47

The manual says that the smallest resolution it can handle is 800x600. That is almost certainly the key. Original VGA supported 640x480 16-colors and 720x400 (essentially a small step up from the 720x350 monochrome (MDA) text, but with color). While VGA has come to mean "any video card and monitor that uses a blue 15-pin connector" that's not what ...


23

Per the developers of PSIO, the answer is no: Exactly why is [the internal modification] required? There are two signals that PSIO needs in order to function that are not present on the expansion port. These are the CS (Chip Select) and INT (Interrupt) lines from the CD controller. The job of the Switch Board is to basically forward them as well as connect ...


22

DOS is almost surely not outputting 800x600 or up, and is probably in the ballpark of 720x350 or thereabouts. Further, it's likely 70Hz, which this adapter may not like. I'd recommend you get a display that can use the signal from card natively -- any old multiscan CRT and lots of early LCDs can do this -- but if you're determined to use this adapter, you ...


11

I posted a comment on the reverse-engineering Q&A you linked before I realized it'd do better as an answer here. The answerer there found that googling Accom and Axial from your photo turns up a series of video editing controllers, and documentation for a DE-9 connector. If it's an editing controller running RS-422 over DE-9, it's almost certainly Sony 9-...


7

The standard text mode for VGA DOS was 80 by 25 characters, which translated to a resolution of 720 by 400 (characters of 9 by 16 pixels) per the table on VGA text mode page in Wikipedia. One option would be to change the mode and see if you can get the resolution high enough for your converter, but that would depend on the capabilities of the graphics ...


6

Options: (1) Googling "Accom axial" finds various people who bought it, made Youtube reviews etc. If these are not you, contact them and see if they have details. (2) As has been mentioned in the comments, you need a RS422 (not RS232) adapter, e.g. to USB. The cheapest I found after a quick search is 20 EUR. (3) You can often find the serial ...


4

TL;DR The Amiga AGA Alice chip can only support 2MiB of CHIP RAM because it has 20 address lines, and thus allows 2^20 (1M) by 16-bit memory access. The first Agnus chip found in the A1000 only supported 512KiB of CHIP RAM. But this was soon replaced by "Fat Agnus" in the A2000 that supported 512K x 16 (or 1MiB) of CHIP RAM using 19 address lines. ...


3

RGBI to RGB only needs a couple of diodes and resistors, see e.g. here, and that will work with VGA-RGB. I am not aware off-the-shelf ones for that are available, OTOH they are not exactly difficult to make yourself. I have no idea what @mnem means by "RGBA", usually this is an abbreviation for red-green-blue-alpha, and refers to how image data is ...


2

You could maybe solve the 2-step conversion in 2 separate steps: Belkin used to offer a Sun keyboard/mouse to PS/2 adapter as part of their KVM product line (these adapters seem to be available fairly cheaply from eBay ). Once you have a standard PS/2 connectpr, converting that to USB should be possible with standard adapters for PCs.


1

Sort of - there is the tonyhax tool that allows you to softmod an unmodified PS1. There is a nice table on that page that shows which versions of the console it will work with. Specifically, FreePSXBoot is probably what you are looking for - it lets you use a special memorycard with tonyhax on it to softmod the console. Here is a video by Modern Vintage ...


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