The ATF22V10 is a Programmable Logic Device. This means you can program the logic in the chip.
Internally it looks like a big matrix of connections which you can program to connect/disconnect from certain logic.
It has just a bunch of inputs/outputs
So if we want to have a 7 Segment decoder (you can easily buy a BCD decoder .. but these only work for displaying 0-9 and not 0-9A-F for displaying HEX numbers)
7 Segment display
Binary IN
7 Segment decoded
Displays
D C B A
A B C D E F G
0 0 0 0
1 1 1 1 1 1 0
0
0 0 0 1
0 1 1 0 0 0 0
1
0 0 1 0
1 1 0 1 1 0 1
2
0 0 1 1
1 1 1 1 0 0 1
3
0 1 0 0
0 1 1 0 0 1 1
4
0 1 0 1
1 0 1 1 0 1 1
5
0 1 1 0
1 0 1 1 1 1 1
6
0 1 1 1
1 1 1 0 0 0 0
7
1 0 0 0
1 1 1 1 1 1 1
8
1 0 0 1
1 1 1 1 0 1 1
9
1 0 1 0
1 1 1 0 1 1 1
A
1 0 1 1
0 0 1 1 1 1 1
B
1 1 0 0
1 0 0 1 1 1 0
C
1 1 0 1
0 1 1 1 1 0 1
D
1 1 1 0
1 0 0 1 1 1 1
E
1 1 1 1
1 0 0 0 1 1 1
F
Now we see that segment A is 1 in the case of (0,2,3,5,6,7,8,9,A,C,E,F)
When programming the PLD we can write that as: (note / means inverted a plus is OR, and * is AND) So A is 0 in case of input being (1,4,B,D)
I’ve used a lot of programming languages, and besides that a few scripting languages.
Scripting is used to automate stuff, but probably use other tools under the hood. A programming language can probably do this by itself. Most of the time a programming language needs compiling into a executable form. Whereas a script is directly intepreted at runtime.
I’m not good at programming, but i understand the syntax and can read most of it. My programming is mostly by example/copy-paste. Below a list of programming languages and a table below that some scripting languages.
Sooo .. what do i like, still use and why?
Bash is my swiss army knife. Making Web stuff? – PHP Iot – C and Javascript Advanced programming/Longer programs or Machine Learning – Python
And because of recent projects … i have to mention 6502 machinecode!
Programming languages i’ve used
Basic
The first programming language i learned. There are many dialects for many different systems.
Pascal
I learned to program in school. Generic pascal and later Turbo Pascal
PLM/86
This is relatively unknown programming language. Written for intel processors. It used a lot of ms-dos subroutines. Like dsso which stands for dos-standard-string-out. dsso(@(‘Print this text’,eos)); And called a dos routine like below (assembly example) mov dx,(messageaddress) mov ah,09h int 21h
Assembly
Started with 6502 assemby on my little home computer (a vic-20). After that i learned to program 8085 assembly in school. Also learned a little Z80 programming. When i got a amiga i started with 68000 assembly. And getting the hang of it, some friends and me started programming 80×86.
C
For a project I needed C programming to control a parallel port, for example for my controllable webcam. Also recently the microcontrollers like the Arduino’s are programmed in C/C++
Perl
Perl was also a interesting language, i bought myself a book and started with the examples. One of my friends was a Perl wizard, but i could never get the hang of it. Even with his help.
Tcl/TK
TCL stands for Tool Command Language, i used the TK extension. So Tcl/TK i used for creating GUI tools in linux. But like what i later used zenity and yad, i think these are more scripting languages.
PHP
PHP i used extensively, one of my first big projects was a tunesearch engine with a mysql database.
Python
The last years i’ve been using python more and more. Python has become the de facto standard for IT.
Haskell
Well .. it is a programming language but i only use it to configure my Xmonad desktop.
Javascript
I’ve made a lot of webbased nonsence. PHP/CGI scripts/flash but i also used javascript. Now i’m primarily using javascript for NodeRed
Scripting languages i’ve used
bat
Dos batch files is a kind of scripting language
Ksh
Korn Shell, i did a workshop ksh because i was a AIX admin. Didn’t use this much, because you could install the linux toolkit, and could use bash after that.
