>ISA was not an option for VIDEO card at early 90s.
Not sure what you mean when >99% of all Video cards shipped in 1990 were ISA. Alternative were just released EISA and failed MCA. Do you mean not viable performance wise? I dont see how ISA capable of ~5MB/s write speed is a bottleneck when updating 320x200@60 takes less than 4MB/s.
Even ignoring fancy ISA 2D video accelerators like 8514 or TIGA, here is this https://github.com/mills32/Little-Game-Engine-for-VGA-EGA running on 8MHz 8088 XT equipped with ordinary ISA VGA https://www.youtube.com/watch?v=t98OKbYonQI&t=273 @11:10 shows Turbo off 4.7MHz.
>VESA (VLB) was not an option, because it was LOCAL bus, closely tied to CPU architecture, so 486 VLB was not compatible with machines with ANY other CPUs
This theory said, to have sustained performance of Y you must have capacity at least 4*Y (and in cases of small systems could be not 4 but 10 or even more).
If you don't have free capacity, you will periodically suffer bottlenecks.
When Amiga appear, it does not have bottlenecks, it was perfect balanced machine for that time. When appear 386 and even 486, and corresponding 68k CPUs, the more and more architecture become bottleneck, but it was not very obvious. But after started shipping of Pentium machines and drop prices on RAM, so 2M or more become affordable, and people seen 700p screen resolution, it was just too late.
I dont see Zorro in the supported Bus type. VL-Bus is not some special custom Intel 486 CPU bus, its a name for an industry standardized way of attaching memory mapped peripherals. There are even 386SX motherboards with _16bit_ VL-Bus slot https://theretroweb.com/motherboards/s/alaris-leopard-486slc...
Well, I seen many times, when one people lie to other people. You are very special case, you lie to yourself. Sure, in democracy you have right to do so, as you wish.
I dont know what your deal is. You state things that are undeniably not true (ISA not an option), then call me a liar when faced with evidence to the opposite.
> In democracy you sure have rights for such comparing
the what now? This isnt going anywhere productive :)
>ISA was not an option for VIDEO card at early 90s.
Not sure what you mean when >99% of all Video cards shipped in 1990 were ISA. Alternative were just released EISA and failed MCA. Do you mean not viable performance wise? I dont see how ISA capable of ~5MB/s write speed is a bottleneck when updating 320x200@60 takes less than 4MB/s. Even ignoring fancy ISA 2D video accelerators like 8514 or TIGA, here is this https://github.com/mills32/Little-Game-Engine-for-VGA-EGA running on 8MHz 8088 XT equipped with ordinary ISA VGA https://www.youtube.com/watch?v=t98OKbYonQI&t=273 @11:10 shows Turbo off 4.7MHz.
>VESA (VLB) was not an option, because it was LOCAL bus, closely tied to CPU architecture, so 486 VLB was not compatible with machines with ANY other CPUs
https://amiga.resource.cx/exp/egs28 https://amiga.resource.cx/exp/piccolo https://amiga.resource.cx/exp/piccolosd64