boot 250520.z80

z80 - 84.80 kB - 05/20/2024 at 21:10

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microcode bin 240519C.txt

plain - 896.01 kB - 05/19/2024 at 20:25

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microcode bin 240519B.txt

plain - 896.01 kB - 05/19/2024 at 14:17

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microcode bin 240519A.txt

plain - 896.01 kB - 05/19/2024 at 10:06

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microcode bin 240519.txt

plain - 896.01 kB - 05/19/2024 at 08:17

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video_asm.txt

plain - 2.27 kB - 05/17/2024 at 13:26

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microcode bin 240512.txt

Started VGA screen driver

plain - 896.01 kB - 05/12/2024 at 14:58

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isetta RPi 240511.py3

Raspberry Pi Python3 program, to program the microcode flash chips, and to provide character I/O for Isetta. Also provides file transfer to Isetta.

py3 - 47.81 kB - 05/11/2024 at 19:14

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boot 240511.z80

z80 - 61.16 kB - 05/11/2024 at 19:12

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boot backup 240508

boot backup 240508 - 47.31 kB - 05/09/2024 at 07:01

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Isetta Z80 instruction cycles.pdf

Number of cycles for each instruction, compared to the number of the classic Z80

Adobe Portable Document Format - 114.83 kB - 05/03/2024 at 09:49

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Isetta 6502 instruction cycles.pdf

Number of cycles for each instruction, compared to the number of the classic 6502

Adobe Portable Document Format - 91.32 kB - 05/03/2024 at 09:48

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microcode bin 240429.txt

plain - 896.01 kB - 04/29/2024 at 18:03

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microcode bin 240727B.txt

plain - 896.01 kB - 04/27/2024 at 20:46

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loader.z80

This is included in the microcode. The microcode will copy this to main RAM and start executing. The loader can fetch a file from the Raspberry Pi and start executing it. It has a few more functions. It's not finished yet. Version 240427.

z80 - 9.13 kB - 04/27/2024 at 09:33

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generated microcode 240419.txt

Readable microcode for 6502, Z80, Isetta reset and device drivers.

plain - 347.98 kB - 04/20/2024 at 09:52

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isetta milestone 240419

Raspberry Pi Python3 program, to program the microcode flash chips, and to provide character I/O for Isetta

isetta milestone 240419 - 36.50 kB - 04/19/2024 at 17:30

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microcode bin 240419B.txt

Binary (hex format) version of microcode

plain - 896.01 kB - 04/19/2024 at 15:22

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isetta

Current state of the RPi program 31-3-2024

isetta - 26.81 kB - 03/31/2024 at 08:55

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Isetta 20231204.pdf

Schematic (not fully up-to-date)

Adobe Portable Document Format - 3.16 MB - 12/04/2023 at 19:42

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generated microcode 230725.txt

Current microcode for 6502 and Z80

plain - 256.34 kB - 07/25/2023 at 20:36

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Isetta 20230610.pdf

First version of schematic.

Adobe Portable Document Format - 2.17 MB - 06/11/2023 at 13:31

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microcode 230421_new.txt

First version of 6502 microcode generator.

plain - 39.04 kB - 04/21/2023 at 20:55

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