TRS-80

My first computer was a TRS-80 model 1.

I had so much fun with it that it gave me the motivation to complete a degree in computer science.

And why not write an emulator of the thing.

Clicking on the picture below – or Here – will bring you to my trs-80 emulator.

Old TRS-80 software here

– Model 1 info:

Address map

0000 0000 0000 0000 – 0x0000 – 00 000 – Start of ROM
0010 1111 1111 1111 – 0x2FFF – 12 287-End of ROM (L2 – 12k)

0011 0000 0000 0000 – 0x3000 – 12 288-Start Reserved

0011 0111 1110 0000 – 0x37E0 – 14 304-FDC Start
0011 0111 1110 1111 – 0x37EF – 14 313-FDC End

0011 0111 1111 1111 – 0x37FF – 14 335-End Reserved

0011 1000 0000 0000 – 0x3800 – 14 336-Start Keyboard
0011 1000 1111 1111 – 0x38FF – 14 591-End Keyboard

0011 1001 0000 0000 – 0x3900 – 14 592-Start Reserved
0011 1011 1111 1111 – 0x3BFF – 15 359-End Reserved

0011 1100 0000 0000 – 0x3C00 – 15 360-Start video memory
0011 1111 1111 1111 – 0x3FFF – 16 383-End video memory (1K)

0100 0000 0000 0000 – 0x4000 – 16 384-Start of Ram
1111 1111 1111 1111 – 0xFFFF – 65 535-End of RAM