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Max 71B Memory Using FRAM71
08-21-2015, 05:36 AM
Post: #1
Max 71B Memory Using FRAM71
Maximum 71B Soft-Configured RAM Using FRAM71

Referring to the S/W IDS, Ch. 2 and 3
1. The memory available for soft-configured devices is the address range 30000-FFC00.
2. If a hard-coded module is installed, E0000-FFC00 will not be available for soft-configured devices.

1. Max RAM
The address range above provides 425472 bytes of RAM. Using 32 and 8K devices, 408K can be configured using the string "939495969798999A9B9C9D9EBF000000".

Code:
Port Dev Size Addr  Type    
0     0    4  F4000  0    
0     1    4  F6000  0    
0     2    4  F8000  0    
0     3    4  FA000  0    
5     0    32 30000  0    
5     1    32 40000  0    
5     2    32 50000  0    
5     3    32 60000  0    
5     4    32 70000  0    
5     5    32 80000  0    
5     6    32 90000  0    
5     7    32 A0000  0    
5     8    32 B0000  0    
5     9    32 C0000  0    
5     A    32 D0000  0    
5     B    32 E0000  0    
5     C     8 F0000  0

2. Max RAM with HP-IL
400K of memory can be utilized using the string "939495969798999A9B9C9DAE00000000".

Code:
Port Dev Size Addr  Type
  0   0    4  E8000  0
  0   1    4  EA000  0
  0   2    4  EC000  0
  0   3    4  EE000  0
  5   0   32  30000  0
  5   1   32  40000  0
  5   2   32  50000  0
  5   3   32  60000  0
  5   4   32  70000  0
  5   5   32  80000  0
  5   6   32  90000  0
  5   7   32  A0000  0
  5   8   32  B0000  0
  5   9   32  C0000  0
  5   A   32  D0000  0
  5   B   16  E0000  0
  0   5   16  F0000  2  HP-IL

384K of RAM is configured from 30000-EFFFF. Plug-In ROM's and IRAM's always begin configuration on a 32K boundary, so the HP-IL ROM is at F0000.

3. FORTH/Assembler ROM installed, no HP-IL
336K of memory can be utilized using the string "939495969798999A9BAC000000000000".

Code:
Port Dev Size Addr  Type
  0   0    4  C8000  0
  0   1    4  CA000  0
  0   2    4  CC000  0
  0   3    4  CE000  0
  5   0   32  30000  0
  5   1   32  40000  0
  5   2   32  50000  0
  5   3   32  60000  0
  5   4   32  70000  0
  5   5   32  80000  0
  5   6   32  90000  0
  5   7   32  A0000  0
  5   8   32  B0000  0
  5   9   16  C0000  0
  1   0   16  D0000  2  FORTH

The high two pages of memory aren't available because of the hard-coded module. The FORTH ROM is configured at D0000. That leaves 320K for RAM.

4. FORTH/Assembler and HP-IL installed.
352K of memory can be utilized using the same config string as in 3., "939495969798999A9BAC000000000000".

Code:
Port Dev Size Addr  Type
  0   0    4  C8000  0
  0   1    4  CA000  0
  0   2    4  CC000  0
  0   3    4  CE000  0
  5   0   32  30000  0
  5   1   32  40000  0
  5   2   32  50000  0
  5   3   32  60000  0
  5   4   32  70000  0
  5   5   32  80000  0
  5   6   32  90000  0
  5   7   32  A0000  0
  5   8   32  B0000  0
  5   9   16  C0000  0
  0   5   16  D0000  2  HPIL
  1   0   16  D8000  2  FORTH

320K is available for RAM.

I would appreciate it if someone would verify my findings.

Dave
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Max 71B Memory Using FRAM71 - Dave Frederickson - 08-21-2015 05:36 AM



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