UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Specific Vintage Equipment > Vintage Computers

Notices

Vintage Computers Any vintage computer systems, calculators, video games etc., but with an emphasis on 1980s and earlier equipment.

Closed Thread
 
Thread Tools
Old 1st May 2021, 2:34 pm   #41
audiokit
Triode
 
Join Date: Jan 2021
Location: Hulst, Netherlands.
Posts: 47
Default Re: INS8073 - What I wanted, but never got.

All Components are mounted, the wire wrapping can start. I populated the sockets just to show how it will look and of course I will take the IC's out when wiring the back. This is the schematic that I showed in my first post (Radio Bulletin). Perhaps I don't need the 4Mhz Crystal but in the middle I reserved a socket to push it in, should I need (or want) it.
Attached Thumbnails
Click image for larger version

Name:	WIN_20210501_15_26_51_Pro.jpg
Views:	89
Size:	155.4 KB
ID:	233009   Click image for larger version

Name:	WIN_20210501_15_25_37_Pro.jpg
Views:	89
Size:	141.0 KB
ID:	233010   Click image for larger version

Name:	WIN_20210501_15_27_07_Pro.jpg
Views:	76
Size:	187.0 KB
ID:	233011  

Last edited by audiokit; 1st May 2021 at 2:47 pm.
audiokit is offline  
Old 1st May 2021, 4:07 pm   #42
Timbucus
Octode
 
Join Date: Mar 2019
Location: Barry, Vale of Glamorgan, Wales, UK.
Posts: 1,362
Default Re: INS8073 - What I wanted, but never got.

Wow fast progress - I like the idea of doing it with a wirewrap - I have one 40 pin socket so may explore doing the same.
Timbucus is offline  
Old 1st May 2021, 4:36 pm   #43
ortek_service
Octode
 
ortek_service's Avatar
 
Join Date: May 2018
Location: Northampton, Northamptonshire, UK.
Posts: 1,394
Default Re: INS8073 - What I wanted, but never got.

Yes, Wirewrap was quite common in the days of Eurocard prototyping, these separate square pads boards being designed for it, and I still often used to type with contnous ground plane grid on the top.
Quite reminiscent of the original NS PMOS ISP-8A/500 (SC/MP-I) Introkit Keyboard + Display interface teleprinter-alternative, where this kit came with instructions on how to assemble it with wire-wrapping.

Quite novel to put all the passives on headers, in case they altering.
I've always fitted these with leads adjacent to where they connected, and bent lead onto adjacent pad, but not as neat and makes changing things more difficult.
ortek_service is offline  
Old 2nd May 2021, 5:57 pm   #44
audiokit
Triode
 
Join Date: Jan 2021
Location: Hulst, Netherlands.
Posts: 47
Default Re: INS8073 - What I wanted, but never got.

From this afternoon, the INS8073 is alive!

I will post the final schematic.
I could not get the clock pulsing from the schematic that was drawn in my first post. After modification with the same clock I used for the INS8060, all worked fine. This means I only need one inverter from the 74LS14 (TTY after F1)
Mark you were right about the D1, D2, I had to pull them to ground to get 4800 baud at start up.
Tiny basic is a bit different from NIBBLE so I have to find my way programming it but all seem to work as described in the manual.
I enclose some pictures so you can see the result of my weekend's work.
Attached Thumbnails
Click image for larger version

Name:	IMG_20210502_173931.jpg
Views:	95
Size:	94.3 KB
ID:	233094   Click image for larger version

Name:	IMG_20210502_174024.jpg
Views:	92
Size:	107.4 KB
ID:	233095   Click image for larger version

Name:	IMG_20210502_174056.jpg
Views:	97
Size:	164.2 KB
ID:	233096   Click image for larger version

Name:	IMG_20210502_174136.jpg
Views:	94
Size:	142.9 KB
ID:	233097  

Last edited by audiokit; 2nd May 2021 at 6:06 pm.
audiokit is offline  
Old 2nd May 2021, 7:46 pm   #45
Timbucus
Octode
 
Join Date: Mar 2019
Location: Barry, Vale of Glamorgan, Wales, UK.
Posts: 1,362
Default Re: INS8073 - What I wanted, but never got.

Well done and so neatly constructed it goes well with a device from then. I had not really looked at the BASIC I just assumed it was the same as NIBL!
Timbucus is offline  
Old 2nd May 2021, 8:13 pm   #46
Buzby123
Heptode
 
Buzby123's Avatar
 
Join Date: Oct 2011
Location: Culcheth, Cheshire, UK.
Posts: 637
Default Re: INS8073 - What I wanted, but never got.

Bravo !.
Buzby123 is offline  
Old 3rd May 2021, 9:48 pm   #47
audiokit
Triode
 
Join Date: Jan 2021
Location: Hulst, Netherlands.
Posts: 47
Default Re: INS8073 - What I wanted, but never got.

NIBL and Tiny basic are very similar. One difference i found on start up was that you have to tell Tiny basic where you want to store the program by typing "NEW #1000 " followed by NEW. This way you can store several programs at different memory locations. In NIBL you can run several programs in different pages. If you don't type the NEW command, you get an error after every line you type.
The fluent overflow from basic to machine code is the same. LINK, TOP, STAT the use of @ to choose an 16-bit address are all the same. I miss Karen's "page 2" though, page 2 with it's simple assembler and abbility to show blocks of memory brings you so much closer to machine language without really leaving BASIC.
One other thing that is different: the INS8073 becomes a bit warmer than the INS8060.
audiokit is offline  
Old 3rd May 2021, 11:34 pm   #48
Mark1960
Octode
 
Join Date: Mar 2020
Location: Kitchener, Ontario, Canada
Posts: 1,265
Default Re: INS8073 - What I wanted, but never got.

I didn’t notice my INS8073 running warmer than the INS8060.

Did you leave any inputs floating?

I wonder if yours is an NMOS version of the INS8073, mine has date code 8352, and there is a note in the feb81 data sheet that they are now shipping XMOS.
Mark1960 is online now  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 12:45 am.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.