Max 71B Memory Using FRAM71

[Dave Frederickson]

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

[Hans Brueggemann]

my findings on a 1BBBB w/ FRAM71 V511 are as follows:
(MEM values after MEMORY LOST, FORTH not initialized)

1. MAX RAM, no modules
939495969798999A9B9C9D9EBF
418252, 408 KB RAM
2. MAX RAM, w/IL
939495969798999A9B9C9DAE
393708, 384 KB RAM
3. MAX RAM, FORTH
93E495969798999A9B9C9DAE (93 is HC, E4 is SC ROM for FORTH)
328168, 320 KB RAM
4. MAX RAM, IL, FORTH
93E495969798999A9B9C9DAE (93 is HC, E4 is SC ROM for FORTH)
328149, 320 KB RAM



hans

[Dave Frederickson]

(08-21-2015 04:54 PM)Hans Brueggemann Wrote:  3. MAX RAM, FORTH
93D495969798999A9B9C9DAE (93 is HC, D4 is SC ROM for FORTH)
328168, 320 KB RAM
4. MAX RAM, IL, FORTH
93D495969798999A9B9CAD (93 is HC, D4 is SC ROM for FORTH)
295368, 288 KB RAM

hans

In Case 4, FRAM71 isn't being used for ROM as I was trying to determine the maximum allowable RAM. A physical module was used in my tests.

In Case 3, bonus points if you configured a 16K IRAM at D8000.

Dave

[Hans Brueggemann]

apologies, obviously edited my post without seeing your response... i reconfigured case 3 and 4 to E4 instead of D4, which makes results more comparable (and makes more sense anyway).

hans
(thanks for the bonus offer, will look into it after returning from vacation...)