Bash
I write a lot of things in bash, this is my preferred tool for fast and easy automation. When it’s web based i use PHP
Lua
I had to write some plugins for my Flightsim Setup
What about Sql, Dbase, Sed, Puredata and blocky those are all on the Programming Lanuages page of Wikipedia??? Well those i find more of a application markup language. Then you can say abc-music and bmw (bagpipe music writer) are languages also!??
Some call Ansible a programming language, but this is incorrect. It is driven by python scripts and yaml config files.
Below some code part examples of different CPU assembly code
#6502
PUSH CX
PUSH DI
PUSH SI
MOV AX,cry
MOV BX,(2*40)
MUL BX
MOV DI,AX
ADD DI,(2*31)
MOV SI,adr1
SUB SI,8
MOV CX,8
Z80
LD H,00H
LD B,01H
LD A,(IX+00)
OUT (01H),A
LD A,(IY+00)
OUT (02H),A
DJNZ LUS3
LD B,01H
LD A,(IX+07)
OUT (01H),A
LD A,(IY+07)
OUT (02H),A
#8085
LDA 2050
MOV H, A
LDA 2051
ADD H
MOV L, A
MVI A 00
ADC A
MOV H, A
SHLD 3050
HLT
#68000
bsr send
bsr delay2
move.w #$38,d0
bsr send
bsr delay2
move.w #$38,d0
bsr send
bsr delay2
move.w #$01,d0
bsr send
bsr delay2
move.w #$0c,d0
bsr send
move.w #$06,d0
bsr send
rts
#80x68
mov bx,split
and bx,1111111111b
mov dx,3d4h
mov al,18h
mov ah,bl
out dx,ax
mov bl,bh
xor bh,bh
shl bx,1
mov bx,[bx+offset ormsk]
mov al,9
out dx,al
inc dx
in al,dx
and al,10111111b
For assembly i use or used below: vasm – vasm is a portable and retargetable assembler – which can be used for a lot of different CPUs masm – a assembler for 80×86, i used this for programming on DOS machines. Also for little projects i used the alway available debug executable. seka/masterseka – programming 68000 on my amiga
Above is my Kicad design (reverse engineering print below, which was made for my 6802CPU, which i could use to test the 6822 PIA) The 6822 is simular to 6502 in design. So i’m going to redo this for my 6502. The 7 segment displays are a start of hex-keyboard/display combo i’m going to post more of in the next days.
Below a part of the rom for the LCD dual line display.
Part of the ROM assembly code, top part is text (o.a. japanese)
Started to write routines which i can call to manipulate the display. Setting the pointer to a message, setting the line to use and a subset of controlls like: Center, Right, binary to ascii, scrolling, etcetera
lda #0 ; set line number
sta lineno ; store
jsr gotoline ; goto line in display
lda #<message ; get address from message and store for printline subroutine
sta messagestore
lda #>message
sta messagestore+1
jsr printline ; print
lda #1 ; set line number
sta lineno ; store
jsr gotoline
lda #<message2
sta messagestore
lda #>message2
sta messagestore+1
jsr printline
Above additions: New address decoder Below left the new graphical display, below right a test board which shows address lines and decoded chip-enable lines.
A15 high -> ROM A15 && A14 low -> RAM combination of A15 low and A14 high – A13 and A12 wil select peripherals.
Adress decoding
Start of a wirewrapped version
Above is a start of a wirewrapped version, i also started a PCB design in KIcad that will continuously be changed as i alter designs.
UPDATE SID Working! Using new address decoder.
