Ricardo Fernandes Lopes
y interest to computers started back in 1980 when I've just started my
Electronic's engineering degree in Brazil. In 1981 I attended an 'extra' training course on the 8085 microprocessor. So
assembler was the first "computer language" which I liked from the start.
The next year I was gifted with a TK-82C. In fact, it was a ZX-80 clone with a
ZX-81 ROM, so no SLOW mode! After a few months I found a NMI generator schematic
so I build one for my TK-82C to get the SLOW mode functioning ( Grant Searle's Version of SLOW mode
is linked here as a reference) . I also built
an external keyboard for it then later I added a 16k RAM expansion to it. The TK-82C allowed me to learn BASIC and it gave me some help with the BASIC
language classes at school were we used a TRS-80.
About a year later I bought a COMMODORE VIC-20 (still have this one!). Also about
that time, I found the COMPUTE! magazine a great information source to play
with. I reworked a tape recorder and build 3k RAM expansion for the VIC-20.
In 1984 I bought my Apple-II+ adding a double floppy unit which gave me two drives, also a monitor, a CPM
card, a 128k RAM expansion and a dot matrix printer (Epson MX-80) along the
years. I've played a bit with 6502 assembler but the main use of my Apple-II was
playing games! And the Nibble magazine turned to be my preferred magazine.
The first time I saw Forth was GraForth on the Apple-II but did not pay much
attention to it.
Along the years while getting my Electronic Eng. degree and working in the
area of test & measurement I learned some other computer languages like
Pascal, C, C++, 8086, 8051, Tcl/Tk, etc.. by pure curiosity or eventually to
accomplish some tasks at work.
More recently, while surfing the Internet, I had a nostalgic glimpse founding
the 'How to Build your own ZX80
' page by Grant Searle. This page leads me to
'The Jupiter Ace Hardware
' and to the ACE32 MS-DOS emulator
from Paul Robson.
I was caught by the curiosity so, I started reading about Forth and playing
with ACE32. Soon I discovered how smart Forth is and I seek to learn more. I've played with
gForth, bigForth, etc. and today I'm trying to tame the Windows GUI with
I've built in my own Jupiter Ace in "wire-up" adapted to 60Hz TV system. But
rarely play with it because of it's instability. One of my future projects is to
design a PCB to re-build it.
- Tetris Ave version of the classic game - June 2009
- FontED - Font designer Feb 2007
- Sudoku - Sudoku Puzzle Game 2007
- 3D Maze - A great 3D Maze! May 2007
- DIVN - Division a/b with n decimal places using integer arithmetic
- Calendar - I nice neat routine to display the dates, days of a particular month.
- WRD - A code to print any word structure as stored in the Ace dictionary.
Where is he now?
Nowadays I lead a team of technicians in a vibro-acoustic facility of an
automotive company. Developing AceForth programs became one of my hobbies of
today. I usually code with pencil & paper in the bus way to work and using the
amazing EightOne emulator on weekends at home to test them.