08022: Main memory and extended memory capacity of PC98

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08022	Misc.	Major	Always	Jul 4, 2021, 07:39	Jul 6, 2021, 11:24

Tester	yrts	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Invalid report	OS	Windows 10 (64-bit)
Status [?]	Closed			Driver	nec/pc9801.cpp
Version	0.233	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	08022: Main memory and extended memory capacity of PC98
Description	The maximum main memory of PC98 is 640K, and the memory capacity after that is extended memory. If the "Models:" of "PC9801.cpp" exceeds 640K, the main memory will always be 640K. For example, "1.6M" is "640K+1024K". (Not sure about some special models for corporate use). Currently, when I run MAME, the main memory is set to 128K on almost all models. The correct value is "640K".
Steps To Reproduce	For example: mame pc9801ce2
Additional Information	On a completely different note, I can't read the .hdi on my HDD. I am investigating.
Github Commit

Flags
Regression Version
Affected Sets / Systems

Attached Files	pc9821cd2_3072K.png (17,073 bytes) Jul 5, 2021, 00:23 Uploaded by yrts
	pc9821cd2_640K.png (14,601 bytes) Jul 5, 2021, 00:23 Uploaded by yrts
	pc9821cd2_null&1024K.png (15,618 bytes) Jul 5, 2021, 00:23 Uploaded by yrts

No.19068 kmg Senior Tester Jul 4, 2021, 18:30	I'm assuming you mean 'pc9821ce2' since there isn't a pc9801ce2 in MAME. That being said I cannot reproduce this, though for the record I can't test the official MAME binary. Glancing at the driver it seems that it's only possible to have 128K on pc9801f, no other machine allows this configuration and almost everything else defaults to 1664K. If you aren't getting 1664K in general maybe you have a .ini file, say pc9821.ini, that has ram set to a different value? Still, the only valid values are 1664K,640K,3712K,7808K,14M.
No.19072 yrts Tester Jul 5, 2021, 00:24 edited on: Jul 5, 2021, 00:26	Thanks for the quick reply. I made a mistake with the command. As you pointed out, "mame pc9821ce2" is correct. I tried changing the ramsize value in mame.ini, but the main memory is still "128K". ramsize (null) : MEMORY 128K + 1024KB (correct: 640K + 1024K) ramsize 1664K : MEMORY 128K + 1024KB (correctly 640K + 1024K) ramsize 640K : MEMORY 128K (640K is correct) ramsize 3712K : MEMORY 128K + 3072KB (correct: 640K + 3072K)
No.19076 Kale Developer Jul 6, 2021, 07:56 edited on: Jul 6, 2021, 07:56	Cannot reproduce, i.e. if I do mame.exe pc9821ce2 -ram 3712k I get 640KB + 3072KB You probably have some MEMSW/dipswitch setting that hampers with the detected area? Try to clear nvram/cfg areas and try again. PS: been aware that the memory options aren't well configured for every machine in the driver(s). Parsing those is an ongoing process.
No.19077 yrts Tester Jul 6, 2021, 11:17	This was fixed by deleting the nvram/cfg! Thanks for the comment. I don't know how I changed the settings (mystery).
No.19078 yrts Tester Jul 6, 2021, 11:24	Sorry. I don't know how to change the status to closed.