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Author Topic: MSX slot (Read 1486 times)

Offline Zozosoft

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Re: MSX slot
« Reply #30 on: 2018.April.16. 13:22:19 »
Yes, I know about it, but was it made at the factory or exists only a diagrams ? (someone has a manufactured bus ?)
It is existed at the company, there is some test results:
Enterprise Peripherals Test Report

Offline pear

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Re: MSX slot
« Reply #31 on: 2018.April.16. 13:34:12 »
OK, I will ask differently.
Someone saw it on own eyes ? Or is this like Yeti ? :ds_icon_cheesygrin:

Online gflorez

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Re: MSX slot
« Reply #32 on: 2018.April.24. 10:26:09 »
This is the pin correspondence of the Enterprise expansion connector and the MSX slot.

20742-0

Hans has made some corrections.

For example, the Z80 Clock signal is not connected(SE-ONE doesn't use it) but he has recommended me to put a 3.58MHz oscillator if a cartridge needs the signal.

Another fix is to put all memory related signals to +5v through 10kOhms pullups. They are /MERQ, /RFSH, /STLS, /CS1, /CS2 and /CS12. This will avoid any use of the data bus for memory access, only for I/O.

I have used Zozo's page pin-out, but I have swapped the pins upside down to show the connector from the user point of view. The same with the MSX slot. I have used a drawing from MSX.org but turning down the connector. On my prototype the main face of the MSX cartridge is looking towards the Enterprise.

Edit: I have not specified it here, but +5v, +12v and - 12v must be created from the +9v line.

MSX slot power specifications:

-Power source +5V must be 300mA max per slot.
-Power source -/+12V must be 50mA max for all slots.
« Last Edit: 2018.April.24. 11:00:28 by gflorez »