AltairZ80: Adds SET CPU RESIZEMEMORY and other

[deltecent]

Changing the CPU type or MEMORY size/configuration causes memory resources mapped by other devices to be removed. This is not made clear by HELP CPU and the user has no feedback that this is happening.

This PR does the following:

1. HELP SET CPU now shows that SET CPU MEMORY requires a value.
2. Feedback is now provided if the value is omitted or not properly formatted.
3. Unmapped memory resources caused by a SET CPU command is now displayed on the SIMH console.
4. Adds a SET CPU RESIZEMEMORY command that resizes system memory without unmapping other device memory resources.

[deltecent]

Altair 8800 (Z80) simulator Open SIMH V4.1-0 Current        git commit id: c077c22d+uncommitted-changes
sim> set jadedd ena
sim> set cpu ver
sim> show cpu
CPU     
        64KB, NOITRAP, 8080, AZ80, STOPONHALT
        NONBANKED, ALTAIRROM, VERBOSE,
       0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF [16k]
00000: WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
04000: WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
08000: WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
0C000: WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWMMMMWWWWWWWWWWWWMMMMWWWWWWWWWWWR,
0x[02 03 04 05 08 09 0A 10 11 12 13 14 15 16 17 18 19 28 29 2A 2B 32 33 43 A0 A1 A2 A3 A4 A5 A6 A7 FD FE FF]
        MMU, NOSWITCHER, NOPO
sim> set cpu 24k
Unmapping memory 0x0e000, handler=jademem
Unmapping memory 0x0e100, handler=jademem
Unmapping memory 0x0e200, handler=jademem
Unmapping memory 0x0e300, handler=jademem
Unmapping memory 0x0f000, handler=jadeprom
Unmapping memory 0x0f100, handler=jadeprom
Unmapping memory 0x0f200, handler=jadeprom
Unmapping memory 0x0f300, handler=jadeprom
sim> show cpu
CPU     
        24KB, NOITRAP, 8080, AZ80, STOPONHALT
        NONBANKED, ALTAIRROM, VERBOSE,
       0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF [16k]
00000: WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
04000: WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU
08000: UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU
0C000: UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUR,
0x[02 03 04 05 08 09 0A 10 11 12 13 14 15 16 17 18 19 28 29 2A 2B 32 33 43 A0 A1 A2 A3 A4 A5 A6 A7 FD FE FF]
        MMU, NOSWITCHER, NOPO
sim> reset jadedd
  Mapping memory 0x0f000, handler=jadeprom
  Mapping memory 0x0f100, handler=jadeprom
  Mapping memory 0x0f200, handler=jadeprom
  Mapping memory 0x0f300, handler=jadeprom
  Mapping memory 0x0e000, handler=jademem
  Mapping memory 0x0e100, handler=jademem
  Mapping memory 0x0e200, handler=jademem
  Mapping memory 0x0e300, handler=jademem
  Mapping  IO 0043, handler=jadedev
sim> show cpu
CPU     
        24KB, NOITRAP, 8080, AZ80, STOPONHALT
        NONBANKED, ALTAIRROM, VERBOSE,
       0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF [16k]
00000: WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
04000: WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU
08000: UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU
0C000: UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUMMMMUUUUUUUUUUUUMMMMUUUUUUUUUUUR,
0x[02 03 04 05 08 09 0A 10 11 12 13 14 15 16 17 18 19 28 29 2A 2B 32 33 43 A0 A1 A2 A3 A4 A5 A6 A7 FD FE FF]
        MMU, NOSWITCHER, NOPO
sim> set cpu resize=32k
sim> show cpu
CPU     
        32KB, NOITRAP, 8080, AZ80, STOPONHALT
        NONBANKED, ALTAIRROM, VERBOSE,
       0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF [16k]
00000: WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
04000: WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
08000: UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU
0C000: UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUMMMMUUUUUUUUUUUUMMMMUUUUUUUUUUUR,
0x[02 03 04 05 08 09 0A 10 11 12 13 14 15 16 17 18 19 28 29 2A 2B 32 33 43 A0 A1 A2 A3 A4 A5 A6 A7 FD FE FF]
        MMU, NOSWITCHER, NOPO
sim> 

[hharte]

Hello @deltecent ,

thank you for submitting these useful additions. One minor comment that I’d like to see the mapping/unmapping prints only when VERBOSE is set, ie:

Unmapping memory 0x0f300, handler=jadeprom

Mapping memory 0x0f000, handler=jadeprom

Thanks!

[hharte]

Thanks @deltecent , the change looks ok to me. What do you think, @psco ?

[psco]

Thank you @deltecent , this looks fine and can be merged.