VT100.no_header is the VT100 application extracted from HP disks. It was extracted with lifutils, patched version 1.7.11, without LIF headers.
This is Z80 code for HP495x platform.
make vt100disThis will create a file vt100.dasm.
Just execute make with no arguments. This will assemble the application and compare it
against the original binary. It will complain if these are not equal.
make Check file vt100.asm. Details on analysis are in analysis.md
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Z80 Assembler: z80asm from Savannah (https://savannah.nongnu.org/projects/z80asm), on Github its here: https://github.com/AlbertVeli/z80asm/tree/master This Assembler has the required directives. There are other Z80 assemblers, but they may differ in options and directives.
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Z80 Disassembler: https://linux.die.net/man/1/z80dasm
Also helpful:
- Z80 Monitor. Part of another Z80 assembler package, see https://wwwhomes.uni-bielefeld.de/achim/z80-asm.html. The monitor in that package executable is called "z80-mon".
I would not have started my analysis of the code, if these people would not have done their pathbreaking work before:
- Doing big analysis and writing a first library using HP4952: https://github.com/DennisD2/4952oss
- Dumping all ROMs https://github.com/VintageProject/HP4952A
- Z80 Opcode table - https://clrhome.org/table/
- VT100 codes - https://espterm.github.io/docs/VT100%20escape%20codes.html
- ASCII codes - https://lwp.interglacial.com/appf_01.htm
- Programmers Calculator - https://calc.penjee.com/
Special information on used chips:
- Toshiba TMPZ84C00A CPU PDF
- Z80 User Manual PDF and https://www.zilog.com/docs/z80/um0080.pdf
SCC information:
- SCC/ESCC User Manual PDF
- Z80C30/Z85C30 CMOS SCC Serial Communications Controller PDF
- SCC access with C, example https://hackaday.io/project/5233-z80-computer/log/19836-serial-io
- Linux SCC driver source https://github.com/torvalds/linux/blob/master/drivers/tty/serial/ip22zilog.c
Z80 programming:
- Tips & Tricks https://rosettacode.org/wiki/Category:Z80_Assembly