Finally working machines!
Posted: Tue Feb 19, 2019 3:50 pm
Hi,
Well after 12+ years I finally have not one, but two (!!!) working machines! I recently learned my friend Walter wanted a superboard and I had one but not working. I traded him my superboard for a couple other vintage machines I was looking for. I knew Walter would be able to fix it and he did. So we looked at my C1P and my C4P (well, one of them). Both machines had power supply issues.
We tested my board superboard with Walter's (my old) superboard power supply (now fixed). My board worked but the memory size was low. We replaced one 2114 and now it's got the full 8K ram. My C1P supply needs a new voltage regulator. My friend Josh is going to fix that for me and I'll be good to go.
The C4 had one of it's two supplies giving low voltage (the one supplying the top two slots). The machine powered on but would not reset. Luckily the other supply was ok (it powered the bottom two slots). The CPU board was in the top slot, so after moving it to a bottom slot the machine now boots! The 502 board was configured for floppy drive but I didn't have the card so I decided to re-configure it for cassette. Unfortunately the machine was previously repaired and the monitor rom only contained the floppy code. I burned the standard SYNMON onto a 2716 and now the C4 is booting!!!!
It's like its 1981 again
Well after 12+ years I finally have not one, but two (!!!) working machines! I recently learned my friend Walter wanted a superboard and I had one but not working. I traded him my superboard for a couple other vintage machines I was looking for. I knew Walter would be able to fix it and he did. So we looked at my C1P and my C4P (well, one of them). Both machines had power supply issues.
We tested my board superboard with Walter's (my old) superboard power supply (now fixed). My board worked but the memory size was low. We replaced one 2114 and now it's got the full 8K ram. My C1P supply needs a new voltage regulator. My friend Josh is going to fix that for me and I'll be good to go.
The C4 had one of it's two supplies giving low voltage (the one supplying the top two slots). The machine powered on but would not reset. Luckily the other supply was ok (it powered the bottom two slots). The CPU board was in the top slot, so after moving it to a bottom slot the machine now boots! The 502 board was configured for floppy drive but I didn't have the card so I decided to re-configure it for cassette. Unfortunately the machine was previously repaired and the monitor rom only contained the floppy code. I burned the standard SYNMON onto a 2716 and now the C4 is booting!!!!
It's like its 1981 again