SP180_U17-eqn-edited.txt

Edited but unverified

plain - 1.17 kB - 01/31/2024 at 01:43

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SP180_U2-eqn-edited.txt

Edited but unverified

plain - 1.83 kB - 01/31/2024 at 01:43

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SP180_U17-eqn.txt

disassembled by JED2EQN.EXE

plain - 1.01 kB - 01/30/2024 at 23:46

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SP180_U2-eqn.txt

disassembled by JED2EQN.EXE

plain - 1.08 kB - 01/30/2024 at 23:46

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SP180_U2.jed.txt

Primary GAL, a 22V10, interfaces the STEbus. An STEbus access asserts the CPU !BUSRQ signal, and accesses the CPU memory space when !BUSGT is asserted.

plain - 7.14 kB - 01/28/2024 at 14:50

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SP180_U17.jed.txt

Secondary GAL, a 16V8.

plain - 2.89 kB - 01/28/2024 at 14:50

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SP180_rom.bin

Firmware ROM

octet-stream - 16.00 kB - 01/28/2024 at 14:44

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SP180_rom_blocks.txt

plain - 1.06 kB - 02/01/2024 at 23:24

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SP180_rom_symbols_out.txt

text/plain - 51.87 kB - 01/28/2024 at 14:44

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SP180_rom_dump.txt

Hex dump used for spotting ASCII text

plain - 67.15 kB - 01/28/2024 at 14:44

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SP180_rom_dis.txt

Best guess so far.

text/plain - 119.55 kB - 01/28/2024 at 14:44

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SP180_rom_dis.sh

Script for disassembling the ROM image from Linux command line

application/x-shellscript - 181.00 bytes - 01/28/2024 at 14:44

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SP180_rom_symbols_in.txt

I assume the ROM appears at 0000 and 8000 hex, boots from 0000 then jumps to its alias where it then disables the ROM below 8000 hex.

text/plain - 3.36 kB - 01/28/2024 at 14:44

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