An attempt to standarize HP-41 Bank Switching.

[MeindertKuipers]

Will do, please have a bit of patience since I have many parallel activities at the moment (most non-calculator related)

(09-30-2021 03:32 PM)Sylvain Cote Wrote:  Meindert,
Can you please validate my next update for MLDL2000.
Thank you!
Sylvain

MLDL2000 packaged in a card reader shell:

• Unit specifications:
  • released in June 2005
  • SRAM: 1M x 16 bits (s/n < 2050)
  • SRAM: 512K x 16 bits (s/n >= 2050)
  • Flash: 1M x 16 bits (Flash can contain up to 255 ROM images)
  • firmware < v1.51: support bank switching from page 0x6 to page 0xF
  • firmware >= v1.51: support bank switching from page 0x0 to page 0xF
    
• Bank switching instructions:
  • ENBANKx/ENROMx 1 to 4 are supported (0x100, 0x180, 0x140, 0x1C0)
    
• Bank switching behavior:
  • even/odd port pages are linked (0x8/0x9, 0xA/0xB, 0xC/0xD, 0xE/0xF)
  • even/odd system pages are linked (0x0/0x1, 0x2/0x3, 0x4/0x5, 0x6/0x7)
  • PWO event clears bank switching state