet.? It's time to wake-up and smell solder and get some retro-bit actively computing.
?
What Z80 machine(s) do you own and do you have some modern Z80-based kit and is it working?
?
I have somewhere collecting dusk a Radio Shack model 4 and a model 100.? At least the model 100 has been powered up in the last decade!
?
I bought a Z80 kit and most of the parts to build and ordered some boards by built oversea for another.? But this last month I got a p.c. board
that has a PICmicro chip to be a simple 'dumb' terminal.
?
?
regards,
?
David
--
?Chuluota, FL
?
?
?

Virus-free.

 

Hello Charles,

"Sure but ..." This forum is 'big' enough and has room for anyone including a Intel-based 8080 small machine. :-) Even if it has an S-100 bus making a 'large' small machine.

more seriously

My model 100, last powered (about three years back) up had a sticky and non-functional 'p' key. The display did work though. It was a 32k machine when purchased new and is pretty much as purchased with no ROM plug-ins. Used it to learn Basic and at the time I had the Radio Shack mini 4-pen plotter.

David B.
ajparent1/kb1gmx
 

Partial list of what I have in systems..? I left out the
PDP-8/PDP11/MicroVAX section.
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CPM speaking machines:
======================
S100 subgroup
-------------
Altair8800(pre-A) Built jan 1975 SN200!
Altair 8800B-T complete, factory 1978
2 Northstar Horizon, CP/M, NS*dos, hard disk (one I built in '77)
CCS-2200 (z80-full boat) CP/M2.2?
Compupro full boat with 8085/8088 or Z80 card and MPX-1 (CCPM)
Netronics Explorer 8085 ?w/VDM1

SBC/bounded systems:
--------------------
AmproLB+ CMOS modded and running with 45mb 3.5" SCSI
SB180 with SCSI adaptor, adptec scsi bridge and 20mb CPM2.2
3 Visual technolgies 1050, CPM-3 two with outboard 10mb SCSI disk
Kaypro 4/84 w/handyman and Advent turborom+personality card
Kaypro II complete
2 Vt180 complete
2 Vt180 CP/M board built up as standalone one modded for 6mhz
1 Vt185 Thats a Vt125 + Vt180.
Osborne 1
Several Epson PX-8 with 120k ram wedge and 300bd modem wedge
?
Other buses (not s100):
-----------------------
NS* Advantage (hard disk)
2 Hurkon Z80 Multibus system CP/M2.2
?
ajparent1/kb1gmx
 
Edited

FYI:
?
TRS80 M100 slab is 80C85...? LCD display and typical unit
has 8k to 32K of ram. Mine have been upped to 32K.
Those ran on penlite (AA) cells!
?
I tend up lump 8080, 8085, NSC800 and the whole Z80 family
(z8000 series excluded) as upward software compatible
processors.? That is if you write code for 8080 it should
generally run on all of them.
?
Then again Epson PX-8 was a z80 cmos? with? CP/M in rom
and 8 line by 80 character display.? Fully portable with self
contained battery.? Of the three I have all have wedges
on them that extend ram and give it a ram disk(64/128K).
?
There was a great diversity of systems from the late 80s
though the early 90s.
?
ajparent1/kb1gmx
 
Edited

For fun I got a new machine to play with...
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It replaces (I still use it) my YASZBC (Yet Another Z80 Single Board Computer)
with was a Z180 with 256K and 8K of eprom, and 765 FDC.
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The latest is Z180 at 18.4mz with 512K of ram, 512K of EEPROM,
and a uSD for storage.? Its from Small Computer Central
WWW.SCC.ME.UK.? Its the RomWBW CP/M computer.
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The difference is the YASZBEC is the same foot print as a 5.25" floppy
(6x 8.5") plus the two FD55 drives.? The new is small (4.375x3x1.25 inches)
and puts in a pocket... sans terminal (or PC running minicom).
Compared to earlier machines at nearly 10mhz (internal Z80 speed)
its fast and the uSD is more than enough storage with eight? 8mb
CP/M or Zsystem disks plus the romdisk.? There is Basic and others
like Forth.? It features two serial ports.
?
?
?
Allison
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ajparent1/kb1gmx
 

SC131 z180 computer?
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Screen shots for the system booting and menues along the way.
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Z180 cpu at 18.432mhz?
512K EEROM??
512K RAM
2 serial lines to 115Kbaud.
uSD interface and device.? (sliced into eight 8mb CP/M accessible disks)
uses less than 250ma@5V
And very tiny!
?
The images are minicom on my Linux Rpi400 using a FTDI TTL serial cable.

IMG_1004.jpg
IMG_1005.jpg
IMG_1006.jpg

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