From e0038674b551353d2e09276725a0471026cc24da Mon Sep 17 00:00:00 2001 From: Andreas Baumann Date: Fri, 11 Nov 2022 17:23:10 +0100 Subject: updates on the status of the IMC-2001 --- content/hardware/imc-2001.md | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/content/hardware/imc-2001.md b/content/hardware/imc-2001.md index c21225c..1fca25c 100644 --- a/content/hardware/imc-2001.md +++ b/content/hardware/imc-2001.md @@ -17,7 +17,11 @@ Trying to fix several issues: - the paddle/joystick connectors miss some legs for putting them into the sockets on the motherboard - sometimes I get into the monitor, lower-nibble bit 3 of the key - pressed is missing + being pressed is missing, unclear where it is lost, I suspect a + bad register on the motherboard holding the current ASCII value of + the key pressed or something similar. +- ROM 1 with BASIC is broken (and gets really hot). This explains + the booting issues.. (will be tricky to get a replacement) - possibly much more Known things to work @@ -29,6 +33,7 @@ Known things to work ROM, video circuit seems to be just fine). - Monitor is working just fine (which is sort of amazing for such an old CRT monitor). +- I can boot from a Apple \]\[ CP/M 56k floppy and I get a prompt. # Images @@ -36,6 +41,10 @@ From the outside: {{< figure src="/images/hardware/imc-2001/computer_full.jpg" alt="IMC-2001" >}} +Booting into Apple \]\[ CP/M 56k: + +{{< figure src="/images/hardware/imc-2001/cpm_40chars.jpg" alt="IMC-2001" >}} + The motherboard and floppy drives: {{< figure src="/images/hardware/imc-2001/motherboard_internal.jpg" alt="IMC-2001" >}} -- cgit v1.2.3-54-g00ecf