SID = $7000
makesound:
lda #0
sta SID+$5 ; Channel1 - attack/decay
lda #250
sta SID+$6 ; Channel1 - Sustain/Release
lda #$95
sta SID+$0 ; Channel1 - Frequency low-byte
lda #$44
sta SID+$1 ; Channel1 - Frequency high-byte
lda #%00100001
sta SID+$4 ; SAW + Gate
lda #$0f
sta SID+$18 ; Volume max
Started to write a program to generate a memory map like this
It will be a python script which generates a ascii table.
| a15 | a14 | a13 | a12 | a11 | a10 | a09 | a08 | a07 | a06 | a05 | a04 | a03 | a02 | a01 | a00 |
| 1 | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | ROM
| 0 | 0 | a | a | a | a | a | a | a | a | a | a | a | a | a | a | RAM
| 0 | 1 | 1 | x | x | x | x | x | x | x | x | x | a | a | a | a | VIA
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | a | a | a | a | a | a | a | a | PS
Above example shows:
Rom – $8000 and up
Ram – $0000 till $3FFF
Via chip – $6xxx-$7xxxx 16 addresses repeating in this block. This will be the interesting/hard part
python mch2022-tools/webusb_fat_dir.py /flash/apps/python/easy
for f in easy.mp3 easy.png icon.png __init__.py ; do python mch2022-tools/webusb_fat_push.py $f /flash/apps/python/easy/$f ; done
Micropython code __init__.py
mport display
import mch22
from audio import play
import buttons
from time import sleep
from machine import Pin
from neopixel import NeoPixel
powerPin = Pin(19, Pin.OUT)
dataPin = Pin(5, Pin.OUT)
np = NeoPixel(dataPin, 5)
powerPin.on()
def on_home_btn(pressed):
if pressed:
mch22.exit_python()
display.drawPng(0,0,"/apps/python/easy/easy.png")
display.flush()
# Led setup
# 2 3
# 1
# 0 4
np[0] = (23,5,15)
np[1] = (3,15,22)
np[2] = (25,24,1)
np[3] = (25,24,1)
np[4] = (23,4,15)
np.write()
buttons.attach(buttons.BTN_HOME, on_home_btn)
# playing with volume 0 to wakeup sound device, else it is going to clip
play('/apps/python/easy/easy.mp3', volume=0)
sleep(7)
while True:
play('/apps/python/easy/easy.mp3', volume=100)
sleep(30)
App with iconLed in aloha colors and aloha sound clip every 30s
Flashing ROMs .. (eeproms). It used to be a pain in the *$$. Burning took a looong time. But clearing one with UV took .. 20 minutes or so. Using one of these:
Altered clock module
Changed button press
Dipswitches for more speed control (red .. upper left)
Changed Rom/Ram
Changed addressing
Added RAM
ZIF Socket for ROM
VIC 6522
Fixed clock
Added buttons for interrupt
Display
Display works now
To test: Create Address logic to access display without VIA Can work, but not at high speed clock. Stays behind VIA
To buy: st7920 lcd 128×64
Generic improvements
Rewired most parts, using color codes (Blue data, Yellow Address and so on)
Added leds on data and address bus using ULN2803 darlington arrays
100nF Decoupling capacitors on the power rails
To do’s or ‘have to look into’s’
For sound i planned to use a General Instrument AY-3-8910, it is somewhere in my Lab, i know it is. I saved this chip and a SID for my Amiga addon soundcard. Where are my plans for the simple v1 setup? (FOUND IT)
I have to start writing rom functions for display usage. Like JSR $ff00 – Clear screen subroutine .. etc
I’m scraping information from websites, to get started on my clock controller. ATmega328 with ssd1306 display and rotary encoder/dip switches
Notes about the movie: Left side is Arduino IDE monitor reading Addressbus and Databus. (I’m going to try to rewrite this to realtime disassemble) Resetting system. Stepping CPU with manual clock pulses. Start vector being read at $FFFC/$FFFD. Program being run from $8000. Set clock on automatic ( ~ about 150 Hz ) Last opcodes you see a JMP loop 4C 2F 80, that is JMP $802F Display enlarged on video, was not visible on movie i took on mobile. (Wrong angle?)
Breadboard overview
Clock module
Reset module + Crystal
CPU + nmi/int buttons
RAM and ROM
Address decode + Bus divide
Addres/Data bus leds
6522 VIA + Display
2nd via + Buttons
?
