Dear All, just wondering why hepax ram only got 1304 from HEPROOM. According to hepax user manual, it should be something around 8000 register. Do I miss anything or misunderstand the user manual ?
Quote from user manual:
"Of the 8192 words in the Standard HEPAX and HEPAX Memory modules, 340 words are used internally by the HP-41 itself and the HEPAX file system –leaving 7852 words available to the User. The Advanced HEPAX and HEPAX Double Memory modules contain twice as much memory."
Regards!
Hepax module memory storage
Re: Hepax module memory storage
HEPROOM is expressed in registers, not words.
From the same manual:
'A data file is a collection of HEPAX data registers. Each register will hold one number or 6 characters of text – just like a main memory data register.
Recall that one register in main memory is seven bytes = 7 x 8 bits = 56 bits. Six HEPAX words is 6 x 10 bits = 60 bits. You see that six HEPAX words is enough to store 7 bytes. To get the most from HEPAX memory, we therefore store data in HEPAX data registers that consist of only six words.'
and 7852 words divided by 6 = 1308 registers. Not sure were the 4 other registers are used (file stub probably, a bit like the .END. in program space).
Cheers, Werner
From the same manual:
'A data file is a collection of HEPAX data registers. Each register will hold one number or 6 characters of text – just like a main memory data register.
Recall that one register in main memory is seven bytes = 7 x 8 bits = 56 bits. Six HEPAX words is 6 x 10 bits = 60 bits. You see that six HEPAX words is enough to store 7 bytes. To get the most from HEPAX memory, we therefore store data in HEPAX data registers that consist of only six words.'
and 7852 words divided by 6 = 1308 registers. Not sure were the 4 other registers are used (file stub probably, a bit like the .END. in program space).
Cheers, Werner
41CV†,42S,48GX,49G,DM42,DM41X,17BII,15CE, DM15L
Re: Hepax module memory storage
Thanks for the explanation !
Cheers !
Cheers !