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J031-U5.eqn.txt
STEbus interface.
Analysed but not verified.
plain -
2.14 kB -
11/05/2022 at 01:55
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J031-U5.EQN
Disassembled JEDEC file.
eqn -
1.26 kB -
11/05/2022 at 01:55
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J031-U7.eqn.txt
Decodes the MPU memory map.
Analysed but not verified.
plain -
1.71 kB -
11/05/2022 at 01:55
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J031-U7.EQN
Disassembled JEDEC file.
eqn -
859.00 bytes -
11/05/2022 at 01:55
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J031-U32.eqn.txt
Video timing generator.
Analysed but not verified.
plain -
1.51 kB -
11/05/2022 at 01:55
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J031-U32.EQN
Disassembled JEDEC file.
eqn -
853.00 bytes -
11/05/2022 at 01:55
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J031_SGT1V1I2_manual.pdf
SGT1 version 1 issue 2 hardware manual.
Thanks to Steve!
Adobe Portable Document Format -
5.55 MB -
10/23/2022 at 11:24
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Preview
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W031_SGT1V1I2_manual.pdf
SGT1 version 1 issue 2 software manual.
Thanks to Steve!
Adobe Portable Document Format -
4.85 MB -
10/23/2022 at 11:22
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Preview
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W031_ver_1_iss_3_.txt
Source code recreated from the partial listing of the firmware in the software manual. It shows the structure of the jump tables and the names of the routines. Full disassembly variable names, generates the original binary.
plain -
101.96 kB -
10/30/2022 at 17:11
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W031_ver_1_iss_3_.lst.txt
Latest listing.
plain -
509.06 kB -
10/30/2022 at 17:11
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J031-U27-analyser.c
J031-U27 contents as human-readable C array.
Plus a small program to create the timing waveforms.
x-csrc -
2.37 kB -
11/02/2022 at 20:04
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J031_SGT1V1I3_hex_bytes.a68.txt
This file produces the firmware hex file from the byte values.
The hex file serves as a reference to check the reverse-engineered source file produces the same hex file.
text/plain -
44.04 kB -
11/06/2021 at 00:09
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J031-U27.bin
Binary file for U27, the 32-byte PROM for the state machine.
octet-stream -
32.00 bytes -
10/31/2022 at 01:11
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J031-U7.jed
JEDEC file for U7
jed -
2.76 kB -
10/31/2022 at 01:11
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Download
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J031-U5.jed
JEDEC file for U5
jed -
2.76 kB -
10/31/2022 at 01:11
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Download
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J031-U32.jed
JEDEC file for U32
jed -
2.76 kB -
10/31/2022 at 01:11
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Download
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MC6801-6803 INSTRUCTION SET SUMMARY.pdf
Basically the 6800 with a few extra instructions
Adobe Portable Document Format -
138.11 kB -
02/10/2021 at 00:59
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Preview
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6803_datasheet.pdf
6803 datasheet
Adobe Portable Document Format -
1.31 MB -
04/10/2023 at 11:34
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Preview
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Elektor Junior VDU card.zip
Example 6845 board, 2K RAM and monochrome text-only.
The SGT1 had 64K DRAM and colour pixel graphics, more akin to the BBC Micro graphic modes.
Zip Archive -
1.19 MB -
02/10/2021 at 01:55
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AN-834.txt
68000 source code for Motorola Application note 834.
Assembles, but not tested.
plain -
12.65 kB -
04/10/2023 at 13:46
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Download
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Keith