Intel 9800758-02 manual Prom

BASIC-SO RMX/SO BASIC-SO

The configuration explained below does not use DFS. Accordingly, the CONTR, DFS, and NFILES options shown in the BQOPS.ASM module are set to 0, and there are no references to the DFS libraries in the GBASIC.CSD module shown.

With this configuration, memory must be organized as follows (see the iSBC 80/20 Hardware Reference Manual):

PROM:	0-25K
iSBC 80/20 onboard RAM: 30K		- 32K
iSBC 016 RAM:	32K	- 48K

This configuration uses an iSBC 80/20. It's more difficult to configure an iSBC 80/10 for a PROM-based BASIC-80, because of memory allocation, and we'll look at how to do this after explaining the iSBC 80/20 configuration.

There are three steps to generating a PROM-based BASIC-80:

1.You must modify or create a version of BQOPS.ASM that supports the options you need for your configuration. Figure 4 shows the contents of a BQOPS.ASM PROM configuration using an iSBC 80/20. Examine each option available; if any need to be changed, this file (as well as any other ISIS-II file) can be edited with the ISIS-II Text Editor or CREDIT. Refer to the ISIS-II User's Guide for further information about using the Text Editor.

CPU	SET	20	;MODEL OF CPU
BOOTED	SET	o	;ONE IF BOOT VERSION, ELSE 0
TERMH	SET	o	;1 FOR FULL TH, 0 FOR MINI
RATE	SET	28	;BAUD RATE FACTOR
CONTR	SET	o	;CONTROLLER NUMBER
DFS	SET	o	;NUMBER OF DFS FILES OPEN AT ONCE
UIO	SET	o ;11F USER I/O DRIVERS ELSE 0
NFILES	SET	o	;TOTAL FILES
HIRAM	SET	OBFFFH	;HIGHEST RAM LOCATION
BOTMEM	SET	OH	;BOTTOM OF BOOT LOADER RAM

Figure F-4. BOQOPS.ASM Module for PROM..Based BASIC-SO

2.You must also assemble BASCM.ASM, the BASIC-80 configuration module, and BQMEM.ASM, the memory allocation module. If these modules need to be changed to fit your configuration, you can edit them with the ISIS-II Text Editor.

3.You must then use the appropriate GBASIC.CSD file with SUBMIT, which will LINK and LOCATE the proper modules and their library references. Figure F-5 lists a GBASIC.CSD module that you could use with the PROM-based con- figuration specfied in figure F-4.

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