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Assembly Disc Access Primer Course Files

The three practice disc images, DISKMON as each section leaves it and the finished program, for the course Assembly Disc Access Primer.
Source Code
2026
1.0 (9 November 2026)
131 KB
Cross Platform
Last Updated
November 12, 2026
Assembly Disc Access Primer Course Files

About

The files for the site's course Assembly Disc Access Primer: the three practice disc images the course works on, DISKMON as each section leaves it, and the finished program. All of it was made for the course.

Using Them

Unzip the folder. Put diskmon.com on a disc image with edisc.py and run it under XtalDOS in MAME, as S2 shows. Always work on a copy of a practice disc, never the one from the download: several sections change them. The listings are there to check your own typing against; the course works best if you type DISKMON in yourself.

Files in the Package

FileWhat It Is
README.txtWhat is in the folder, and the free downloads the course also needs
diskmon.asmDISKMON as S28 leaves it
diskmon.comThe same, assembled with z80asm 1.8
discs/PRIMER.DSKS6 onwards: the practice disc, with POEM.TXT and ROOMS.DAT
discs/BROKEN.DSKS12: PRIMER.DSK with one sector missing
discs/SECRET.DSKS24 onwards: PRIMER.DSK with letters for sector IDs on tracks 30 to 33
listings/DISKMON at the end of each section, from s02-diskmon.asm to s28-diskmon.asm (S1, S3 and S23 change no code)

Also Needed

Not included, and free from our Downloads page: the TC01 System Master Disc (XtalDOS), the Einstein System ROM (MOS 1.2 & 1.21), edisc.py from Inside the Einstein: The Disc Course Files, and the Einstein Disc Tools from S10 on. You also need z80asm and MAME, set up as in the Z80 assembly course.

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Publisher

TatungBytes
Read about the publisher ➔
FILE downloads
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ZIP Package

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