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INIT-Module for ERAMCO RSU-2 Rambox
Posted by PeterP on 18 Feb 2009, 6:37 p.m.
It comes with a set of functions that help the user to restore operation, clear parts or all of the RSU and load the operating system, all of this for all available banks and in a very convenient and save way. Last but not least, it also includes the original SETBANK, PORTON and PORTOFF functions from the RSU operating system. For the curious user, please also find the documented source code at the end of this document. Especially the documentation of the SETBANK instruction might be interesting to study.
XROM 04 01 INIT-RSU no function, module header 02 PORTON( ) the original function to turn on a port (-1 = 8, +3 = F) 03 PORTOFF(1) the original function to turn off a port 04 SETBANK(1) the original function to select a bank from 1-4 05 CLPOLLA function that clears all polling points in all pages and banks 06 CLRSUA function that clears all pages in all banks. CAREFUL! 07 CLPOLLB function that clears the polling points in bank specified via X-reg 08 CLRSUB function that clears all pages in bank specified via X-reg 09 CLBL( ) clear a block specified in X, can clear across page boundaries 10 COPYP(2) copy page S to page D, SD in alpha 11 CODE(2) code a NNN into X from Alpha 12 DECODE(2) decode a NNN from X into Alpha 13 ROMSUM(2) calculates and stores the correct checksum for a page 14 HEXIN( ) direct entry of a NNN 15 BLCAT(3) Block-cat showing the content of each page 16 RAMWR(2) MCODE Hexeditor to write directly into the RSU 17 SAVEROM(2) Save a page from X to HP-IL with name from alpha 18 GETROM(2) Get a page from HP-IL with name in alpha to page in X 19 LOCA(2) Find a specific MCODE word starting at address AAAA in alpha 20 LROM(2) Find last word in MLDL starting search backwards from AAAA in alpha 21 LDRSU Load the original operating system into pages E&F from HP-IL for all banks
Original functions come from the ERAMCO MLDL OS ,the Sandbox or the original RSU OS, though I did make certain changes here and there to the original code to fit the particular needs of this module.
In theory one would only need the functions CLRSUA (which clears all pages in all banks) and LDRSU (which loads the OS from HP-IL). However I find it useful to have some other tools at my disposal when trying to resurrect a dead Rambox.
Please let me know of any errors and suggestions.
Edited: 18 Feb 2009, 6:41 p.m.
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