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| author | Andreas Baumann <mail@andreasbaumann.cc> | 2023-05-19 08:12:45 +0200 |
|---|---|---|
| committer | Andreas Baumann <mail@andreasbaumann.cc> | 2023-05-19 08:12:45 +0200 |
| commit | 2493f55996a17640f81dfacb9fa9f55a63d3e016 (patch) | |
| tree | 9afc307645cb78c0820ed13ae4272b124a252ce4 /content | |
| parent | 3bc2cb07dadfddc56cb3dcea6962776f8a3a902d (diff) | |
| download | www-andreasbaumann-cc-2493f55996a17640f81dfacb9fa9f55a63d3e016.tar.gz www-andreasbaumann-cc-2493f55996a17640f81dfacb9fa9f55a63d3e016.tar.bz2 | |
updated IMC-2001 status
Diffstat (limited to 'content')
| -rw-r--r-- | content/hardware/imc-2001.md | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/content/hardware/imc-2001.md b/content/hardware/imc-2001.md index 1ea1ec5..0f98ef2 100644 --- a/content/hardware/imc-2001.md +++ b/content/hardware/imc-2001.md @@ -10,6 +10,12 @@ This is an old Taiwanese Apple \]\[ / CP/M clone. Trying to fix several issues: +- strange issues with imaged floppied not working in LinApple or also + not on the real computer, always bailing out in the monitor in strange + locations. Used Fluxengine and ADTPro to get images, they are identical. + Checked the RAM of the machine, no errors. +- HGR shows a line on row 0 only partially. This could be an adjustment issue + of the CRT image or also bad RAM. - the CRT shows some flickering and diagonal effects. Testing on an old TV shows the same issue (so I suspect it's some grounding/shielding issue with the new PSU). @@ -18,8 +24,6 @@ Trying to fix several issues: and produces a flickering image - the CRT is producing some flickering when turning the brightness nob, this should be fixable with some deoxit. -- there could be grounding/signal issues causing the flickering of the CRT - (stemming from the replacement PSU). - keyboard cable is broken, at least the data line - the paddle and the joystick connectors miss some legs for putting them into the sockets on the motherboard @@ -57,8 +61,10 @@ Fixed issues: starting from 0x6000 with #E000-$EFFF and from $7000 with $D000-$DFFF. If this ROM is ok we will see. - Reseated and deoxied all ICs, some of them were quite corroded, at - least 3 more turned out to be bad. Sadly it didn't have an effect on - ROM 1 not getting hot (must be something else). + least 3 more turned out to be bad. ~~Sadly it didn't have an effect on + ROM 1 not getting hot (must be something else).~~ The new replacement + ROM works fine and doesn't get hot. So I actually blame it on the ROM + itself causing the other ICs to fry and not vice-versa. - ~~power switch made some hissing noises, it was not the switch, now the original power is dead (and some transformers are humming). Ordered a Apple 2 replacement PSU, waiting for it..~~ |