A couple of days ago a fellow collector gave me two bags full of various parts he did not need anymore after clearing his vintage inventory. Among them, the following two cards:
https://sites.google.com/site/iulianvshw/other/fs559.jpg
https://sites.google.com/site/iulianvshw/other/fs580b.jpg
At first I was going to toss them (since I thought there was no chance I could test this "unusual PC XT clone"), but I was curious to know what system they came from, so I did a bit of searching and now I find myself wanting to know more... so here goes :
- do the cards come from a Sanyo MBC-550/555 computer?
- is there any way to easily modify a "modern" AT or XT switching PSU to get the required voltages to power up the boards?
- I do have an AMD P8088 CPU but it seems that the ROM chip is missing from the mainboard (the central socket labeled 2764); will it display anything without that?
- I see some sockets for 41256 RAM chips on the CGA card; do they have to be populated in order for the card to work?
- connector CN4 on the CGA card has 4 pins on the other side - what are those for? connector CN3 has no pins - was it originally meant for anything?
- there is an empty DIP-28 socket on the CGA card - what is it for?
More questions may follow, depending on the answers I get for these ones ... many thanks in advance.
https://sites.google.com/site/iulianvshw/other/fs559.jpg
https://sites.google.com/site/iulianvshw/other/fs580b.jpg
At first I was going to toss them (since I thought there was no chance I could test this "unusual PC XT clone"), but I was curious to know what system they came from, so I did a bit of searching and now I find myself wanting to know more... so here goes :
- do the cards come from a Sanyo MBC-550/555 computer?
- is there any way to easily modify a "modern" AT or XT switching PSU to get the required voltages to power up the boards?
- I do have an AMD P8088 CPU but it seems that the ROM chip is missing from the mainboard (the central socket labeled 2764); will it display anything without that?
- I see some sockets for 41256 RAM chips on the CGA card; do they have to be populated in order for the card to work?
- connector CN4 on the CGA card has 4 pins on the other side - what are those for? connector CN3 has no pins - was it originally meant for anything?
- there is an empty DIP-28 socket on the CGA card - what is it for?
More questions may follow, depending on the answers I get for these ones ... many thanks in advance.