(sound board)
TIL: 6502 can run without ram only rom,expect when using JSR … which uses a program stack in RAM
Cartridge printEeproms 8k and 32k (also for 6502 project)Eeprom programmer
I’ve got the tools and Bigred made me enthusiastic again. My goal is to make a C64 Cartridge from a PRG. And Not any program, it is the 8085 Emulator from Sepp.
Serveral problems i have to ‘fix’
The program is 17K, Cartridges can only be 16K. So i have to use 2x 8K and compress the data. This means it have to be uncompressed at start time. ( I was thinking of using exomiser for this )
Program starts normally at $0820 and probably is not optimised to run anywhere else. So a starting routine has to copy the program from cartridge memory to the correct location
Luckily i have the source! How cool is that
For version 4.73 it states : Starting at $0820 .. but my hexdump is off by one??!?
00000020 00 20 ec starts with 00 at $0020 .. and not 20 ?!?!
Tools used until now:
Vice – C64 Emulator x64 -cartcrt 8085.crt
c1541 – Linux disk tool for C64 images. Used this to extract the 8085emulator PRG
prg2crt.py – a convertor from PRG to a cartrid file which can be used by Vice python2 prg2crt.py 8085.prg 8085.crt
minipro – eeprom programming tool for Linux minipro -p AT28C64 -w /tmp/test.bin
cartconv (tool from vice to convert crt <-> bin) cartconv -t normal -i test.bin -n ‘my cart’ -o test.crt
xa – Cross assembler 65xx/R65C02/65816
ACME – the ACME Crossassembler for Multiple Environments
Memory Map C64 – source c64-wiki.com
Card Low starts at $8000, so that’s the place where those roms are going to be. To place on this address:
Copy routine : from ($8000 + this copy routine) to $0820 When to decompress?? jmp routine to $0820
A cartridge file >16K and with his emulation headers seems to work??!
Also nice: Magic Desk Cartridge Generator V3.0
UPDATE: 20220811
exomizer sfx 0x0820 8085.prg -o data.exo # Compress and start at 0x0820
xa frame.asm -o frame.bin # Add code and write binary
x64 --cart16 frame.bin # Test cartridge with Vice
frame.asm
;----------------------------------------------------------
; example usage
; xa frame.asm -o frame.bin
; cartconv -t normal -i frame.bin -n 'my cart' -o frame.crt
; x64 -cartcrt frame.crt
;----------------------------------------------------------
;no load-adress for bin-file, so no header here
*=$8000
.word launcher ;cold start
.word launcher ;warm start
.byte $c3 ;c
.byte $c2 ;b
.byte $cd ;m
.byte $38 ;8
.byte $30 ;0
launcher
stx $d016
jsr $fda3 ;prepare irq
jsr $fd50 ;init memory
jsr $fd15 ;init i/o
jsr $ff5b ;init video
;make sure this sets up everything you need,
;the calls above are probably sufficient
ldx #$fb
txs
;set up starting code outside of cartridge-area
move_starter
ldx #(starter_end-starter_start)
loop1
lda starter_start,x
sta $100,x
dex
bpl loop1
jmp $100
;---------------------------------
starter_start
ldx #$40 ;64 pages = 256 * 64 = 16384 Bytes
ldy #0
loop
src
lda exomized_data,y
dst
sta $801,y
iny
bne loop
inc src+2-starter_start+$100
inc dst+2-starter_start+$100
dex
bpl loop
;make sure settings for $01 and IRQ etc are correct for your code
;remember THIS table from AAY64:
; Bit+-------------+-----------+------------+
; 210| $8000-$BFFF |$D000-$DFFF|$E000-$FFFF |
; +---+---+-------------+-----------+------------+
; | 7 |111| Cart.+Basic | I/O | Kernal ROM |
; +---+---+-------------+-----------+------------+
; | 6 |110| RAM | I/O | Kernal ROM |
; +---+---+-------------+-----------+------------+
; | 5 |101| RAM | I/O | RAM |
; +---+---+-------------+-----------+------------+
; | 4 |100| RAM | RAM | RAM |
; +---+---+-------------+-----------+------------+
; | 3 |011| Cart.+Basic | Char. ROM | Kernal ROM |
; +---+---+-------------+-----------+------------+
; | 2 |010| RAM | Char. ROM | Kernal ROM |
; +---+---+-------------+-----------+------------+
; | 1 |001| RAM | Char. ROM | RAM |
; +---+---+-------------+-----------+------------+
; | 0 |000| RAM | RAM | RAM |
; +---+---+-------------+-----------+------------+
lda #$35 ;cart is always on instead of BASIC unless it can be switched off via software
sta $01
jmp $80d ;for exomizer, i.e.
