Wiki editing discussion

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By mars2000you

Enlighted (5823)

mars2000you's picture

02-03-2021, 16:26

gdx wrote:

Why did you put the pictures of the cartridge MSX-Write on the wiki page since it is integrated in the Sanyo PHC-77?

MSX-Write is on the printer board.

To make easy the comparison. I've added a note about that and improved the description of the cartridge pictures.

Quote:

I think the slot 2 is extended at least into tow secondary slots for the printer interface and MSX-Write. This is certainly the reason for which MSX-Write is not in the slot 3-2.

Maybe Msxholder can check that...

By sdsnatcher73

Paragon (1662)

sdsnatcher73's picture

02-03-2021, 16:40

gdx wrote:

Why did you put the pictures of the cartridge MSX-Write on the wiki page since it is integrated in the Sanyo PHC-77?
MSX-Write is on the printer board. I think the slot 2 is extended at least into tow secondary slots for the printer interface and MSX-Write. This is certainly the reason for which MSX-Write is not in the slot 3-2.

I dumped the MSX Write ROM in the Sanyo PHC-77 and it was not in an expanded slot (according to SAVEROM.COM) and I dumped it using primary slot 2 (but I don't know if secondary slot 2-0 would actually be read in such case). The printer port is I/O only I think so it does not require it's own subslot (like the Kanji ROM which is also not in a subslot).

By sdsnatcher73

Paragon (1662)

sdsnatcher73's picture

02-03-2021, 18:29

Also what is called the “printer board” in the wiki is more than that. In the photo you can see the two cartridge slots are on that board, connected through from the larger grey connector that connects to the main board. On the right are also the two joystick ports which are on top of eachother.

By mars2000you

Enlighted (5823)

mars2000you's picture

02-03-2021, 19:02

sdsnatcher73 wrote:

Also what is called the “printer board” in the wiki is more than that. In the photo you can see the two cartridge slots are on that board, connected through from the larger grey connector that connects to the main board. On the right are also the two joystick ports which are on top of eachother.

I will add these details, but the main utility of this board is related to the printer (hardware and software), so the name is appropriate.

By msxholder

Champion (375)

msxholder's picture

02-03-2021, 19:49

Slot 2 is expanded slot 20 has write in it. SSR is complete.

By Manuel

Ascended (17692)

Manuel's picture

02-03-2021, 22:20

@sdsnatcher73 perhaps it's a nice test to dump subslot 2-1, 2-2 and 2-3 as well. No matter whether nothing is detected.

By mars2000you

Enlighted (5823)

mars2000you's picture

02-03-2021, 22:52

Manuel wrote:

@sdsnatcher73 perhaps it's a nice test to dump subslot 2-1, 2-2 and 2-3 as well. No matter whether nothing is detected.

Maybe he will find the two specific printer roms: 16kB for the control of the printer and 256kB for printing of Kanji characters.

By sd_snatcher

Prophet (3436)

sd_snatcher's picture

04-03-2021, 02:19

gdx wrote:

The wiki articles are true. These power supply are a little different.

Outputs are written on the cases.
FS-AA51: AC 18V 170mA, DC 9V 1200mA
AC-HB1: AC 16V 160mA, DC 6V, 900mA
AC-HB2: AC 16V 160mA , DC 6V 900mA
AC-HB3: AC 18V 170mA , DC 9V 1200mA

While they're a bit different, the different is not relevant enough to cause incompatibility or cause any damage. All of them fit into the specs of the regulator circuitry inside all those machines.

Only the obvious will happen: when you use a weaker MSX1 power supply on an MSX2, you'll be restricted to connect less extensions on the machine, otherwise the power supply won't be able to couple with it.

It's exactly the same with modern PCs. If your power supply doesn't have enough "watts" for what you're consuming, you'll just have to get a more juicier power supply.

Quote:

About the Mitsubishi ML-TS2, I have not checked if the connector is compatible or not but the voltages are not compatible. Do not connect another MSX to this power supply!

It has exactly the same mini-IEC connector as the other MSX2 models. And this is why this special case is what really needs a warning. Including a warning for the non-relevant case will only distract the reader from this one.

By sdsnatcher73

Paragon (1662)

sdsnatcher73's picture

04-03-2021, 03:28

I agree with sd_snatcher on this one. The MSX1 PSU’s will need modifications before being usable (due to the bigger connector) and even then they won’t harm the MSX2 computers. Using the ML-TS2 PSU would seem tempting and will cause damage. So it should be mentioned and at least before mentioning the orher PSUs.

By gdx

Enlighted (4192)

gdx's picture

04-03-2021, 09:29

HB-10 service manual says it only requires 7W and the power supply can provide up to 17W. Used regulator is the uPC7805. It would be a minimun of 7V at the input to output regulated 5V correctly but the Power supply provides about 6V. So even the original power supply seems too just for the HB-10. I do not recommend using it for the HB-F1 or FS-A1.

By cons I think the AC-HB3 or FS-AA51 can probably be used for the HB-10 and HB-20. These power supplies may even be better suited than the original. You just have to pay attention to the regulators if they do not heat up too much with a cartridge that use the 12V (FM-PAC, MMM, SFG-05, etc) and another who consumes a lot. If this is the case, you have just to put a better heatsink on the regulator.

sdsnatcher73 wrote:

The MSX1 PSU’s will need modifications before being usable (due to the bigger connector) and even then they won’t harm the MSX2 computers.

Nobody says these supplies won’t harm the MSX2 computers. What Wiki saids that the power supplies AC-HB1 and AC-HB2P are a different. This is true. These better not to advise something that might not be suitable. I agree to add details but it must be taken into account that there are currently multi-function cartridges that can consume relatively more than those of the past.

I think the PC example bad because it is one of the major PC problems. People add lots of extensions and then complain that their PC is unstable.

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