HP-41 RAMBox Questions

[Sylvain Cote]

(02-18-2020 12:29 AM)rprosperi Wrote:  The German manuals mentioned above explain the PG<>, PG01 and PG10 commands, but the ROM in my device includes these 11 commands (beyond the same 33 from the RAMBOX I set):

PG<>, PG01, PG10, PG00, PG11, ABSP, ACAXY, ACLX, CLA-, PRAXY and PRL.

Perhaps the prior owner customized this ROM adding these additional utility routines?

I have listed the functions for W&W ROM images related to HP-41CW, RAMBOX, HP-41CY & RAMBOX II in Jürgen "HP-41CY re-initialization ROM" thread.

These functions are related to HP-41CY / RAMBOX II who has 64K of QROM (2 x 32K, named RAMBOX #0 and RAMBOX #1)

Included in the manual

• PG01 map RAMBOX #0 even pages (8, 10, 12, 14) and RAMBOX #1 odd pages (9, 11, 13, 15)
• PG10 map RAMBOX #1 even pages (8, 10, 12, 14) and RAMBOX #0 odd pages (9, 11, 13, 15)
• PG<> switches between PG01 and PG10 settings
  

Missing from the manual (educated guess)

• PG00 map RAMBOX #0 even pages (8, 10, 12, 14) and RAMBOX #0 odd pages (9, 11, 13, 15)
• PG11 map RAMBOX #1 even pages (8, 10, 12, 14) and RAMBOX #1 odd pages (9, 11, 13, 15)
  

These functions are coming from the CCD ROM

• ABSP : alpha backspace (OM P6.29)
• ACAXY : accumulate alpha and X by X (OM P6.17)
• ACLX : accumulate line by X (OM P6.22)
• CLA- : erase alpha from the right (OM P6.30)
• PRAXY print alpha and X by Y (OM P6.20)
• PRL : print line (OM P6.24)