You mean, why is it expanded? You can ask the same of the Philips VG 8020/20. I think it comes with the S3527.
As for the Sanyo PHC-77: there is no indication that slot 2 is expanded at all, so I would say it's not. But perhaps msxholder can explain why he thinks it is.
You mean, why is it expanded? You can ask the same of the Philips VG 8020/20. I think it comes with the S3527.
Ehmmm .... but there are machines with S3527 and without expanded slot: Canon V-8, Pioneer PX-V60, Sony HB-10, HB-20, HB-501, Victor HC-30, Yamaha CX-11, SX-100. Different implementation or some pins not connected???
Ehmmm .... but there are machines with S3527 and without expanded slot: Canon V-8, Pioneer PX-V60, Sony HB-10, HB-20, HB-501, Victor HC-30, Yamaha CX-11, SX-100. Different implementation or some pins not connected???
Yes, none of the slots are expanded unless /RSEL is provided. If the slot 0 is expanded you can see diode installed between /RSTO and /X6. If the diode is missing, it means slot 3 is expanded.
What's the utility in MB-H50 to have slot 3 expanded (as it is in brand new openMSX configuration)?
I wonder if Hitachi intended to include a firmware and later decided not to. On the mainboard you can see an empty spot for a ROM, next to the Basic/BIOS ROM. That ROM may be in one of the other subslots of slot 3.
Underneath that open spot is actually another open spot, marked PAL only! Did they intend a release outside Japan at some point? The T6950A seems to support PAL so it may have been possible with the same mainboard.
What's the utility in MB-H50 to have slot 3 expanded (as it is in brand new openMSX configuration)?
I wonder if Hitachi intended to include a firmware and later decided not to. On the mainboard you can see an empty spot for a ROM, next to the Basic/BIOS ROM. That ROM may be in one of the other subslots of slot 3.
It's actually the same slot map as for the MB-H3, but without the MSX2 Sub-ROM and without firmware ROM.