starter_end
;----------------------------------
exomized_data
.bin 2,0,"data.exo"
;syntax for exomizer 2.0.1:
;exomizer sfx sys game.prg -o data.exo
main_file_end
;fill up full $4000 bytes for bin file ($c000-$8000=$4000)
.dsb ($c000-main_file_end),0
Exomiser info
Reading "8085.prg", loading from $0801 to $4CE9.
Crunching from $0801 to $4CE9.
Phase 1: Instrumenting file
-----------------------------
Length of indata: 17640 bytes.
[building.directed.acyclic.graph.building.directed.acyclic.graph.]
Instrumenting file, done.
Phase 2: Calculating encoding
-----------------------------
pass 1: optimizing ..
[finding.shortest.path.finding.shortest.path.finding.shortest.pat]
size 80273.0 bits ~10035 bytes
pass 2: optimizing ..
[finding.shortest.path.finding.shortest.path.finding.shortest.pat]
size 80039.0 bits ~10005 bytes
pass 3: optimizing ..
Calculating encoding, done.
Phase 3: Generating output file
------------------------------
Encoding: 1101112133423160,1122,2010223445667788,032144406789BBCD
Length of crunched data: 10034 bytes.
Crunched data reduced 7606 bytes (43.12%)
Target is self-decrunching C64 executable,
jmp address $0820.
Writing "data.exo" as prg, saving from $0801 to $304C.
Memory layout: |Start |End |
Crunched data | $07E7| $2F18|
Decrunched data | $0801| $4CE9|
Decrunch table | $0334| $03D0|
Decruncher | $00FD| $01C0| and $9F,$A7,$AE,$AF
Decrunch effect writes to $DBE7.
Decruncher: |Enter |During|Exit |
RAM config | $37| $37| $37|
IRQ enabled | 1| 1| 1|
UPDATE:20230126
; CODE COPY FROM http://www.lemon64.com/forum/viewtopic.php?t=60786&sid=2559442c8b963d7aac27cb13b493f372
; Thanks for posting: Richard of TND
; this is for a 16KB cart, using ACME!!
!to "mycart.crt",cart16crt
scr = $0400
DecrunchADDR = 2061 ;SYS 2061 (HEX $080D)
*=$8000
!word launcher
!word launcher
!byte $c3,$c2,$cd,$38,$30 ;CBM 80
launcher
sei
stx $d016
jsr $fda3 ;prepare irq
jsr $fd50 ;input memory
jsr $fd15 ;initialise i/o
jsr $ff5b ;initialise video memory
;For a more professional boot up. Make
;the border and screen black. AFTER
;the video memory, etc has finished.
lda #$00
sta $d020
sta $d021
cli
;Switch off the screen.
lda $d011
and #%11101111
sta $d011
;Move transfer code over to the screen
;memory.
ldx #$00
tloop lda transfer,x
sta scr,x
inx
bne tloop
jmp scr
transfer
ldx #$00
tr1 lda linkedgame,x ;Move from linked address
sta $0801,x ;Direct to BASIC start address
inx
bne tr1
inc scr+4
inc scr+7
lda scr+4
bne transfer
jsr $e453 ;load basic vectors
jsr $e3bf ;init basic ram
ldx #$fb
txs
;Execute the game, by jumping to the
;de-cruncher's start address.
