Reply 20 of 52, by matskatsaba
Sorry for the delay, gardening came up 😀
Memory chips on the 4meg module:
First two lines are the same:Panasonic MN414100ASJ-07
Bottom line: 93465B 049 (first three); 93465B 012 (rest six)
It's not a branded board. (or it's brand is TD). Below the sticker [TD(printed in blue, stylish font, rest is normal black font) S/N 357095] is a board print that I guess the board type: TD60K
Native 25Mhz board with a harris25mhz cpu, 50MHz oscillator near the CPU, 32Mhz near the FPU socket (probably for the 32/3 clock for the fpu).
Chipset has a sticker:
The mobo has 4 sockets for simms, and 16 sockets for chip ram (20 pin ones).
The IDE controller is made by Acer, A2 REV-C print on it and its S/N (L9220300).
Using MSDOS 6.22
It's called TestExt
I was thinking about using a 34pin sony with it's own controller, but yet to find it in the bess, same with the SCSI drive. Found a working 16bit controller with option rom so I can boot from it, yet to find my old ultraplex40, but working on it.
The chipset should support it since it does work if I don't load the CDROM driver. Starts windows, plays dune with midi and digitized sound samples, vibra16c is working fine too.
bios does not try to move the 384k theoretically. There is an option for that in bios to relocate the 384k and it is disabled.
Not sure about the rest though, will try to troubleshoot the less painful routes before having to take out the logic analyzer, that is a ROYAL pain 😀
As mentioned in the previous test result post:
2x4 megs in lower address space:
oakcdrom.sys - soft freeze, as always
vide-cdd.sys - hard freeze
gscdrom.sys - hard freeze
2x4 megs in upper address space:
Can you give me some ideas on that?
I've been trying with a Cirrus Logic card. Chip print:
[CL logo]Cirrus Logic
Will have to try the emu386 I guess, time for experimenting!
Thanks all for these smart hints, now I have an idea what to test next. Hopefully not with the logic analyzer (^.^);