yevrowl wrote on 2022-06-28, 01:26:

Greetings! […]
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Greetings!

For example, Hercules Graphics Card (720 × 348 × 2), is emulated by the resident program msherc.com (qbherc.com), and the CGA modes are emulated in it hgcibm.com or simcga.com, and some ohters ( 320 × 200 × 2 or 620 × 200 × 2). Hercules InColor Card is emulated as well?

Interested in how it is possible to emulate these graphics adapters without real hardware:

PCjr / Tandy Graphics Adapter (320 × 200 × 16) → SCREEN 7 mode in Q(uick)Basic.
Plantronics Colorplus (320 × 200 × 16) → SCREEN 7 mode in Q(uick)Basic.
Orchid Graphics Adapter (720 × 350 × 2) → SCREEN 1 or SCREEN 2 mode in Q(uick)Basic.
Olivetti Graphic Adapter (640 × 200 × 2) → SCREEN 1 or SCREEN 2 mode in Q(uick)Basic.

QBHERC/MSHERC is not an emulator, it is a TSR that allows the use of a Hercules Graphics compatible card by Microsoft QuickC, QuickBASIC, and the C Compiler (Microsoft's)
See https://jeffpar.github.io/kbarchive/kb/044/Q44273/

HGCIBM is an emulator that allows the use of CGA compatible software on a Hercules Graphics compatible card
See https://www.pcorner.com/list/GRAPHUTI/HGCIBM.ZIP/INFO/

SIMCGA is an emulator that allows the use of CGA compatible software on a Hercules Graphics compatible card
See http://ftpmirror.your.org/pub/misc/dos/RbbsIn … ents/SIMCGA.DOC

The above links should give you an idea as to how these programs work .

EDIT : In other words, these programs are essentially useless to someone who does not have a Hercules Graphics (or clone) card . Specifically, this is because lots of earlier (S)VGA graphics cards (mainly ISA and VESA local bus ones) that could be switched into a Hercules Graphics compatible mode also could be switched into a CGA compatible mode which was almost certainly more compatible with CGA software than the above emulators.

EDIT2 :
And to answer this :

Interested in how it is possible to emulate these graphics adapters without real hardware:

DOSBox and/or its forks support at least some of these directly .
Additionally, Tandy 1000 graphics emulation (mostly PCJr compatible) under DOS is possible with ftp://ftp.oldskool.org/pub/tvdog/tandy1000/em … rs/tandm055.zip

That all being said, you posted this in the DOSBox sub-forum, so I am not sure if you are referring to DOSBox (where the above software is mostly not needed) versus actual hardware (where it might be useful for Hercules Graphics (or clone) card owners).

For CGA emulation in Hercules there is HGCIBM.
Is there a solution to emulate EGA in Tandy (PCJr)?
Because the video modes are similar (320 × 200 × 16) — https://groups.google.com/g/comp.sys.tandy/c/qQ7XYKSLItA
And also, perhaps, similar solutions for Olivetti and Plantronics Colorplus?

Trying to find Tandy support in Q(uick)Basic — Q(uick)Basic with Tandy in DOSBox

Thanks a lot!

It turned out to display all graphic modes, some in the CGA form.