{"id":609,"date":"2022-12-27T14:27:30","date_gmt":"2022-12-27T13:27:30","guid":{"rendered":"https:\/\/www.heinpragt.nl\/?p=609"},"modified":"2023-11-21T15:25:50","modified_gmt":"2023-11-21T14:25:50","slug":"intel-8052-basic-computer","status":"publish","type":"post","link":"https:\/\/www.heinpragt.nl\/?p=609","title":{"rendered":"DIY Intel 8052 Basic computer"},"content":{"rendered":"\n

A while ago I bought an old box with integrated circuits that had been stored for many years and contained a lot of tubes with very old IS\u2019s. As I like to build old processor boards and try to repair old computers and boards, these chips were very welcome. In one tube there were two original P8052-Basic chips and that brought back good memories of the time mid 80ties of last century when I was working as head R&D embedded programmer and hardware designer for a small company and was using the 8031 processor a lot. I even extended a tiny Basic version at that time, but the real P8031-Basic was incredible and complete, but expensive and hard to get at that time. I put these chips in my computer chips and cpu collection and one I kept aside to make a board to get it working again.<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

I had a latch and a memory chip in my workshop, a PCB was also there, I only needed to order a few 11.0592 crystals as these are not so common anymore. After two evenings of wiring it was finally ready and at my first attempt to run it I got a line number error all the time. I seemed that the external sram was not working and it was a small wiring error. <\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

After I had fixed that it worked like a charm, I connected it to my VT100 terminal with the TTL serial input and after pressing the spacebar I got the prompt and I could write a small Basic program. On this page I will show you the schematic I made, some build instructions and some documentation and (source)code.<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

https:\/\/www.heinpragt-software.com\/software_development\/8052_processor_ide.html<\/a><\/p>\n\n\n\n

AT89C52 – Basic<\/h2>\n\n\n\n

The INTEL 8052AH-BASIC is not available anymore and very rare, I have tried to put the code into a AT89C52 processor and after a few tries this worked fine. You can order a AT89C52 with the service that I will pre program the chip. https:\/\/www.heinpragt.nl\/?product=at89c52-basic<\/a><\/p>\n\n\n\n

Links and downloads<\/h2>\n\n\n\n