;jmp $0820
jmp DecrunchADDR
;Link crunched game as a PRG file to memory after
;the cartridge build code.
linkedgame
!bin "8085sys.prg",,2
FileSize = *
!if FileSize >$c000 {
!error "FILE SIZE IS TOO BIG TO FIT 16KB CARTRIDGE"
} else {
*=$c000
}
Exomizer:
exomizer sfx sys 8085.prg -o 8085sys.prg
Reading "8085.prg", loading from $0801 to $4CE9.
Crunching from $0801 to $4CE9.
Phase 1: Instrumenting file
-----------------------------
Length of indata: 17640 bytes.
[building.directed.acyclic.graph.building.directed.acyclic.graph.]
Instrumenting file, done.
Phase 2: Calculating encoding
-----------------------------
pass 1: optimizing ..
[finding.shortest.path.finding.shortest.path.finding.shortest.pat]
size 80273.0 bits ~10035 bytes
pass 2: optimizing ..
[finding.shortest.path.finding.shortest.path.finding.shortest.pat]
size 80039.0 bits ~10005 bytes
pass 3: optimizing ..
Calculating encoding, done.
Phase 3: Generating output file
------------------------------
Encoding: 1101112133423160,1122,2010223445667788,032144406789BBCD
Length of crunched data: 10034 bytes.
Crunched data reduced 7606 bytes (43.12%)
Target is self-decrunching C64 executable,
jmp address $0820.
Writing "8085sys.prg" as prg, saving from $0801 to $304C.
Memory layout: |Start |End |
Crunched data | $07E7| $2F18|
Decrunched data | $0801| $4CE9|
Decrunch table | $0334| $03D0|
Decruncher | $00FD| $01C0| and $9F,$A7,$AE,$AF
Decrunch effect writes to $DBE7.
Decruncher: |Enter |During|Exit |
RAM config | $37| $37| $37|
IRQ enabled | 1| 1| 1|
exomizer sfx $\0801 8085.prg -o 8085out.prg
Reading "8085.prg", loading from $0801 to $4CE9.
Crunching from $0801 to $4CE9.
Phase 1: Instrumenting file
-----------------------------
Length of indata: 17640 bytes.
[building.directed.acyclic.graph.building.directed.acyclic.graph.]
Instrumenting file, done.
Phase 2: Calculating encoding
-----------------------------
pass 1: optimizing ..
[finding.shortest.path.finding.shortest.path.finding.shortest.pat]
size 80273.0 bits ~10035 bytes
pass 2: optimizing ..
[finding.shortest.path.finding.shortest.path.finding.shortest.pat]
size 80039.0 bits ~10005 bytes
pass 3: optimizing ..
Calculating encoding, done.
Phase 3: Generating output file
------------------------------
Encoding: 1101112133423160,1122,2010223445667788,032144406789BBCD
Length of crunched data: 10034 bytes.
Crunched data reduced 7606 bytes (43.12%)
Target is self-decrunching C64 executable,
jmp address $0801.
Writing "8085out.prg" as prg, saving from $0801 to $304C.
Memory layout: |Start |End |
Crunched data | $07E7| $2F18|
Decrunched data | $0801| $4CE9|
Decrunch table | $0334| $03D0|
Decruncher | $00FD| $01C0| and $9F,$A7,$AE,$AF
Decrunch effect writes to $DBE7.
Decruncher: |Enter |During|Exit |
RAM config | $37| $37| $37|
IRQ enabled | 1| 1| 1|
This looks okay: (monitor in vice)
Attaching crt in vice
Maybe one of these problems:
1) you CAN NOT use BASIC routines when a cart is inserted (without weird tricks, i.e.
storing BASIC routines on cart etc)
2) you need to be careful about $01 as you may map in ROM at $8000 without expecting it.
Please refer to this if in doubt:
http://unusedino.de/ec64/technical/aay/c64/memcfg.html
[3] You should also be careful about the usage of KERNAL routines as some of them
sweep across BASIC-code as well!
Loads of stuff on my main fileserver. (Graph is a great tool called DUC) https://duc.zevv.nl/
Besides a search engine, i have a file finder. Due to the massive amount of data, i like to find things by other means than knowing the directory structure.
I can find files by filename, but also by contents.
I’ll talk about find by contents first.
