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3B2: Multiple bugfixes and improvements

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- Allow 3 MB RAM configuration (previously only 1MB, 2MB, and 4MB
  configurations were allowed)
- Allow SCSI CIO card to be used under 3B2/400 emulation (previously
  it could only be used under 3B2/700 emulation)
- Improved CTC, PORTS, and SCSI diagnostic checks
- Fixed a bug in IDISK device that allowed impossible disk
  configurations

The last update is a breaking change that disables the HD161 disk
type by default, since real 3B2 hardware does not support it. The
disk type will still allowed in backward compatibility mode through
use of the "SET IDISK LARGE" command.
This commit is contained in:
Seth Morabito
2024-10-24 13:36:53 -07:00
committed by Paul Koning
parent 5a184eb71d
commit 3e0214aed0
17 changed files with 479 additions and 352 deletions
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10
3B2/3b2_cpu.c
View File

@@ -355,11 +355,15 @@ static const char *att3b2_clock_precalibrate_commands[] = {
MTAB cpu_mod[] = {
#if defined(REV2)
{ UNIT_MSIZE, (1u << 20), NULL, "1M",
{ UNIT_MSIZE, MSIZ_512K, NULL, "512K",
&cpu_set_size, NULL, NULL, "Set Memory to 512K bytes" },
{ UNIT_MSIZE, MSIZ_1M, NULL, "1M",
&cpu_set_size, NULL, NULL, "Set Memory to 1M bytes" },
{ UNIT_MSIZE, (1u << 21), NULL, "2M",
{ UNIT_MSIZE, MSIZ_2M, NULL, "2M",
&cpu_set_size, NULL, NULL, "Set Memory to 2M bytes" },
{ UNIT_MSIZE, (1u << 22), NULL, "4M",
{ UNIT_MSIZE, MSIZ_3M, NULL, "3M",
&cpu_set_size, NULL, NULL, "Set Memory to 3M bytes" },
{ UNIT_MSIZE, MSIZ_4M, NULL, "4M",
&cpu_set_size, NULL, NULL, "Set Memory to 4M bytes" },
#endif
#if defined(REV3)