Mastodawn

Interesting problem with #LT6502 main board, I've got the RAM, ROM, CPU and Glue on now.
I've the minimal glue logic in and I can see it starts EhBASIC and I can even run Mandelbrot.However, it only sends data out when data is coming in. I.e. to see the Mandelbrot being generated I have to hold down a key.....
Glue code is the same as my #PC6502, schematic for the FT245 is the same, so I'm very confused.

Paula Maddox Dec 30

Got my first transputer program running from my #PC6502

Very simple code that spits out 0xAA000000 if it’s a 16 bit transputer and 0xAAAA0000 if it’s 32 bit.

Output is -
<< READ =$AA
<< READ =$AA
<< READ =$00
<< READ =$00

Next write something simple to confirm the tool chain I have works.
Then a server program to run on the 6502, so I can then run some Mandelbrot code on the transputer.

Long way to go, but fun

#retrocomputing #transputer #6502

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Paula Maddox Dec 24

Here it is, and oh boy does it get toasty!
Next I best figure out how to get it doing something, like say..... a Mandlebrot!

#Transputer #PC6502

Paula Maddox Dec 24

FINALLY!!!
The #PC6502 is talking to a #transputer !!
I can now write and read to the memory on the TRAM !!!

Colour me very happy!!!

#Retrocomputing

Paula Maddox Dec 10

To nights fun with the #PC6502 tower, a Sierpiński triangle.
Didn’t take me quite as long to get running.
This is sped up video, it takes about 2 minutes to plot 2000 random dots.

Paula Maddox Dec 10

I woke up at silly o’clock, so I did some work on my #PC6502 computer and scaled the mandlebrot up.
This is now 168x240 (screen is 272x480) and is using the screens rectangle function as I still can’t get a single pixel to plot.
When done it draws a white rectangle around the whole image.

#retrocomputing #mandlebrot

Paula Maddox Dec 6

Oddly enough I can’t get a pixel to plot, but I can get a line. So I did the #mandlebrot on my #PC6502 computer.
Had a play with colours and scales until I got a combination I liked.
The image in real life is much more vibrant.
#retrocomputing

Paula Maddox Dec 6

Wohooo!!!
Finallly got the display for my #PC6502 system running!!
Currently text and the wrong orientation but graphics is only a hop and a skip away!
#retrocomputing

Paula Maddox Dec 2

Wooot today’s haul of chips from someone at work having a clear out of his loft.
12 Inmos T414 #transputer chips and 7 TMS32020 DSP chips
I’m looking forward to connecting these to my #PC6502 stack when the PCBs arrive (couple of weeks time)

Paula Maddox Nov 23

Finally after several days, I’ve managed to get the start of display initialisation code in for my #PC6502 stack and I can write and read data to/from the display using SPI (65SPI2).

Console output -

RUN
RA8875 INIT:
CMDWrite>: 0x80 CMD>:0x00
DATAREAD>: 0x40 Data<:0x75

Ready

So the next step is to add in rest of the init code and try to write hellos world on it.