I’ve got loads of documents in Pdf, HTML, txt, doc, sheets , wordperfect etcetera. Those documents i can find using a tool named Namazu. This is quite a old tool, but i’m using it for a long time and it still works great. I didn’t find a better replacement yet. (But i’ve been looking into : elasticsearch, Solr, Lucene)
http://www.namazu.org/ is easy to install, but if you want the tool to scrape different kinds of documents you have to add some additional software.
My multipurpose printer can scan pages in pdf. Those are only embedded jpg’s in a pdf container. I will talk about how i handle these later.
My current start page : This index contains 267,763 documents and 14,036,762 keywords.
Search example of namazu
Some things to consider when implementing namazu:
tweak the file types to scrape, it makes no sense to scrape binaries
you can set a parameter in the config for search only, this disables downloading the found link in the results!
Before Namazu i used HtDig.
Screenshot htdig
HtDIg also can scrape remote websites, Namazu can’t.
Preparing PDF for indexing:
I’ve written some scripts to make PDFs containing scanned text scrape-able. ( https://gitlab.com/fash/inotify-scanner-parser ) What it does:
My scanner puts a scanned pdf on my fileserver in a certain directory
Inotify detects a written file
it will copy the file, run OCR on it (tesseract) and writes a txt file (scapeable)
After that the text will be embedded (overlay) on the PDF, so now it becomes searchable/scrapeable
When certain keywords are found, it will sort documents in subdirs
Example from a scanned jpg, i can find OCR words! (note .. the overlay is exact on the found words)
Finding files by name:
For finding files a made a little webpage like this:
It is a simple webpage grabbing through a list of files. It takes the first keyword and does a grep, it takes a second keyword to match also. I can select different file databases to search. (This case is private) Between search and private i can give the number of entries to print. So i can do Search “ansible” NOT “tower” 50 entries from the public fileset
The Altair 8800 is a microcomputer designed in 1974 by MITS and based on the Intel 8080CPU. Interest grew quickly after it was featured on the cover of the January 1975 issue of Popular Electronics and was sold by mail order through advertisements there, in Radio-Electronics, and in other hobbyist magazines.
(picture from wikipedia)
UPDATE: 20220804 – Added Octal sheet
I alway loved the simple setup of this computer. There was no screen and no keyboard. Only later additions to the machine provided these.
One explanation of the Altair name, is that the name was inspired by Star Trek episode “Amok Time“, where the Enterprise crew went to Altair (Six).
There are only a few differences between the used 8080 CPU and the 8085 CPU of a machine i learned machinecode on.
See : https://www.henriaanstoot.nl/1989/01/01/8085-machinecode-at-school/
So for a really long time i wanted to have a Altair alike machine. There are do it yourself kits for sale. Which look like perfect relica’s and there are virtual machines and emulators. But i wanted to have the feeling of throwing the switches. You can find a emulator here (https://s2js.com/altair/)
So i bought the components, a poker case which can hold the machine. And started building today.
The backend is a arduino based emulator, but with real leds and switches! (https://create.arduino.cc/projecthub/david-hansel/arduino-altair-8800-simulator-3594a6)
Components and pokercaseDrillingFirst looks
Next to do:
Fix plate into case
Solder a LOT of wires and components!
Shall i get rid off the transitors and use darlington arrays?
Put lettering on the aluminium plate : Functions and Bus information.
Build a power connector in the case
And then … programming 🙂
UPDATE: 20220804 – Added Octal sheet
The Altair is a octal based machine, but i couldn’t find a opcode list in Octal. So i generated one. When entering a MOV D,M instruction for example, you have to enter x 0 1 0 1 0 1 1 0 using the switches Thats 126 in octal but most tables are in hex ( MOV D,M is 56, which is 0101 0110 but not that clear on the switches)
I got a vintage racetrack from a colleage a while back.
In the past i had some ideas controlling train or race tracks. For train tracks i wanted to write intelligent maneuver software. For a racetrack a web controllable race. Maybe with a webcam mounted on the car??
L298N – DC motor controller
So i bought a little DC motor controller (2 channels) and took a esp32.
